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10 Easy Steps To Adjust Well Pump Pressure Switch

Maintaining optimal water pressure in your home is essential for ensuring smooth operation of plumbing fixtures and appliances. The well pump pressure switch plays a crucial role in regulating water pressure by turning the pump on and off as needed. When the water pressure drops below a certain threshold, the switch activates the pump, which then pressurizes the water system. Conversely, when the pressure reaches a predetermined maximum, the switch shuts off the pump to prevent over-pressurization.

Adjusting the well pump pressure switch is a relatively simple task that can be accomplished by homeowners with basic plumbing knowledge. However, it’s important to take necessary safety precautions and follow the manufacturer’s instructions carefully to ensure proper functioning of the system. Before making any adjustments, turn off the power to the pump and release any pressure in the system by opening a faucet. Once the system is depressurized, you can proceed with adjusting the pressure switch settings.

The pressure switch typically has two adjustable settings: the cut-in pressure and the cut-out pressure. The cut-in pressure is the minimum pressure at which the pump turns on, while the cut-out pressure is the maximum pressure at which the pump turns off. The ideal pressure settings will vary depending on the specific water system and fixtures in your home. However, a common starting point is to set the cut-in pressure around 30 psi and the cut-out pressure around 50 psi. Once the adjustments are made, turn on the power to the pump and observe the system’s performance. If necessary, fine-tune the settings until the desired water pressure is achieved.

Understanding the Importance of Well Pump Pressure Switch

A well pump pressure switch is an essential component of your well water system, responsible for maintaining optimal water pressure and ensuring a consistent water flow. When properly adjusted, it prevents excessive pressure that could damage pipes and appliances and ensures sufficient pressure for household needs. Understanding the function and significance of a well pump pressure switch is crucial for the smooth operation of your water system.

Functions of a Well Pump Pressure Switch:

Controls Water Pressure: The pressure switch monitors water pressure in the system and regulates the pump’s operation to maintain a set pressure range.
Prevents Excess Pressure: When water pressure reaches the maximum limit, the switch trips, stopping the pump to prevent high pressure from damaging components.
Activates Pump When Needed: As water is drawn from the system, the pressure decreases. When it falls below the lower pressure limit, the switch signals the pump to turn on and replenish the water supply.

Benefits of Properly Adjusted Pressure Switch:

Prevents System Damage: Prevents excessive pressure that could burst pipes, damage fixtures, or strain appliances.
Ensures Optimal Water Pressure: Provides sufficient water pressure for household activities, such as flushing toilets, showering, and running appliances.
Prolongs Pump Life: Prevents the pump from overworking under high pressure or underrunning under low pressure, extending its lifespan.

Therefore, adjusting your well pump pressure switch accurately is crucial for maintaining a well-functioning water system, reducing costly repairs, and ensuring a comfortable water supply for your home.

Identifying the Location of the Pressure Switch

Identifying the location of the pressure switch is crucial for proper adjustment. Here’s a detailed guide to help you locate the switch:

1. Locate the Well Pump: First, determine the location of your well pump. Typically, it will be situated in a pit, basement, or outside shelter.

2. Inspect the Pump Housing: Inspect the housing of the well pump for the pressure switch. It’s usually a small, cylindrical device with two or more electrical wires connected to it. In some cases, it may be enclosed in a protective casing.

3. Check the Pressure Tank: If you cannot locate the pressure switch on the pump housing, check the pressure tank. The pressure switch is often mounted on the tank or connected to it via a short pipe.

4. Look for a Mounting Bracket: Pressure switches are typically mounted on a bracket or plate. Examine the area around the pump or pressure tank for a bracket or any other mounting structure.

5. Follow the Wires: If you’re still having trouble finding the pressure switch, follow the electrical wires connected to the pump or pressure tank. These wires will usually lead to the switch.

Once you have identified the location of the pressure switch, you can move on to adjusting its settings correctly.

Gathering Essential Tools and Materials

Before embarking on adjusting the well pump pressure switch, it is crucial to gather the necessary tools and materials to ensure a smooth and efficient process. This includes:

Tools:

Adjustable wrench or pliers
Pressure gauge (optional but recommended)
Screwdriver

Materials:

Pressure switch specifications:

It is essential to know the pressure setting ranges of your specific pressure switch. This information can typically be found on the switch itself, the manufacturer’s website, or the user manual. If you are unable to locate this information, it is advisable to contact the manufacturer for assistance.

Determining the desired pressure:

The ideal pressure setting depends on the specific water system and fixtures in your home. It is generally recommended to set the pressure switch to maintain a range between 30 and 50 psi (pounds per square inch). However, it is important to check the manufacturer’s instructions or consult a plumbing professional to determine the optimal pressure for your system.

Fixture	Recommended Pressure
Sinks and faucets	30-40 psi
Toilets	35-45 psi
Showers	40-50 psi

Once you have gathered the necessary tools and materials and determined the desired pressure, you are ready to proceed with adjusting the well pump pressure switch.

Adjusting the Cut-On Pressure

The cut-on pressure is the pressure at which the pump starts running. It should be set slightly above the pressure required to meet the demand of the home. To adjust the cut-on pressure:

1. Turn off the power to the pump.

2. Locate the pressure switch.

The pressure switch is usually located on the side of the pump or near the pressure tank.

3. Adjust the cut-on pressure setting.

Most pressure switches have two adjustments: a cut-on pressure setting and a cut-off pressure setting. The cut-on pressure setting is typically labeled "P1" or "PS." Use a wrench to turn the cut-on pressure setting screw clockwise to increase the pressure or counterclockwise to decrease the pressure.

4. Turn the power back on to the pump.

Run the pump for a few minutes to allow the pressure to stabilize. Check the pressure gauge to make sure that the cut-on pressure is set correctly. If the pressure is still too low or too high, repeat steps 2 and 3 until the pressure is set correctly.

|| Cut-On Pressure Setting || How to Adjust ||
|—|—|—|
| Increase the cut-on pressure || Turn the cut-on pressure setting screw clockwise ||
| Decrease the cut-on pressure || Turn the cut-on pressure setting screw counterclockwise ||

Setting the Cut-Off Pressure

To set the cut-off pressure, follow these steps:

Identify the cut-off pressure setting. This is typically a screw or knob on the pressure switch. It may be labeled “CUT-OFF” or “HIGH PRESSURE.”
Determine the desired cut-off pressure. This is the maximum pressure at which the pump should turn off. It is typically between 40 and 60 psi for residential water systems.
Turn the cut-off pressure setting clockwise to increase the pressure or counterclockwise to decrease it. Make small adjustments at a time.
Turn on the pump and observe the pressure gauge. The pump should turn off when the pressure reaches the cut-off setting.
Repeat steps 3 and 4 until the desired cut-off pressure is achieved.

**Tip:** If the pump does not turn off at the desired cut-off pressure, the pressure switch may be faulty and need to be replaced.

The following table provides a general guideline for setting the cut-off pressure based on the number of fixtures in a residential building:

Number of Fixtures	Recommended Cut-Off Pressure
1-2	40 psi
3-4	45 psi
5-6	50 psi
7-8	55 psi
9 or more	60 psi

Tips for Maximizing Well Pump Performance

1. Keep the Pump’s Inlet Screen Clean:

A clogged screen can restrict water flow and put excessive strain on the pump, causing pressure fluctuations and premature failure.

2. Inspect and Adjust Well Pressure Switch Settings:

The pressure switch controls the pump’s on/off cycles. Incorrect settings can lead to insufficient pressure or wasted energy.

3. Clear the Well Cap and Vent Hole:

A clogged cap or vent hole can prevent the pump from priming properly, leading to reduced flow and potential damage to the pump.

4. Lubricate the Pump Regularly:

Regular lubrication ensures smooth operation and extends the pump’s lifespan. Consult the manufacturer’s guidelines for lubrication intervals.

5. Monitor Pump Performance:

Watch for signs of decreased water flow, unusual noises, or changes in pressure. Prompt servicing can prevent costly repairs.

6. Install a Pressure Gauge:

A pressure gauge provides real-time monitoring of water pressure, allowing for early detection of any potential issues.

7. Inspect the Electrical Connections:

Loose or corroded connections can cause electrical problems and affect pump performance. Ensure all connections are tight and secure.

8. Check for Leaks:

Leaks along the pipe system can cause pressure loss and reduce water flow. Inspect joints and fittings regularly and repair any leaks promptly.

9. Add a Surge Protector:

Power surges can damage sensitive electronic components in the pump. A surge protector provides protection against voltage fluctuations.

10. Consider a Variable Speed Pump:

Variable speed pumps adjust their speed based on water demand, reducing energy consumption and providing a more consistent water pressure. They may be a good choice for homes with fluctuating water usage patterns.

How To Adjust Well Pump Pressure Switch

Well pump pressure switches are devices that automatically turn on and off your well pump based on the water pressure in your system. When the water pressure drops below a certain level, the pressure switch turns on the pump, and when the pressure reaches a certain level, the pressure switch turns off the pump.

There are two main types of well pump pressure switches: mechanical and electronic. Mechanical pressure switches use a diaphragm to sense the water pressure, while electronic pressure switches use a sensor to sense the water pressure.

To adjust a well pump pressure switch, you will need a wrench and a screwdriver. First, turn off the power to the well pump. Then, remove the cover of the pressure switch. You will see two springs inside the pressure switch: a cut-in spring and a cut-out spring. The cut-in spring determines the pressure at which the pump will turn on, and the cut-out spring determines the pressure at which the pump will turn off.

To adjust the cut-in pressure, turn the adjusting nut on the cut-in spring clockwise to increase the pressure or counterclockwise to decrease the pressure. To adjust the cut-out pressure, turn the adjusting nut on the cut-out spring clockwise to increase the pressure or counterclockwise to decrease the pressure.

Once you have adjusted the pressure switch, replace the cover and turn on the power to the well pump. The pump should now turn on and off at the correct pressures.

1. How to Adjust a Pressure Switch for a Well Pump

If you’re experiencing issues with your well pump’s water pressure, adjusting the pressure switch may be the solution. A pressure switch is a crucial component of a well pump system that ensures your home receives an adequate water supply at the desired pressure. By understanding how to adjust a pressure switch, you can optimize the performance of your well pump and address common problems.

To adjust the pressure switch, you’ll need a few basic tools, such as an adjustable wrench and a pressure gauge. Before making any adjustments, it’s important to turn off the power to the well pump and relieve any pressure in the system by opening a faucet. Locate the pressure switch, which is typically mounted on or near the pressure tank. It has two adjustable settings: the “cut-in” pressure and the “cut-out” pressure. The cut-in pressure determines the point at which the pump turns on to maintain water pressure, while the cut-out pressure sets the point at which the pump turns off once sufficient pressure is achieved.

To increase the water pressure, you’ll need to adjust the cut-in and cut-out pressures upwards. To decrease the water pressure, adjust these settings downwards. When making adjustments, it’s essential to consider the manufacturer’s recommended pressure range and the specific requirements of your household. Once you’ve adjusted the pressure switch, turn the power back on and check the water pressure using a pressure gauge. Fine-tune the pressure switch as needed until you achieve the desired water pressure for your home.

Identifying the Pressure Switch

A pressure switch is a crucial component in the operation of a well pump system, regulating the pump’s functionality based on water pressure levels. To effectively adjust the pressure switch, it is essential to first understand how to identify it.

Pressure switches are typically located near the well pump or pressure tank. They are often mounted on a bracket or wall and feature a series of terminals, wires, and a small diaphragm or piston.

To confirm the identification of the pressure switch, perform the following steps:

Observe the wiring: Locate the wires connected to the pump and pressure tank. Follow these wires to identify the device they lead to. The pressure switch is typically the only component with multiple wires attached.
Check the terminals: Look for a device with multiple terminals or connection points. The pressure switch will often have three or more terminals labeled “L1,” “L2,” “COM,” and sometimes “P” or “PB.” These terminals serve as connection points for the pump, pressure tank, and power source.
Identify the diaphragm or piston: A pressure switch typically features a diaphragm or piston that responds to changes in water pressure. Look for a small, round or cylindrical component that is attached to the switch body and connected to the water line.

By following these steps, you can accurately identify the pressure switch for your well pump system, paving the way for proper adjustment and optimal pump performance.

Isolating the Electrical Power

Disconnecting the Power Source

Before attempting any adjustments, it is crucial to ensure the safety of the well pump system. To do so, the electrical power supply must be disconnected. Locate the service panel or circuit breaker controlling the well pump and switch it off. Additionally, confirm that the power is truly off by using a voltage tester or multimeter to make sure there is no residual current flowing through the wires.

Safety Precautions

When working with electricity, it is imperative to adhere to safety precautions. Always wear protective gear, including rubber gloves and non-conductive shoes, to prevent electrical shocks. Avoid loose clothing or jewelry that could become entangled in the wires. If you are not confident in your ability to handle electrical components safely, consult a qualified electrician.

Identifying the Circuit Breaker

Typically, the service panel or circuit breaker for the well pump is labeled clearly. However, if you are unable to locate it, refer to the documentation that came with the pump and well system, or consult an electrician. It is also a good idea to label the circuit breaker for future reference.

Circuit Breaker Location	Possible Locations
Main Service Panel	Basement, garage, or outside the house
Subpanel	Garage, workshop, or other outbuilding
Outdoor Enclosure	Mounted on the exterior wall of the house near the well pump

Adjusting the Cut-In Pressure

The cut-in pressure is the pressure at which the pump will turn on. It should be set to 2 psi below the pressure at which your fixtures open. To adjust the cut-in pressure, follow these steps:

Locate the pressure switch on your pump.
Find the two screws on the pressure switch. The screw on the left adjusts the cut-in pressure, and the screw on the right adjusts the cut-out pressure.
Turn the screw on the left counterclockwise to decrease the cut-in pressure or clockwise to increase it. Make small adjustments, and test the pump after each adjustment until you reach the desired cut-in pressure.

Example Calculation

If your fixtures open at 40 psi, you would set the cut-in pressure to 2 psi below that, or 38 psi. To do this, turn the screw on the left counterclockwise until the gauge reads 38 psi.

Adjusting the Cut-Out Pressure

The cut-out pressure is the maximum pressure that the pump will reach before shutting off. It is important to adjust the cut-out pressure correctly to avoid damaging the pump or causing it to run unnecessarily. To adjust the cut-out pressure, follow these steps:

1. Turn off the power to the pump.
2. Remove the cover from the pressure switch.
3. Locate the adjusting nut on the switch.
4. Use a wrench to turn the adjusting nut clockwise to increase the cut-out pressure or counterclockwise to decrease it.

Turn the adjusting nut about 1/4 turn at a time.
Wait a few minutes for the pressure to stabilize.
Check the pressure gauge to see if the cut-out pressure has been adjusted to the desired setting.
Repeat steps 4-5 until the desired cut-out pressure is reached.

5. Replace the cover on the pressure switch.
6. Turn on the power to the pump.

Using a Pressure Gauge

A pressure gauge is an essential tool for adjusting a well pump pressure switch accurately. It measures the water pressure in the system and provides a visual reference for fine-tuning the switch settings.

Procedure:

Attach the pressure gauge: Connect the gauge to the discharge pipe of the well pump using the appropriate fittings. Ensure a tight connection to prevent leaks or inaccuracies.
Turn on the pump: Switch on the well pump and allow it to run until the system reaches its maximum pressure. Observe the pressure reading on the gauge.
Identify the pressure settings: Most pressure switches have two adjustable settings: "cut-in" pressure and "cut-out" pressure. The cut-in pressure is the point at which the pump turns on, while the cut-out pressure is the point at which it turns off.
Adjust the cut-in pressure: Use a screwdriver or wrench to adjust the cut-in pressure setting. Turn the adjustment screw clockwise to increase the pressure or counterclockwise to decrease it. The optimal cut-in pressure is typically around 20-30 psi less than the desired cut-out pressure.
Fine-tune the cut-out pressure: Adjusting the cut-out pressure is more precise and requires patience. Observe the pressure gauge as the pump is running and identify the point at which the water flow starts to diminish or become erratic. This indicates that the cut-out pressure is too high.
- If the cut-out pressure is too high: Turn the adjustment screw counterclockwise slowly until the pump reaches the desired cut-out pressure and the water flow becomes consistent.
- If the cut-out pressure is too low: Turn the adjustment screw clockwise slowly until the pump turns off at the desired cut-out pressure. Be cautious not to overtighten the screw, as this can damage the switch.
Verify the settings: Once the adjustments are made, verify the settings by turning the pump off and on several times. Observe the pressure gauge to ensure that the pump is turning on and off at the desired pressures.

Correctly Setting the Pressure Differential

The pressure differential, also known as the “cut-in” and “cut-out” settings, determines the range of pressure within which the pump will operate. Setting the correct pressure differential is essential for the efficient and reliable operation of your well pump.

1. Determine the Pressure Requirements: Before adjusting the pressure switch, determine the desired pressure for your water system. This can be determined based on the fixtures and appliances in your home that use water.

2. Locate the Pressure Switch: The pressure switch is typically mounted on the discharge side of the pump and has two adjustable settings: “cut-in” and “cut-out.”

3. Adjust the Cut-In Pressure: The cut-in pressure is the pressure at which the pump turns on. To adjust, rotate the screw marked “cut-in” in a clockwise direction to increase the pressure or counterclockwise to decrease it.

4. Adjust the Cut-Out Pressure: The cut-out pressure is the pressure at which the pump turns off. To adjust, rotate the screw marked “cut-out” in a clockwise direction to increase the pressure or counterclockwise to decrease it.

5. Pressure Differential: The pressure differential is the difference between the cut-in and cut-out pressures. A typical differential is 20-40 psi.

6. Determine the Ideal Pressure Differential: The ideal pressure differential depends on the system’s usage and characteristics. Here are some guidelines:

Pressure	Application	Advantages
20-40 psi	Homes with multiple bathrooms and appliances.	Provides consistent water pressure throughout the house.
40-60 psi	Homes with low water demand.	May cause water hammer in pipes if not properly installed.
60-80 psi	Homes with high water demand or with a lot of fixtures.	Can damage pipes and fixtures if set too high.

System Type	Ideal Pressure Differential
Residential homes	20-30 psi
Sprinkler systems	30-40 psi
Commercial buildings	40-60 psi
High-pressure systems (e.g., industrial)	60+ psi

7. Test and Adjust: Once you have set the pressure differential, turn on the pump and monitor the pressure using a pressure gauge. If the pressure is not within the desired range, make further adjustments until it is.

Tightening the Adjustments

Once you have made all the necessary adjustments to your pressure switch, it is important to tighten them down securely so that they do not come loose over time. To do this, use a wrench or pliers to tighten the nuts or bolts that hold the adjustment screws in place. Be careful not to overtighten them, as this could damage the switch.

Once the adjustments have been tightened, turn the pump back on and check to make sure that it is working properly. If the pump is not working properly, you may need to readjust the pressure switch.

Refer to the table above for a summary of the different adjustment screws on a pressure switch and what they adjust.

Restoring Electrical Power

8. Reconnecting Electrical Power:

– Ensure that the circuit breaker is in the “off” position.
– Recheck the wiring connections to the pressure switch, ensuring that they are secure and insulated.
– Tighten any loose wires or screws, using a non-contact voltage tester to ensure that there is no power flowing.
– Reconnect the wires to the pressure switch terminals, adhering to the wiring diagram.
– Place the cover back on the pressure switch and secure it tightly.
– Flip the circuit breaker back to the “on” position to restore electrical power.
– Observe the pressure gauge to ensure that the pressure is within the desired range (typically 40-60 psi for residential use).

Testing the Pressure Switch

To test the pressure switch, you will need a multimeter or continuity tester. Follow these steps:

1. Turn off the power to the well pump.
2. Disconnect the wires from the pressure switch.
3. Set your multimeter or continuity tester to the ohms setting.
4. Connect one lead of the multimeter or continuity tester to one terminal on the pressure switch.
5. Connect the other lead of the multimeter or continuity tester to the other terminal on the pressure switch.
6. If the multimeter or continuity tester reads zero ohms, the pressure switch is closed.
7. If the multimeter or continuity tester reads infinite ohms, the pressure switch is open.
8. If the pressure switch is closed, turn it clockwise to increase the cut-in pressure or counterclockwise to decrease the cut-in pressure.
9. Reconnect the wires to the pressure switch and turn the power back on to the well pump.

Adjustment Screw	What it Adjusts
Cut-in pressure	The pressure at which the pump turns on
Cut-out pressure	The pressure at which the pump turns off
Differential pressure	The difference between the cut-in and cut-out pressures

Cut-in Pressure Range (psi)	Cut-out Pressure Range (psi)
20-40	40-60
30-50	50-70
40-60	60-80

If the cut-in pressure is too high, the well pump will not turn on until the water pressure in the system drops too low. If the cut-in pressure is too low, the well pump will turn on too frequently and may not be able to keep up with the demand for water.

Troubleshooting Common Issues

1. The well pump is not turning on.

Check if the power is on at the breaker or fuse box.
Check if the pressure switch is activated. The switch should “click” when the water pressure drops below a certain level.
Check if the pressure switch is clogged with debris or sediment. Clean the switch with a soft brush or compressed air.
Check if the pressure switch is set properly. The correct pressure settings will vary depending on your system.

2. The well pump is running constantly.

Check if there is a leak in the water system.
Check if the pressure switch is set too high. The pressure switch should be set to a pressure that is at least 10 psi below the pump’s maximum pressure.
Check if the pressure tank is waterlogged. The pressure tank should be pumped down to 0 psi and then repressurized to 2 psi below the pump’s cut-in pressure.
Check if the well pump is oversized. The pump should be sized to meet the water demand of the house.

3. The water pressure is too low.

Check if the pressure switch is set too low. The pressure switch should be set to a pressure that is at least 10 psi below the pump’s maximum pressure.
Check if the pressure tank is undersized. The pressure tank should have a capacity that is at least 20 percent of the pump’s capacity.
Check if the water filter is clogged. A clogged water filter can restrict water flow and reduce water pressure.
Check if the well is running dry. A dry well will not be able to supply enough water to the house.

4. The water pressure is too high.

Check if the pressure switch is set too high. The pressure switch should be set to a pressure that is at least 10 psi below the pump’s maximum pressure.
Check if the pressure tank is overinflated. The pressure tank should be inflated to 2 psi below the pump’s cut-in pressure.
Check if the pressure relief valve is working properly. The pressure relief valve should open at a pressure that is 10 psi above the pump’s maximum pressure.
Check if the well pump is oversized. The pump should be sized to meet the water demand of the house.

5. The well pump is making strange noises.

Check if the pump is cavitating. Cavitation can occur when the pump is running dry or when the suction line is clogged.
Check if the pump is overheating. Overheating can be caused by a lack of water, a clogged discharge line, or a faulty motor.
Check if the pump is worn out. A worn-out pump may make a variety of noises, including squealing, grinding, or humming.

6. The well pump is leaking.

Check if the pump seal is leaking. The pump seal is located at the point where the pump shaft enters the pump body.
Check if the pump housing is leaking. The pump housing is the metal casing that surrounds the pump components.
Check if the discharge line is leaking. The discharge line is the pipe that carries water from the pump to the house.
Check if the suction line is leaking. The suction line is the pipe that carries water from the well to the pump.

7. The well pump is tripping the circuit breaker.

Check if the pump is overloaded. The pump may be overloaded if it is running dry, if the suction line is clogged, or if the discharge line is kinked.
Check if the circuit breaker is faulty. A faulty circuit breaker may trip even if the pump is not overloaded.
Check if the wiring is faulty. Faulty wiring can cause the circuit breaker to trip even if the pump and circuit breaker are in good condition.

8. The well pump is not priming.

Check if the suction line is filled with water. The suction line must be filled with water in order for the pump to prime.
Check if the foot valve is clogged. The foot valve is located at the bottom of the suction line and prevents water from draining back into the well.
Check if the check valve is stuck. The check valve is located at the discharge line and prevents water from flowing back into the pump.

9. The well pump is short cycling.

Check if the pressure switch is set too close to the pump’s cut-in pressure. The pressure switch should be set to a pressure that is at least 10 psi below the pump’s maximum pressure.
Check if the pressure tank is too small. The pressure tank should have a capacity that is at least 20 percent of the pump’s capacity.
Check if there is a leak in the water system. A leak in the water system can cause the pump to short cycle.
Check if the pump is oversized. The pump should be sized to meet the water demand of the house.

10. The well pump is not working properly.

Check if the pump is connected to a power source.
Check if the pump is turned on.
Check if the pump is properly sized for the well.
Check if the pump is installed correctly.
Check if the pump is damaged.
Call a qualified electrician or plumber to troubleshoot the problem.

How To Adjust A Pressure Switch For A Well Pump

A pressure switch is a device that turns a well pump on and off based on the water pressure in the system. It is important to adjust the pressure switch correctly to ensure that the pump is operating properly and that the water pressure is within the desired range.

To adjust a pressure switch, you will need a few tools, including a wrench, a screwdriver, and a pressure gauge. You will also need to know the desired cut-in and cut-out pressures for your system. Once you have gathered your tools and information, you can follow these steps to adjust the pressure switch:

Turn off the power to the well pump.
Locate the pressure switch on the pump.
Remove the cover from the pressure switch.
Locate the two screws on the pressure switch. One screw is labeled “cut-in” and the other is labeled “cut-out”.
Use a screwdriver to adjust the cut-in screw. Turn the screw clockwise to increase the cut-in pressure and counterclockwise to decrease the cut-in pressure.
Use a screwdriver to adjust the cut-out screw. Turn the screw clockwise to increase the cut-out pressure and counterclockwise to decrease the cut-out pressure.
Replace the cover on the pressure switch.
Turn on the power to the well pump.
Use a pressure gauge to check the water pressure in the system.
Adjust the pressure switch as necessary until the water pressure is within the desired range.