Quck answer
Bleeding a well pressure tank is an essential maintenance task to ensure proper functioning of your well system. Here are the steps to bleed a well pressure tank:
1. Turn off the power supply to the well pump.
2. Locate the pressure relief valve on the tank and open it to release any built-up pressure.
3. Attach a hose to the valve and direct it to a drain or bucket.
4. Slowly open the valve to allow water to flow out until all air is expelled from the tank.
5. Close the valve and remove the hose.
6. Turn on the power supply to the well pump.
Regularly bleeding the well pressure tank will help maintain water pressure and prevent damage to the well system.
If you own a well, chances are you have a pressure tank nearby. The purpose of the pressure tank is to maintain water pressure and prevent the pump from cycling every time you use a faucet. There are two types of pressure tanks: hydro-pneumatic tanks that contain both air and water in a single compartment, and bladder tanks that have two compartments separated by a rubber bladder. One compartment holds water and the other contains pressurized air. The air pressure is crucial for the pump to function properly, and if it becomes too high, you may need to release air from the tank. This is usually only a problem with bladder tanks. Hydro-pneumatic tanks rarely have excessive air.
Optimal Air Pressure
Bladder-style pressure tanks come pre-charged by the manufacturer and usually have the factory air pressure indicated on a label. Typically, it is around 30 psi, but ideally, the air pressure should be 2 psi lower than the cut-in pressure set for the pump. For example, if the pump is set to turn on at 30 psi, the air pressure in the tank should be 28 psi. This ensures a small amount of water pressure in the system at all times.
Not Too High, Not Too Low
If the air pressure in the pressure tank is lower than the optimal value, the bladder will over-expand when the tank is filled with water, potentially causing the rubber bladder to rupture. On the other hand, if the pressure is too high, it can be dangerous. The Schrader valve may rupture or the pump may cycle irregularly. It is important to periodically check the tank pressure and release some air if it exceeds the pump’s cut-in pressure by more than 2 psi.
Releasing Air from the Well Pressure Tank
To determine the cut-in pressure of your pressure pump, take note of the pressure displayed on the gauge when the pump cycles on. Write down this number.
Next, turn off the pump. The easiest way to do this is by switching off the breaker in the electrical panel. Open a faucet close to the well pressure tank, preferably a basement laundry faucet, to drain the tank. Allow the water to run until it stops and leave the valve open.
Locate the Schrader valve, which is usually on the top or side of the tank near the top. It resembles the air valve on car tires. Use a car tire pressure gauge to check the pressure and compare it to the pump’s cut-in pressure.
If the pressure is too high, release air from the tank. Press the valve pin with your finger to release a small amount of air, then check the pressure again. Repeat this process until the pressure is 2 psi lower than the pump’s cut-in pressure.
Note that if you have a hydro-pneumatic tank, it is advisable to call a plumber if you suspect that bleeding is necessary. In most cases, it is not required, but a professional familiar with your specific system can provide a reliable assessment and determine the best course of action if bleeding is indeed needed.
