Turn off the power supply of your sand filter.
Air bleeder valve sand filter.
This keeps air out of the tank and allows for maximum efficiency of filtration.
Opening the air relief valve allows the air built up in the filter to bleed out slowly removing the pressure problem.
Upon start up opening the air relief provides a vent for trapped air.
Next if your filter has a bleeder valve usually at the top of the filter open this while the filter and pump are running until water spits out of the valve and then close immediately.
Measures 3 inch length by 1 1 2 inch height by 1 3 4 inch width.
This is vital for a couple reasons.
Working alongside the pressure gauge is the air relief valve.
To alleviate this pressure filter s are installed with an air relief valve positioned on top.
Air in the tank also competes with water passing through it which can affect the ability of the water to flow through the entire filtration system compromising the filter s efficiency.
As another level of safety pull out the power plug so that you are safe from any accidental electric shock.
Air builds up inside the filter tank when the pump has been off or has lost prime.
It is located on the top of the sand filter canister and you have to rotate it anticlockwise to open it.
Sometimes the problem can be with the filter gauge itself.
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To relieve air pressure in the tank simply open the air relief valve upon turning on the system.