Sometimes the problem can be with the filter gauge itself.
Air bleeder valve sand filter.
Upon start up opening the air relief provides a vent for trapped air.
Turn off the power supply of your sand filter.
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.
It is located on the top of the sand filter canister and you have to rotate it anticlockwise to open it.
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.
Over time air becomes trapped inside the filter causing pressure to build up inside the filter body.
Opening the air relief valve allows the air built up in the filter to bleed out slowly removing the pressure problem.
To relieve air pressure in the tank simply open the air relief valve upon turning on the system.
Next you have to open the air relief valve.
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.
Working alongside the pressure gauge is the air relief valve.
Measures 3 inch length by 1 1 2 inch height by 1 3 4 inch width.
This air bleeder tee assembly is designed to use with pentair triton ii pool and spa sand filter models tr140 tr50 tr60 tr100 and also compatible with pentair system 3 ss series pool and spa sand filter models s7s50 s8s70.
This is vital for a couple reasons.