I have noticed that the pressure in my sand filter will go up 8-10 PSI, only to drop about 5 PSI lower if I turn the filter off and then restart it again later. Has anyone else noticed this with their sand filter?
Pressure change - sand filter
- Thread starter jordangregory
- Start date
Can't say that I have. When you turn the filter off, does the guage return to zero psi?
Yes it does.
I am wondering if the dirt in the filter somehow settles a bit and changes orientation which allows more water through.
I am wondering if the dirt in the filter somehow settles a bit and changes orientation which allows more water through.
Mine will do that frequently (but not always) and it is for exactly the reason you suggest.
There is apparently a smooth enough flow on top of the sand bed that, I believe, allows a fine "covering" of dirt and debris to form and restrict the flow.....thereby increasing the psi.
It must be a very thin, uniform layer because when I shut of the pump, that abrupt stoppage of the flow loosens that fine layer and allows the water to pass more freely when the pump restarts.
It could also be loosened or disturbed instead at the time the pump restarts which might make more sense but I do see that often with my filter.
There is apparently a smooth enough flow on top of the sand bed that, I believe, allows a fine "covering" of dirt and debris to form and restrict the flow.....thereby increasing the psi.
It must be a very thin, uniform layer because when I shut of the pump, that abrupt stoppage of the flow loosens that fine layer and allows the water to pass more freely when the pump restarts.
It could also be loosened or disturbed instead at the time the pump restarts which might make more sense but I do see that often with my filter.
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