PSI at zero

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
43,238
Tucson, AZ
:wave: Welcome to TFP!!!

No.
Are you sure you are in filter mode?
What filter and valve do you have?
Please put your pool and equipment details in your signature.
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
43,238
Tucson, AZ
Nope, because we do not know filter and multi-valve models that you have or the pressure behavior in other modes of operation.
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
22,837
San Dimas, CA (LA County)
If the vacuum head sticks to the floor and there's no water flowing, that would cause filter pressure to drop.

I know my filter pressure drops and the flow is reduced when I'm drawing just from the vacuum. It doesn't like that long corrugated hose compared to the short smooth pipes, but it never drops to zero.