Pressure gauge very low

Macuick

Member
May 19, 2017
12
MS
Hi! I just turned my pool pump on and the pressure is below 10, usually closer to 20. Do I backwash? I thought the need to backwash would increase pressure.
 

JJ_Tex

Gold Supporter
Bronze Supporter
Jul 17, 2019
2,298
Prosper, TX (DFW)
Pool Size
13000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Interesting. When you say the pressure used to be 20, and now is 10, was that at the same RPMs? Backwashing cant hurt, but I'm not sure it will help. Typically you start off with a clean pressure, then backwash when your pressure rises ~20% from that, so the backwashing lowers the psi.
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
36,438
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Sudden lower filter pressure implies a blocked suction. Either the skimmer weir door is stuck, the skimmer basket is full of debris, and/or the pump basket is full of debris.
 

Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
20,950
Bedford, TX
Mac,

Tell us what your were doing just before the problem occurred.. Vacuuming maybe???

My normal pressure is about 1 to 2 lbs.. If your normal pressure is 20 lbs. than I would have to assume you are running your pump way, way too fast... :scratch:

What speed do you normally run your VS pump??

Thanks,

Jim R.
 
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