High PSI Pressure in filter


New member
Jun 16, 2019
I have a Pentair Whisperflo 6 W/DE filter, top manifold. The Breather tube has a hole in the mesh cap. The manifold has a hairline crack. Could this be the cause of the high pressure? The pressure never goes pass 33psi.
I cleaned the filter, found and replaced a cracked pump impeller. replaced all the seals on the pump.
I replaced all filter grids. brand new
HELP! I have spent money on several different repairs thinking this was the issue.
turns out none are the issue.


Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
Laughlin, NV
Has the filter always had this high pressure?

Typically high filter pressure is indicating the filter needs to be cleaned. Also algae can quickly plug a DE filter.