We have a DE filter, model 1651-000, hooked up to a haward powerflow xl pump.
Untill recently the PSI guage was reading 13.
First, what should this filter run at for a normal level?
Second, today it started running at 17. And when I turn the pump off the pressure gauge does not drop to zero unless I tap it.
IS this an indication that the gauge itself is bad?
I tried back flushing out the system, but apparently it doesn't do any good as far as the PSI rating goes.
Any help apprecated. Thanks.