help? filter pressure issue!

[badutahboy]

Awesome.. thanks for your help folks

[waste]

As aylad can tell you, she doesn't use a pressure gauge, you can use the flow from the returns to 'gauge' when the filter needs to be cleaned. When the filter needs cleaning, the flow out of the returns is a lot lower than when the filter is clean. But, as Mark said, you can use the pressure rise on high speed to determine when you need to backwash.

[Poolsean]

Most people in the industry will use a 7-10 psi rise as a guage, regardless of the type of filter. I have a cartridge filter and go by a 7 psi rise.
It's best to use your starting pressure on high speed.

[mas985]

Most people in the industry will use a 7-10 psi rise as a guage, regardless of the type of filter. I have a cartridge filter and go by a 7 psi rise.
It's best to use your starting pressure on high speed.

I never quite understood why the industry recommends such a high PSI increase. 7 PSI is over 15 feet of head increase and I bet if you look on your pump head curve, you will be decreasing flow rates by over 25%. A 10 PSI increase is close to 23 FEET OF HEAD. Way too high for my comfort.

I clean my filter when it is not more than 1 PSI increase. Of course this is still only twice a year but even if I had to clean it once a month, I don't think I would let it get much above 3 PSI.