Loss of pressure at filter

[silversteed]

I notice recently that I have lost about 10psi at my filter. I've gone through everything that I can think of to resolve the issue, but I'm not sure where to look now.

Yesterday I went out and backwashed the filter and I notice that when I put the multiport to backwash I gauge went up by 10psi, but then back down 10 psi after I returned the valve to filter.

Do you think that the multiport is leaking or could it be something within the filter housing?

Thanks for any help,

Jim

 

[duraleigh]

Pressure loss at the filter would be a restriction or blockage on the suction side of your system....that would also show up on the backwash psi......I am stumped.

 

[silversteed]

I am getting a lot of water via the returns so some how it isn't developing pressure...is it possible that the water is going into the filter but not going through the panels, basically just running through the filter and not filtering?

 

[Charlie_R]

A cracked manifold might cause the symptoms you describe. Might be worth opening it to take a look.

 

[jblizzle]

How old is the gauge? Does it go to 0 when the pump is off?

 

[silversteed]

How old is the gauge? Does it go to 0 when the pump is off?

I can't say how old the gauge is other than it has been there for more than 2 years.

The gauge does go to zero when off, 10 psi when filtering, and 20 psi when backwashing. Normally the gauge is at around 20 psi when the filter is clean.

 

[frustratedpoolmom]

You said you went through everything - have you opened it and inspected the grids? I agree with Charlie...

 

[jblizzle]

It is rather odd to me that the pressure while backwashing is higher than when filtering. I have never see that be the case. Usually there is less resistance after the filter just out a pipe than there is when going all the way back to the pool and through eyeball returns.