Filter pressure

[Ymh]

My current filter pressure is 23 psi. (Hayward progrid de filter) I’m not sure if I need to backwash. I don’t remember the usual pressure but when I opened my pool it was quite dirty (I hadn’t opened at all Last summer) and maybe it already needs a backwash. Please advise. Thanks.

 

[DaveTheAccountant]

I would go ahead and backwash it, then take note of your new normal.

 

[Ymh]

If the issue is related to algae, would I slam first and then backwash?

 

[Ymh]

Filter pressure has risen to 24. Should I turn it off until I can backwash?

 

[1poolman1]

Filter pressure has risen to 24. Should I turn it off until I can backwash?

That is high. What pump do you have? Can you slow it down? High pressure will eventually warp the grids. You may have to open the filter and use a good hose nozzle to get all the DE off the grids it it hasn't been torn down in a while.

 

[Ymh]

It was done at the end of last pool season

 

[Ymh]

I did a quick backwash and rinse. Water was very clear pretty quickly. Pressure is now 18 psi. Should I clean the inside of the filter? Any instructions on how much de to put back in?

 

[Ymh]

I assume it must be an algae issue. But I’m not sure of the best way to proceed.

 

[1poolman1]

I did a quick backwash and rinse. Water was very clear pretty quickly. Pressure is now 18 psi. Should I clean the inside of the filter? Any instructions on how much de to put back in?

How large is the filter? Square feet?

 

[Ymh]

It’s a Hayward de 6020.

 

[Ymh]

I passed the overnight test within .5

 

[Ymh]

Should I clean the cartridges first? Are there any instructions here how to do that?