working a DE filter

[blk133]

actually mine looks older than that. Mine doesnt have any black on it at all. It is all beige with a bunch of little bolts that hold the top cover on.


and when I say high, the psi was somewhere around 30 and I remember the previous owner saying that it should be somewhere around 15-20 i believe.

if it stays pretty warm today I will open up the filter, hose off the inside and put some more DE in it and run it.

one more question, how do i determine how much de I need?

Yours then is Hayward EC 65 or EC 75. Do a search in google for Hayward EC 65 and look at the picture.
I have EC65 (beige), they used to be beige, now they make them in gray color

My pressure is between 18-20 with 1 1/2 inches piping
Some info I found on backwashing:

Turn pump off.
Open backwash valve.
Bump handle slowly 15 times.
Turn pump on and run it for 2 minutes.
Turn pump off.
Bump handle slowly 15 times.
Turn pump on for 1 minute.
Turn pump off.
Close backwash valve tightly.
Turn pump on.
Add D.E. to the skimmer located closest to pump.
For Hayward EC-40 / EC-50 Filters use (3) 1 LB coffee cans of DE
For Hayward EC-65 / EC-75 Filters use (5) 1 LB coffee cans of DE (some websites say for EC-65 it's 6 lbs and for EC-75 it's 7 lbs)

I don't think it will hurt to put 6 lbs even if it's 5 that it needs.

Add D.E. to skimmers SLOWLY. Don't CLOG them !

Check pool water level after backwashing - add more water if necessary !

Hope this helps.

B.