working a DE filter

Always premix it with water to get a nice slurry otherwise it will clump up in the filter rather than properly precoat the filter.

Quote:

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Originally Posted by fog80

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?

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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.

Quote:

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Originally Posted by blk133

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.

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thanks I think your right.

I just found some paperwork the previous owner had left and he said to add 6 lbs of DE after backwashing.

Quote:

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Originally Posted by blk133

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.

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Sorry, but 'bumping' again after the water is out of the filter won't do anything. The way I've always done an EC-(whatever) is to;
1. Turn the pump off.
2. Open the air relief valve for 5 sec. - to relieve the pressure.
3. Push the handle down SLOWLY and raise it up Quickly. Repeat 4 - 6 times.
4. Open the bottom plug on the filter( some smart installers put in a valve).
5. turn on the pump for a minute (+/-) till the water runs ~clear.

Hooray! You just got a bunch of your DE out. If you have water in the pool to spare, replug the bottom drain, run the pump for a couple of minutes and do it all over again (steps 1 - 5). You will see more 'stuff' comming out of the a** end of the filter.
The big piont is that you won't get more than 80% of the stuff out, so only add ~ 5 lbs back into the filter when you put the DE into the skimmer - 'more is better' is a typical American ideology' - and it's usually wrong.
Sorry to contradict the previos poster, but you came here for good info and his is just a little off.

thanks a lot.