Hayward SuperPump2 1.5 hp with EC 75 filter?

There's a hole in the filter allowing DE and dirt to pass. Find hole and repair or buy new. I just bought new grids off of ebay, great deal. I payed $112 for complete set by Unicel and saved over $100 My filter is a Hayward DE4820

if you buy an adaptor,should be a 1 1/2" dia hole,in the bottom of the skimmer, put it in the skimmer hole,put your vac line on that, turn the valve to it's on full skimmer, it will work,
thats a nice filter,pool guys will sell you anything!
esp at this time of year!
buy the minumum!

Here is a copy of the users manual for these pool filters. It should give you detailed instructions about installing the Hayward Perflex.

http://www.backyardcitypools.com/images/hayward/perflex-system-manual.pdf

I maintain three commercial pools ... one a hot tub. We replaced the DE with sand filters this spring. The last year of DE - even with insisting the patrons shower first, we only got one week out of the DE ... and we were dumping the water also. Suntan oil, body oils ... it was a mess. The water was sparlking for 6 of the 7 days ... The only way to keep it that way was dump the water and change the DE.

Maybe your filter is not big enough. Had you given the gallons or the size of your pool, I would have calculated the filter area for you. If you can post it and if FixYa, notifies me, I would be glad to do the calculation.

Here is a link to the hayward manual. Be sure to follow the pre-coating insturctions carefully.
Use only the swimming pool grades of
diatomite, such as:
CELATOM . . . . . . . . . . . Eagle-Picher Industries, Inc.
AQUA-CEL . . . . . . . . . . Johns-Manville Products Corporation
DICALITE 4200 . . . . . . . Grefco, Inc.
WITCO . . . . . . . . . . . . . Witco Corporation
The EC-50 filter uses a 5 lb. (2.3 kgs.) charge of diatomite (D.E.)

Here is a link to the hayward manual for a EC-50 I think its almost the same as the EC-45
http://www.haywardnet.com/products/manuals/pdfs/manual10.pdf

Here is a copy of the users manual for these pool filters. It has detailed illustrations about how the filter should be put together.

http://www.backyardcitypools.com/images/hayward/perflex-system-manual.pdf

YOU HAVE A BAD GRID-GRIDS IN YOUR FILTER. TAKE THEM OUT AND FIND OUT WITCH ONE IS BAD . DO THIS IN THE SHADE DIRECT SUN KILLS THESE GRIDS.. WELCOME TO THE HAYWARD NORTHSTAR .. REMEMBER TO VOTE OR COMMENT .. IT IS THE FUEL TO KEEP ME TRYING TO HELP U GUYS .. JAY

Try checking the users manual. I don't have an exact answer for you, unfortunately, but the users manual for these pool filters is comprehensive and has diagrams. Hopefully, you can find your answer there.

http://www.backyardcitypools.com/images/hayward/perflex-system-manual.pdf

I believe that this particular model is a DE pool filter. Is that correct? If you are operating with a media other than DE, let me know. Assuming that you ARE using DE:
1. You DE could be coated to the maximum with pool dirt algae, etc. To correc this problem, you need to bump the filter.
2. You could have an overcharge of DE. To remedy,
Bump-Drain-Recharge.
3. Restriction in return line caused by small
eyeball fitting. To correct, change to a larger sized fitting.
4. You could have a partial closed valve on a return line. You will just need to open the valve.
5. Make sure that your pump strainer basket and pool skimmer basket are not clogged.
6. Make sure that your pump impeller valves are not clogged.