It was clogged. I spent hours trying to unclog it with air pressure and water pressure. I finally just gave up.

My husband came over and pushed down...

Thank you very much. I am going to print this out and digest it all for a bit. I will take still photos as well and post them on my next thread!...

Thanks for your reply, Ill have a go at changing them, no returning dirt just bubbles
Thanks
Neil

If you are replacing the o-ring, make sure you...

Either one of two things are going on here.

1. When he replaced the sand, he did not put enough in, causing the debris and dirt to pass right...

By chance...did you happen to recently purchase that pump, or replace the motor? If so, it sounds to me like your running "110" power, and...

Your pump may also be vibrating against the equipment pad. There is a plastic bracket the motor sits on to keep it from placing too much stress on...

Are you around for an extended period to make sure it actually is working fine? The reason I ask, is if you are running a 110v, and leave the pump...

It's possible. That stuff can get in the pipes if the installer is not careful.

i use the handle of a slim plastic scrub brush or a screwdriver handle to adjust jets. stick it directly into the "eyeball" of the return...

I have tried backwashing and vacuuming at the sametime when i had a D.E filter and there was powder all over. I worked out really well actually.

Her's a link to a related question I asked earlier.