New DE filter installed worked fine till first backwash now it has 0 psi pumppressure

[Manslick]

I’d guess maybe you didn’t let the pump run long enough.
When I recharge my DE filter it sometimes takes several minutes for the system to get back. During the loading phase the pressure reads zero. A lot of air comes out of the jets and eventually all is well.
Sometimes though it never comes back and I have to prime the pump. Even then it takes a few minutes to stabilize.

[waste]

Welcome to the Forum!

Please look at this thread for using your DE filter.

Check to see if teh skimmer weir (door) didn't get stuck in the up position. Also check to see that you didn't backwash so much water out of the pool that the skimmer is sucking air.

[ocgamer]

I read the DE filter FAQ, which pretty much covered everything I already did except about the bleeding of the air prior to adding DE on the filter to allow DE to stick to the grids. I did this but my problem still exists. Im wondering if air can go from the filter to the pump strainer?

[waste]

Air can't pass backwards through the system against the flow of water. Check the seal on the pump lid. I assume you have air in the pump while it's running, if it's not the seal, there is a leak in the plumbing and we'll help you trace it down.