Pentair multi port valve 27-1141 - DE enters the pool

[wsommariva]

Hi everyone,

Fiberglass pool is 7 or 8 years old. 10,000 gal in ground. 1.5 HP pump, 36 sq ft DE Pentair filter.

I backwashed and added new DE. I noticed foam in the pool immediately. Never happened before. My Dolphin Nautilis pool cleaner picked up alot of DE. I think that most of the DE I just added entered the pool through the eyelet returns. I did some research and I need to check the manifold o ring. I will just replace it.

The grids are brand new.

I can't find any info or parts for the valve. I THINK the model is what I entered above.

Any know of problems with these types or models of valves?

Thanks