Is my pump/filter operating properly?

[duraleigh]

During the transition from good flow to low flow, what does your filter guage do? Have you backwashed?

[famdog]

The filter is solid on 21 lbs. I backwashed last week, no change. Thx.

[duraleigh]

Wow! That's a puzzle!

I can think of nothing that would cause a drop in flow without a resultant increase or decrease in filter pressure. Sorry I can't help.