Found these inside my heater manifold

[aholmes5]

I took apart my heater (Pentair Mastertemp 400) to replace my manifold bypass. Inside the manifold I found 3 of these pieces. Inspect the outflow through the salt cell and return valve and didn't find anything else. They are a stiff plastic and it looks like one side was glued to something at one point.

I've recently replaced an inflow valve actuator and the master pump seal and flange. I recently had my DE filter (Pentair FNS 60) disassembled for backwashing - this is immediately before the heater. My best guess is that these came from either the DE filter or the multiport valve but I really don't know.

Any idea where these bits came from?

Thanks!

 

[tstex]

Hello neighbor

Are these supposed to be white colored that looks like they have rust or brown on them?

How old is your pool/install and how long ago did you do each of these things you described?

 

[JamesW]

Did you have any bad filter grids?

 

[aholmes5]

Did you have any bad filter grids?

Possibly - I had DE in the pool the last time I refilled the filter with DE. I had assumed the multi port valve didn’t seat right but it could have been one of the screens.

 

[JamesW]

The pieces might be plastic from the internal ribs of the grids.

When you break down the filter to clean it, check the fabric for tears and feel the internal grids for damage.

 

[aholmes5]

OK thanks. My grids are pretty old (~10years). Maybe time to replace them all.