Sand Filter top Part

The part shown in red has a small crack for the Value to screw in and now leaks air.

This is after years of having a working Value. A new one was inserted as the old one was

pretty much gone and I thought the air was from the Value unit.

I need this part?

What do I measure for the correct part.

Triton II

Model TR-100 PN 140210

Hi RedPath,

Thanks for the photos those really help! You will need this Pentair TR100 Air Relief Assembly which we do currently have in stock and ship out to you ASAP.