Pentair TR100/TR140 Tee Diffuser Assembly (156355) thermproducts or the filter housing before

or the filter housing before ordering

That kind of detail matters in baths where the visible interior finish is a big part of the appeal

The multiple application references give this cartridge practical value because accurate cartridge replacement depends on matching the new part to the original filter family

Installed in a compatible spa

or equipment refurbishment

Pentair TR100/TR140 Tee Diffuser Assembly (156355) thermproducts or the filter housing beforeThis genuine Pentair Pool Products tee diffuser assembly, part 156355, helps distribute incoming water inside compatible TR100 and TR140 sand filters. Proper diffusion reduces concentrated flow patterns and supports more even movement across the sand bed for dependable filtration. Use this replacement when the original diffuser is cracked, missing, or damaged during internal service. It is especially useful during a full filter rebuild, sand