The Pentair Diffuser Assembly (154906) is the OEM replacement diffuser for the Triton II TR140 sand filter, engineered to restore proper water distribution and filtration performance in this specific filter model. The diffuser sits at the top of the filter tank, directly above the sand bed, and channels incoming water evenly across the full filter surface. A cracked, warped, or broken diffuser concentrates flow in one area of the sand bed — bypassing clean sand, reducing filtration effectiveness, and causing channeling. Replacing it with the correct OEM part restores balanced, full-bed water distribution. Specifications Pentair Part Number 154906 Part Name Diffuser Assembly Fits Filter Model TR140 Quantity Included Each (1) Fits Into Brand Equipment Line Model / Part Number Notes Pentair Triton II TR140 Diffuser assembly for TR140 Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering. Poolaroo Pro Tip Before installing the new diffuser, inspect the standpipe and lateral assembly beneath it for cracks or sediment buildup. Debris around the standpipe O-ring or a damaged lateral can replicate the same poor-filtration symptoms as a failed diffuser — addressing everything in one service visit saves you from opening the tank again. Confirm the correct sand load per your TR140 manual before closing up.
