Pentair Diffuser Assembly | TR-40/50 Sand Filter | 154598 Vacuum Heads Measure your existing basket's outside

Measure your existing basket's outside diameter before ordering — some SP1091 and SP1096 variants shipped with different basket sizes depending on production date

Replace if cracked or deformed before reassembly

200LP Manifold Bypass Valve Kit

check all wheel tube bearings at the same service interval — uneven wear across multiple bearing positions is common

the impeller cannot be secured without it

Pentair Diffuser Assembly | TR-40/50 Sand Filter | 154598 Vacuum Heads Measure your existing basket's outsideThe Pentair Diffuser Assembly (154598) is the OEM replacement diffuser assembly for the Pentair TR 40 and TR 50 fiberglass sand filter series. What It Does The diffuser assembly directs the flow of water evenly across the filter sand bed, ensuring consistent filtration performance. A cracked, warped, or missing diffuser results in uneven water distribution through the media, reducing filtration efficiency and potentially allowing unfiltered water to