Pentair Closure 8-1/2 in. | Triton C-3 & TR Series Sand Filter | 154575Z Covers & Cover Accessories Oversized mattress is 3′ wide

Oversized mattress is 3′ wide by 6′ long with a built-in pillow on both sides

directing water flow from the impeller to the discharge port to maintain peak hydraulic efficiency

Reemay 2033 filtration media and a 2" male-thread (MPT) bottom connection

or actuator slippage — preventing the valve from holding its set position reliably

Pentair Closure 8-1/2 in. | Triton C-3 & TR Series Sand Filter | 154575Z Covers & Cover Accessories Oversized mattress is 3′ wideThe Pentair Closure 8 1 2 in. (154575Z) is the OEM replacement closure for the Triton C 3 and TR Series fiberglass sand filters, sized at 8 1 2 inches. IMPORTANT: DATE OF MANUFACTURE QUALIFIER This closure (154575Z) fits Triton C 3 filters manufactured before March 1997. If your Triton C 3 was manufactured on or after March 1997, verify the part number on your existing closure before ordering a different closure may be required for later production