Pentair Tank Bottom without Valve

The Pentair Tank Bottom Assembly without Valve (frequently associated with almond-colored replacement bases like Part #178578 for Clean & Clear Plus or Part #178562 for standard Clean & Clear units) serves as the primary structural pressure vessel foundation for Pentair’s premier cartridge and D.E. pool filter systems. Injection-molded from rugged, fiberglass-reinforced polypropylene, this lower tank half is engineered to endure massive hydraulic stresses, chemical exposure, and intense outdoor weathering while remaining completely corrosion-free. It features molded bulkhead ports designed to receive internal plumbing manifolds and external inlet/outlet union connections, allowing high-velocity water to circulate into the filter core without any structural flexing. By separating the main structural vessel from plumbing valves or internal cartridge elements, this standalone bottom replacement allows pool owners to fix a fractured base or worn-out bulkhead without undergoing the immense expense of purchasing a completely new multi-port valve or a whole filter unit.

The total product and shipping weight for these lower tank assemblies varies depending on the specific model size, but standard versions typically weigh between 12.0 and 20.6 pounds.