Pentair 1-1/2" Black Bypass Disable Plug

The Pentair 75 Sq Ft Filter Center Core (part number 59053600) is a specialized internal structural component engineered exclusively for the main tank assembly of Pentair mid-sized residential cartridge filtration systems. This includes the legacy Pentair Clean & Clear, EasyClean, and Predator 75-square-foot filter models. Injection-molded from a heavy-walled, high-impact, and chemically inert polymer compound, this cylindrical, perforated core column measures approximately 14 inches in height.

Its primary structural role is to provide rigid internal stabilization inside the pressurized tank vessel. The core slips directly through the open center of the main fabric cartridge element, preventing the pleats of the large 75-square-foot filter from collapsing inward under the immense crushing force generated by high-velocity pool water circulation.

By maintaining a hollow, unyielding central chamber, the core acts as the system's primary collection conduit. It forces water to pass evenly through the exterior filter fabric before channeling the clean, debris-free water downward into the lower bulkhead assembly and back out to the pool return plumbing. This uniform hydraulic flow path allows the system to easily handle high flow rates and safely sustain standard internal operating pressures up to 50 PSI without fluid bypass or material buckling under sudden pump vibration surges.

Engineered for a permanent lifespan completely submerged in a dynamic aquatic environment, its robust plastic matrix completely resists material brittleness, stress-cracking, and corrosive breakdown from exposure to concentrated pool sanitizers like chlorine, bromine, and winterizing acid washes. Due to its rigid, hollow, lattice-style framework, this individual replacement center core carries a net product weight of approximately 1.20 to 1.50 pounds (about 19.2 to 24.0 ounces).