Hayward STAR-CLEAR + 175 SQ FT LOCKING KNOB

the Hayward Star-Clear Plus 175 Square Foot Locking Knob is a heavy-duty, ergonomically designed fastener specifically engineered for the C1750 series cartridge filter systems. This component serves as the primary manual securing mechanism that holds the filter head firmly to the filter tank, ensuring the internal O-ring is properly compressed to maintain a high-pressure, watertight seal. Manufactured from a high-impact, UV-stabilized reinforced thermoplastic, it is built to withstand the constant outdoor exposure and chemical environment of a pool equipment pad without becoming brittle or stripping its internal threads. Its oversized, textured grip allows pool owners and service technicians to easily hand-tighten or loosen the assembly without the need for specialized tools, facilitating quick access to the filter cartridge for routine maintenance. The robust design includes internal metal threading or a specialized heavy-duty bolt interface to handle the mechanical stress of a pressurized filtration cycle. For shipping and logistical purposes, the estimated weight of the Hayward C1750 Locking Knob is approximately 1.2 pounds in its retail packaging, while the actual weight of the molded knob itself is roughly 0.9 pounds.