Hayward STAR-CLEAR PLUS LOCKING KNOB

The Hayward Star-Clear Plus Locking Knob is a critical specialized fastener designed to secure the filter head assembly to the main tank body on Star-Clear Plus series cartridge filters, such as the C751, C900, and C1200 models. It is injection-molded from a high-impact, UV-stabilized reinforced thermoplastic, featuring an ergonomic, oversized tri-lobe or star-shaped design that allows the user to apply significant manual torque without the need for additional tools. This knob functions as the primary mechanical tensioner for the internal tie rod, pulling the filter head downward to compress the main tank O-ring and create a vacuum-tight, pressurized seal. Its robust construction ensures it can withstand the constant hydraulic vibrations and environmental stressors typical of an outdoor pool pad while remaining easy to rotate for routine maintenance and filter cleaning. For shipping and logistical purposes, the estimated weight of the Hayward Star-Clear Plus Locking Knob is approximately 1.2 pounds in its retail packaging, while the actual weight of the molded knob and its internal threaded components is roughly 0.9 pounds.