Description
Coast Spas filter bleed screw that lets trapped air out of the filter canister so the system doesn't air-lock. Purging air keeps water flowing steadily and maintains filter pressure. It suits top-load and standard housings on Coast Spas and many other brands such as Jacuzzi, Hot Spring and Sundance. It tightens by hand. Replace it when stripped or leaking.
Search: filter bleed screw, spa air release screw, hot tub filter bleeder, filter air lock fix