Pentair Black Manual Air Relief Assembly | 273550Z Blue Square Light Accessories and Niches This vac lock is used

This vac lock is used for closing off suction vacuum lines for automatic cleaners

This comes with five in a pack

Reliable Chemical Feed Pump for Precise Pool Automation

then use appropriate tools to secure fittings—do not overtighten

Pentair Black Manual Air Relief Assembly | 273550Z Blue Square Light Accessories and Niches This vac lock is usedPentair Black Manual Air Relief Assembly 273550Z OEM Pentair manual air relief assembly. Releases trapped air to maintain pressure and efficient filtration. Features OEM replacement for Pentair FNS, Nautilus Plus, and SMBW 4000 series filters. Manual air relief valve removes trapped air from filter tank. Integrated pressure gauge for system monitoring. Improves filtration efficiency and startup performance. Durable construction for long service life.