Vac-Alert VA200L Anti-Entrapment Pool Safety Vacuum Release System for Stopping Accidents in Milliseconds, has a 4.4 rating out of 5.0.
Vac-Alert reacts in milliseconds, stopping accidents before they happen
Designed for suction lift applications only
Vac-Alert easily plumbs in line on the suction side of existing filtration equipment
Triggers valve pistons to lock, allowing air to enter system and releases the vacuum on main drain
Utilizes a check valve assembly, 3.5 pound spring, poppet disc and a one-way vented poppet