VGB Act Anti-Entrapment Systems
Secondary safety systems required for single-drain pools
SVRS
Safety Vacuum Release System — automatically releases suction when blockage detected
ASME/ANSI A112.19.17
Suction-Limiting Vent
Tamper-resistant atmospheric vent that breaks dangerous suction
CPSC Standard
Gravity Drainage
Uses a collector tank instead of direct pump suction
CPSC Standard
Auto Pump Shut-off
Automatically stops pump when blockage is detected
CPSC Standard
Single-drain pools must have compliant covers PLUS at least one of these secondary systems