Zoeller 30-0151 — 2″ UniCheck® Cast-Iron Check Valve | Heavy-Duty Backflow Protection 2inch / 4 inch The five-zone cam leaves one

The five-zone cam leaves one physical outlet outside the operating rotation

1-inch manual anti-siphon valve

after 500 hours of use

000 BTU Natural Gas Exterior Tankless Water Heater

Zoeller 30-0151 — 2″ UniCheck® Cast-Iron Check Valve | Heavy-Duty Backflow Protection 2inch / 4 inch The five-zone cam leaves oneZoeller 30 0151 2 UniCheck Cast Iron Check Valve The Zoeller UniCheck 2 Cast Iron Check Valve (Model 30 0151) provides heavy duty backflow protection for sump and sewage pump systems. Its durable cast iron body and full flow internal design help reduce restriction and system noise while guarding your pump and basin from reverse flow. Key Features & Benefits Backflow prevention to protect pumps and basins from reverse drainage Cast iron construction