Air Gap 90mm/3.54 inches Tank Backflow Protector by Blue Mountain Co. Preheat NOTE: Also Known As Watts

NOTE: Also Known As Watts 81904010

Suggested Tank Inlet: 1" FNPT (Holes must be cut out)

Home Depot FMW

The coated smudge-free stainless steel panels and black front eliminate finger prints

NOTE: 2-way regulators will not accept a pressure gauge

Air Gap 90mm/3.54 inches Tank Backflow Protector by Blue Mountain Co. Preheat NOTE: Also Known As WattsAir Gap Overflow 90 mm Female 3. 54 inches The Air Gap by Blue Mountain Co. provides an inspection area that is easily viewed so you can determine any issues with overflow & stop pests and mosquitoes from entering your rainwater tank. It is a recommended component to include in your rain harvesting system when you have overflows that are plumbed into stormwater.