Watts 774-NRS 4 - Part of the 774 Series Strip Drian and a reversible clamping collar

and a reversible clamping collar

elegant look

UPC - 098268606720

cast iron roof drain features a compression seal extension assembly

Sump receiver

Watts 774-NRS 4 - Part of the 774 Series Strip Drian and a reversible clamping collarThis lead free double check valve assembly backflow preventer, 4 inch, is designed to prevent the reverse flow of contaminated water of non potable quality from being pumped or siphoned into the potable water supply due to backsiphonage and or backpressure in accordance with national plumbing codes and water authority requirements. It is ideal for protection at cross connections identified as non health hazard applications and from other contaminants