Watts 957Z-NRS 8 - Part of the 957 Series American Wick Drain A recommend 1-2” should be

A recommend 1-2” should be left above the surface to catch any surface roots that attempt to cross the barrier at the surface

Features Iron body triple coated with special corrosion preventative materials that is superior to hot dip galvanizing

UPC - 098268651256

UPC - 098268520118

flanged end connections and stainless steel diaphragm

Watts 957Z-NRS 8 - Part of the 957 Series American Wick Drain A recommend 1-2” should beThis 8 inch reduced pressure zone assembly backflow preventer helps prevent the reverse flow of fire protection substances and 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. This extremely compact and lighter than a traditional designed assembly is approved for horizontal Z pattern installation