Double check valvefor sprinkler system

Wilkins 350AST Lead Free 304L Stainless Steel Backflow Preventer Double Check Valve Assembly With Grooved End Butterfly Valve And Integral Supervisory Switch, 4 IN, Grooved End

3/4''double check valve assembly

The Zurn Wilkins 350AST double check backflow preventer with stainless steel body provides low hazard protection with a corrosion-resistant and light weight design.

The braided pex hoses and hex adapter (if supplied) are fitted with a sealing o-ring – teflon tape / joining compound is not required for this fitting. Check the fitting to ensure the o-ring is in place and not damaged. Ensure the inlet thread and mounting surface are smooth and clean. O-ring grease may be applied to the o-ring as required. Tighten until the o-ring contacts the surface of the filter head assembly inlet and outlet, then further tightened by 0.5 turns to reach approx 3.5 nm of force to compress the o-ring and effect a seal

Australian standards call for a maximum water pressure of 500 kPa for plumbing installations. Having water pressure above 500 kPa may damage connected products including water filters and will void the product warranty. If water pressure exceeds 500 kPa a watermark approved pressure limiting valve must be installed at the same time as installing the water filter system.

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