A domestic water bypass allows an Uponor AquaSAFE™ multipurpose fire sprinkler system to operate properly even when flow-restricting devices, such as water softeners and filtration systems, are present in the home. Watch this video to learn how to properly set the pressure reducing valve on the bypass line. Uponor provides PEX tubing used in radiant floor heating and cooling, PEX plumbing and fire sprinkler systems; all with commercial and residential applications. Learn more about fire sprinkler systems: http://www.uponor-usa.com/Residential-Fire-Safety.aspx