Premium isolation (ISV) valve kit for the plumbing trade professionals. Lead and certified safe for potable drinking water. Universal fit for flushing tankless water heaters; with all brands including Rheem, Rinnai, Navien, Noritz, Takagi, and others (isolation) valve kit includes (1) Blue/Cold 3/4" Sweat x FNPT (CxF), (1) Red/Hot 3/4" Sweat x FNPT (CxF) Also includes 3/4" FNPT Pressure Valve (PRV) Lead brass, safe for potable drinnking water Professional , approved for indoor and outdoor We are proudly owned and operated, all our services are provided in the USA