Webstone 44443WPR 3/4-Inch IPS Isolator EXP E2 Tankless Water Heater Service Valve Kit with Clean Brass Construction N/A Imported Lead Free - Meets all federal & state standards for lead levels in drinking water system components. Size is 3/4in Tankless Water Heater Service Valves 1 per carton - 10 per case - Individually Priced & Sold Includes a residential pressure relief valve (150 PSI/200,000 BTU) 500 WOG 4444 series - IPS Union x IPS Compact version of Webstone's original Isolator EXP Certified to NSF/ANSI 61-8 and comply with the lead requirements of AB1953 and Annex G