Tankless Water Heater Service Valve, Sub Brand: Isolator E-X-P E2, Series: 4444W, Type: Tankless, Nominal Size: 3/4 inch, Connection: FIP Union x ASTM F1807 PEX, Body Material: Brass, Seal Material: PTFE Stem, EPDM O-Ring, Seat Material: PTFE, Pressure Rating: 400 CWP Hose Drain, 150 psi Pressure Relief Valve, Size: 3/4 inch Pipe, Length: 8.86 inch, Width: 6-1/2 inch, Height: 3.74 inch, For Use With: Tankless Water Heater, Includes: (2) Heavy Duty Forged Brass Ball Valves, Full Port Main Flow Channel, Large Drain Port Outlets, Color Coded Aluminum Handles, (3) 3/4 in FNPT Union x PEX 150 psi 20 kBTU Pressure Relief Valves, Capacity: 500000 BTUH, Valve Style: Ball, Standards/Approvals: Lead Free, Certified to NSF/ANSI 61 &and 372, ASTM F1807