Relief Valves

Apollo 10-407-05 Bronze 3/4 inch Male Inlet x 3/4 inch Female Outlet 30 PSIG Pressure Relief Valve

Backflow Preventers

Watts B911SM3 0386462 1/2 inch Sweat Union Inlet x 1/2 inch Female Outlet Brass Body Automatic Water Boiler Feed with Backflow Preventer

Parts

Viessmann Manufacturing® 7836177 Gasket, 187 x 5.5 mm Size

Viessmann 7828 718 Ignition and Ionization Electrode Block

Viessmann Manufacturing® 7826516 Ignition Electrode

Viessmann Manufacturing® 7829798 Ignition Electrode, For Use With: WB2B / B2HA

Viessmann Manufacturing® 7834235 Ionization Electrode

Air Vents

Taco 400-4 Hy-Vent 1/8 inch Male Water Boiler Float Type Air Vent

Amtrol® 700-30 Float Air Vent, 1/8 in Inlet x 1/8 in Outlet, 150 psi, 230 deg F