Backflow Preventers

Caleffi 573002A AutoFill Combo 1/2 inch Female Automatic Water Boiler Feed with Backflow Preventer

Parts

Viessmann 7498 530 Model 120/80 Low Loss Header with Insulation

Viessmann 7373 253 Double Pipe Vent Adapter

Pipes

4 X 20 Schedule 40 PVC DWV Pipe

4 X 10 Schedule 40 PVC DWV Pipe

4 X 20 Schedule 80 CPVC Pipe

Fuel Pipe Fittings

Duravent 4PPS-AD 4 inch Polypropylene Appliance Adapter for PVC Coupler

Duravent PPS-VSM-AD Appliance Adapter for Viessmann