Backwater Prevention Valve
AssemblyOptional check valve preventing sewer gases and floodwater from backing up into roof drains. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Backwater Prevention Valve
3 top-level lines as of r144573| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Check Valve Body | roof-drain-system-check-valve-body | 1× | 1 | · | part |
| 2 | Check Poppet | roof-drain-system-check-poppet | 1× | 1 | · | part |
| 3 | Cleanout Access | roof-drain-system-access-cleanout | 1× | 1 | · | part |