First Check Module
AssemblySpring-loaded check cartridge holding a minimum 5 psi differential across the inlet, the larger of the two check springs. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for First Check Module
5 top-level lines as of r10233| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Check Cartridge Frame | backflow-preventer-check-frame | 1× | 1 | · | part |
| 2 | Check Disc | backflow-preventer-check-disc | 1× | 1 | · | part |
| 3 | Seat Ring | backflow-preventer-seat-ring | 1× | 1 | · | part |
| 4 | Coil Spring | coil-spring | 1× | 1 | · | part |
| 5 | O-Ring Set | oring-set | 1× | 1 | · | part |