Second Check Module
AssemblyLighter-sprung check cartridge (≥1 psid) that backs up the first check and isolates the zone from downstream backpressure. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Second Check Module
5 top-level lines as of r10234| # | 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 |