| 1 | 31-252-1086 | Air Relief Screen, Waterco/Baker Hydro HRV/Micron, with Plug | W04190 |
| 2 | 90-423-1215 | Square Ring, 7-7/8" ID, 8-3/16" OD, Generic, O-215 | |
| 3 | 31-252-1000 | Tank Lid, Waterco Baker Hydro HRV | 6220204 |
| 6 | 31-252-1060 | Pressure Gauge, Waterco Baker Hydro, 0-50psi, Bottom Mount | 30B3000 |
| 7 | Discontinued | Air Relief Kit, Waterco Baker Hydro Ultra Mite | 17B1020 |
| 9 | Discontinued | Nut, Waterco HRV, 5/16-18 | 00B0007 |
| 10 | 31-252-1008 | Diffuser, Waterco Baker Hydro HRV | 15B0043 |
| 12 | 31-252-1127 | Bulkhead Assembly, Waterco Micron SM, 2" | WCW04006BLK |
| 12A | Discontinued | Gasket, Waterco Micron SM, 2", Bulkhead | WCW02080 |
| 13 | 89-252-1110 | Half Union, 2", with O-Ring | 634024BLK |
| 13A | 35-252-1181 | O-Ring, Waterco HydroStorm/Plus, Union | W02280 |
| 14 | 31-252-1228 | Collector Assembly, Waterco HRV 24 | HRV24-COL |
| 15 | 31-252-1108 | Lateral, Waterco Baker Hydro/Micron/Thermoplastic, 4-1/2" | WCW02112 |
| 17 | 31-252-1025 | Lateral, Waterco Baker Hydro HRV 24, Chicken-Foot Style | 6209227 |
| 18 | 31-252-1106 | Lateral, Waterco Baker Hydro/Micron/Thermoplastic, 3-1/2" | WCW02111 |
| 19 | 31-252-1120 | Drain Assembly, Waterco Micron SM/Thermoplastic | W02026BLK |
