| Diameter | 21 in |
| Image | Supplier | Item Code | Short Description |
|---|---|---|---|
| | Watts Regulator Company | WAT 0066614 | ETSX-160 0066614 |
| | Watts Regulator Company | WAT 7100005 | PWM15121G10 7100005 |
| | Watts Regulator Company | WAT 0066613 | ETSX-110 0066613 |
| | Watts Regulator Company | WAT 0066612 | ETSX-90 0066612 |
| | Watts Regulator Company | WAT 7100014 | PWC15121G10 7100014 |
