| Series | 31P |
| Image | Supplier | Item Code | Short Description |
|---|---|---|---|
| | Watts Regulator Company | WAT 0240982 | 31P-31P32P-48 0240982 |
| | Watts Regulator Company | WAT 0240966 | 31P-31P32P-24 0240966 |
| | Watts Regulator Company | WAT 0240994 | 31P-31P32P-60 0240994 |
| | Watts Regulator Company | WAT 0240983 | 31P-41P42P-24 0240983 |
| | Watts Regulator Company | WAT 0241030 | 31P-31P32P-72 0241030 |
| | Watts Regulator Company | WAT 0240974 | 31P-31P32P-36 0240974 |
| | Watts Regulator Company | WAT 0240990 | 31P-41P42P-36 0240990 |
