With blind flange.
Isolating fittings are required when installed in enamelled storage water heaters.
| Type | Flange DN | Thread | Installed length [mm] | Heating surface [m2] | Order no. |
| RWT 1 | – | G 1/2″ | 490 | 1 | 418940 |
| RWT 1 | 110 | G 1/2″ | 490 | 1 | 419941 |
| RWT 1 | 205 | G 1/2″ | 490 | 1 | 419943 |
| RWT 1,8 | – | G 3/4″ | 470 | 1,8 | 418941 |
| RWT 1,8 | 205 | G 3/4″ | 470 | 1,8 | 419945 |
| RWT 2,3 | – | G 3/4″ | 550 | 2,3 | 418942 |
| RWT 2,3 | 205 | G 3/4″ | 550 | 2,3 | 419947 |
| RWT 3 | – | G 3/4″ | 490 | 3 | 418943 |
| RWT 3 | 205 | G 3/4″ | 490 | 3 | 419948 |
| RWT 4,6 | – | G 1″ | 790 | 4,6 | 418944 |
| RWT 4,6 | 205 | G 1″ | 790 | 4,6 | 419949 |