3/4" BSP onboard vs Truma Ultraflow socket: specs compared
Updated 05 September 2026.
8
specs differ
3/4" BSP onboard and Truma Ultraflow socket differ on 8 specs: thread, appliance thread, push-fit adaptor, seals on, system, accepts.
| Spec | 3/4" BSP onboard | Truma Ultraflow socket |
|---|---|---|
| Thread | 3/4 inch BSP parallel (external mains inlet) | |
| Appliance thread | 1/2 inch BSP for taps and heaters | |
| Push-fit adaptor | 3/8 inch BSP to 12 mm push-fit | |
| Seals on | a washer at the face (parallel BSP) | |
| System | Truma Ultraflow submersible-pump inlet socket | |
| Accepts | Whale Watermaster and Truma connectors | |
| Onboard thread | 3/4 inch BSP mains inlet | |
| Note | Crystal II sockets need adapter EM9407 |
Questions and answers
How do 3/4" BSP onboard and Truma Ultraflow socket compare?
3/4" BSP onboard and Truma Ultraflow socket differ on 8 specs: thread, appliance thread, push-fit adaptor, seals on, system, accepts.