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The most broadly compatible parts
2
3/4" BSP parallel (G3/4 / BSPP) fits 2 of the combinations we checked directly, more than any other of the 12 parts in the dataset.
Which part fits the most setups?
3/4" BSP parallel (G3/4 / BSPP) is the most broadly compatible, fitting 2 combinations directly (18% of the 11 we checked for it). The full ranking is below.
| # | Parts | Direct fits | Combinations checked | Direct-fit rate |
|---|---|---|---|---|
| 1 | 3/4" BSP parallel (G3/4 / BSPP) | 2 | 11 | 18% |
| 2 | 25 mm pond hosetail | 2 | 2 | 100% |
| 3 | 1" BSP parallel (G1 / BSPP) | 1 | 2 | 50% |
| 4 | Caravan onboard 3/4 BSP water fitting | 1 | 2 | 50% |
| 5 | 32 mm pond hosetail | 1 | 1 | 100% |
| 6 | 20 mm pond hosetail | 1 | 1 | 100% |
| 7 | Jubilee clip size 1A | 1 | 1 | 100% |
| 8 | Jubilee clip size 1X | 1 | 1 | 100% |
| 9 | 40 mm pond hosetail | 1 | 1 | 100% |
| 10 | Jubilee clip size 2A | 1 | 1 | 100% |
| 11 | Whale Watermaster caravan water inlet | 1 | 1 | 100% |
| 12 | Truma Ultraflow caravan water inlet | 1 | 1 | 100% |
How this is worked out
For every part we counted the compatibility combinations that resolve to a direct fit (no adapter needed) across every combination in the reference set, and ranked by that count. The direct-fit rate is direct fits divided by all combinations checked for that item.
Data as of 2026-09-05.
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