Connect M22 x 1.5 pressure-washer, 15 mm bore to Garden Hose Thread (GHT / NH)
How to join M22 x 1.5 (15 mm) and 3/4"-11.5NH, and what stops it leaking.
Needs adapter
End A
M22 x 1.5 pressure-washer, 15 mm bore (M22 x 1.5 (15 mm))
Seals on O-ring on the 15 mm spigot
via adapter
End B
Garden Hose Thread (GHT / NH) (3/4"-11.5NH)
Seals on flat washer or O-ring in the female coupling
Adapter neededM22 to garden hose (GHT) pressure-washer adapter
Not a direct fit. Joining M22 x 1.5 pressure-washer, 15 mm bore to Garden Hose Thread (GHT / NH) needs a M22 to garden hose (GHT) pressure-washer adapter.
The adapter to buy
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Feeding a pressure washer from a garden hose, or fitting hose accessories to an M22 outlet, uses an M22-to-GHT adapter. Confirm whether your machine is 14 mm or 15 mm bore first, because the adapter O-ring must match.
Match the bore before buying. An M22 adapter that fits the thread but has the wrong bore O-ring will still weep.
Related connections
M22 x 1.5 pressure-washer, 15 mm boreM22 x 1.5 (15 mm)Garden Hose Thread (GHT / NH)3/4"-11.5NHGarden Hose Thread (GHT / NH) to 3/4" BSP parallel (G3/4 / BSPP)adapterGarden Hose Thread (GHT / NH) to 1/2" BSP parallel (G1/2 / BSPP)adapterMale aerator thread (M22 x 1 / 15/16"-27) to Garden Hose Thread (GHT / NH)adapterM22 x 1.5 pressure-washer, 14 mm bore to M22 x 1.5 pressure-washer, 15 mm boreadapter
Sources: Pressure-washer M22 14mm vs 15mm fitting data (M MINGLE spec) · ASME B1.20.7 (garden hose / GHT / NH threads) · NPSH / NH / NHR hose coupling thread table, Fittings.space