Fuel line fittings

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So - some good news and bad news following a quick test fit here.

The M14 x 1.5 thread is actually correct for the feed joint - I was thrown off by the narrow collar until I opened the joint. See pic.

Unfortunately - the topology of this joint from Merlin isnt going to work here as the flared connection needs to clamp down hard before the T onto the gauge - otherwise it is impossible to seal correctly. The threads of the gauge would actually damage the solid pipe if clamped down fully. Likewise the other end needs to look like an inverted flare pipe so it can seal on the flexi pipe.

I loosely connected it though to get the idea in the 2nd pic... care is also needed so that the T faces the right way to attach the gauge.

That is a glycerin filled gauge and apparently you aren't supposed to keep them attached permanently so a 1/8" NPT blank plug will be required too.

I'll have to draw something up that I can share with specialist suppliers to hopefully find something off the shelf.

I'am in the same situation. Did you find any solution? Have spent some hours on the net to find an adapter but no luck..