Tube runs for injectors

[Michael CallaghanParticipant @michaelcallaghan68621]

Well I am almost at the stage of thinking about injectors. The twin clack valve is at the top of the boiler around 3 inches back from the smokebox. The tubes need to run down the sides of the boiler to the running boards. And here things get tricky. The model by the way is a 5inch gauge royal Scot. My only option I think is to fit a 90 degree bend which will be fit nicely behind the name plate and then run the tubes along the running boards to another 90 degree bend which will take the tube down to a 3rd bend and into the injector. My fear is that 90 degree bends are not a great idea within injector tubing. But I can’t imagine any other path. It’s very busy between the frames and then I would still need 90 degree bends to clear the firebox grate. As anyone got 90 degree bends in their injector pipe work and are you ok with it. Thanks

[BazParticipant @baz89810]

Shouldn’t have problems with 90 degree bends, keep the bends as big a radius as possible. The problem comes when using elbows.

[Michael CallaghanParticipant @michaelcallaghan68621]

Thanks, looks like I need to make a bending tool now

[noel shelleyParticipant @noelshelley55608]

You do not mention what size of pipe and though I expect 8mm to be way to large, 8mm end fed swept elbows are available at about £4 for 10. Noel.

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