4¾” 13swg copper tubing?

4¾” 13swg copper tubing?

This topic has 3 replies, 4 voices, and was last updated 2 August 2026 at 15:49 by noel shelley.

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2 August 2026 at 13:41 #859123
martynt50
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@martynt50
I have been searching for 4¾’ copper tubing (C106) for a boiler for my Evening Star build for as long as I can remember (bit of an exaggeration but you know what I mean). Living in The Netherlands I’ve searched over here for 120mm tube but also with nothing available. I once found something on Reeves’ site but only 12″ long which is 1½’ too short. I will be visiting the UK end of the month and could get it shipped to the address of my cousin. So, if anybody knows of a supplier with any stock, or if anybody has a length of about 14″ I would love to hear about it. LBSC plans specify 13swg but 10swg which I have seen would be acceptable at a pinch.

Thanks, Martyn
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2 August 2026 at 15:01 #859126
Speedy Builder5
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@speedybuilder5
What thickness? Its only 2.5mm, but you could ask?

https://www.grosclaude-robin.fr/tube-industriel-cuivre/

13 SWG 2.37mm
2 August 2026 at 15:20 #859129
John Hinkley
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@johnhinkley26699
M-Machine metals have 4.25 inch x 10 swg listed in their catalogue M-machine metals.

John
2 August 2026 at 15:49 #859132
noel shelley
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@noelshelley55608
Hi Martyn, 120 x 2.5 is a known size,slightly up on 13g, or the next up 120 x 2,65. As for 10g, 3mm though slightly thinner will do for the fire box area and tube plates. Before doing any work on the boiler I would check with your boiler inspector on any changes to the published design. Good luck. Noel.
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