Good evening Murray,
As I’m sure you know 3/4” BSP has an outside diameter of 1.041” - I have two 3m lengths of 3/4” bore copper pipe with 1/8” wall thickness, therefore giving an outside diameter of 1”. If the pipes you wish to use have fittings soldered onto the ends then these can me made up to suit, or likewise if they need undersize BSP fittings made this can be done, alternatively you can put an expander in the end and swell them to 1.041” diameter and then put a standard BSP thread form on. I’ve done both these options on a couple of different engines and both method worked.
If you wish to buy one, or both lengths then they’re spare, I’m based in Kent so depending on where you are obviously collection or delivery would need to be arranged. If I can help in any way please send me a PM
David
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