Best way of joining 1.25 copper to 28mm copper

[Adrian B]

I have recently moved into a new home (old house) where the pipe from the boiler to the cylinder (indirect vented) is 1.25 inches.
I need to change the cylinder and was wondering how best to join 1.25mm copper to 28mm copper for the new tank.
Any advice would be gratefully received

 

[ShaunCorbs]

35mm - 28mm just make sure it’s copper not steel

 

[Deleted member 120897]

Are you sure you have the sizes right?

 

[Adrian B]

35mm - 28mm just make sure it’s copper not steel

Shaun, definitely copper. Will a 35mm Compression or Yorkshire fit a 1.25mm pipe ? I think the pipework is about 40 years old at a guess.

 

[ShaunCorbs]

Easy to tell will measure 35mm / if you find a fitting will be listed / written on it on the nut front face

 

[Adrian B]

This may help. 3 pictures with dimensions in cm and inches on a digital caliper. it has paint on it.... so its going to be a fraction smaller

 

[ShaunCorbs]

Would get this just incase

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JTM Compression Straight Coupling Connector | Plumbing Superstore®

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Just make sure the new cylinder is suitable for gravity hot water heating side most arnt

 

[Adrian B]

Shaun, hopefully this is OK ?
Gledhill Envirofoam Copper Vented 1500mm x 450mm 10M WH Indirect Cylinder

 

[ShaunCorbs]

Best to email gledhill if your not s or y plan

 

[Adrian B]

Shaun, I wanted to thank you for your advice.

I rung the supplier of the cylinder this am and asked them to ensure it had a gravity fed coil.
They called gledhill and they changed the order. They will supply this with a gravity coil and its only £18 extra.
If it was not for your help, I would have probably had to send the cylinder back and that would have been painful.

Thx once again

Adrian