overflow pipe standard size

[flutterbye]

Hi

I'm in the middle of replacing my old cold water tank in the loft. I've just noticed (late as usual!) that the existing plastic overflow pipe needs extending but the pipe size looks about 24mm (measuring the external diameter with an adjustable spanner).

Most of the pipe I see for sale says 21.5mm. Do I need some special coupling connector or do I need to replace the entire length of pipe?

Any replies would be mot gratefully received including taking the p*** due to my advanced pipe calibration technique.

 

[chr15]

Hi

I'm in the middle of replacing my old cold water tank in the loft. I've just noticed (late as usual!) that the existing plastic overflow pipe needs extending but the pipe size looks about 24mm (measuring the external diameter with an adjustable spanner).

Most of the pipe I see for sale says 21.5mm. Do I need some special coupling connector or do I need to replace the entire length of pipe?

Any replies would be mot gratefully received including taking the p*** due to my advanced pipe calibration technique.

You could try a speedfit 22mm straight connector, i know that will tighten onto the 21.5 overflow and you could be up to a couple of mm out with your advanced measuring method so if you're in luck the other end of overflow you have might just push into it as well-with a little help from a file