Another question about replacing cold header tank Vent pipe?

[Yarn]

Hi, what do I do about the vent pipe from the cylineder? The old tank had no lid so the pipe fed in from the top. It came up above tank then had a 180 bend.

Modern tanks seem to be completly sealed - what do i do please?

 

[kevplumb]

you cut a hole in the lid supplied in the bylaw kit and fit the rubber grommet(supplied) on the pipe

which you will purchase with the new tank

 

[JayJay1978]

Polytanks are excellent.

http://www.screwfix.com/prods/10500...Tanks/Cold-Water-Tank-25gal-690-x-515-x-520mm

 

[Yarn]

Yeh probably going to buy from SF.

I want to move the tank slightly. Is it ok if I cut the copper vent pipe, and use a bit of speedfit to extend the run, but keep the copper 180 on the end? Not sure if heat is an issue. I do have a resettable immersion.