And now for the plumbing !!!

[Staffbull]

Hello all, I would appreciate some help on how to route the microbore for the two new rads in the extension. the pipes need to go through the joists, so is it a case of drilling or notching? Notching would be the easiest way to run the pipe but I want to do it correctly.

Also could you please confirm from what i have read in the building regs regards drilling holes in joists. holes to be drilled in a zone from .25 - .40 X lenght of joist and holes to be spaced 3X diameter of hole apart. and no more than 1/6 diameter of width of joist.

many thanks once again.

[John Stumbles]

I always prefer to drill as the pipe's out of the way of wayward floor nails, but if you do that be careful not to bend the pipe back & forth too much or it'll harden up. If you're using microbore I'd advise getting an external bending spring rather than trying to bend by hand, and using solder fittings for tight bends etc. I also prefer to solder a 15mm x 10mm or 8mm fitting reducer onto the end of the pipe and go into a 15mm rad valve rather than using a 10 or 8mm valve or a compression reducer, since it's very easy to overtighten the olive onto the very soft microbore pipe after which you'll never get a good seal.

Absolutely, and if you look in any house you'll find all holes and notches made exactly to the regulations without exception :-)

[Staffbull]

Cheers, dilling it is !!!