Pipe size to Bath

[sacko]

Hi, two thing...

(1)
I have just removed a shower cubicle and am replacing it with a bath, however the water feed for both hot and cold are in 15mm, is it ok to expand the pipework to 22mm for both to fit onto the bath taps. I have a great water pressure running off a Boilermate 2 system, so I and am thinking it wouldn't effect the pressure.

(2) my central heating system is run off the Boilermate 2, and I have a couple of Rads upstairs that are hot at the top but only luke warm at the bottom any Ideas how I can remedy that??

Regards John

 

[scaby]

expanding your pipes to 22 is fine ,you can buy three quarter to fifteen mil tap connectors to save on the 22 just run it in fifteen,your rads sound like they are sludged up