15mm fittings on 8mm microbore CH?

ed110220

I need to replace a bathroom radiator with a heated towel rail type radiator and also put in a radiator in a room that doesn't have one at present. The central heating system uses 8mm microbore pipes as there is no room for standard size pipework between the downstairs ceilings and first floor steel beams. At the moment the bathroom radiator is an old type where the inlet and outlet are at the same corner so the pipework needs moving slightly.

Is it possible or advisable to use 15mm pipe for the last part of the pipe run between the floor and the radiator? I was thinking it may make it easier. I also hate the look of exposed 8mm pipework as it bends and doesn't stay straight and generally looks untidy.

I got the idea from my neighbours who seem to have done this with some of their radiators (also microbore system).

phill99

You just need an 8mm x 15mm reducer. Fairly straightforward.

ed110220

phill99 wrote: »

You just need an 8mm x 15mm reducer. Fairly straightforward.

Thanks, that was what I was thinking of. I was just wondering whether it would disrupt the flow pattern significantly, but I guess not as the 15mm pipe at the end of the 8mm would be fairly short.

wealdroam

ed110220 wrote: »

Is it possible or advisable to use 15mm pipe for the last part of the pipe run between the floor and the radiator?

Perfectly acceptable.

27col

I converted to 15mm from micro bore years ago when I repositioned the bathroom rad. No problem at all, you just need to buy the correct reducers.

keystone

plumb1_2

keystone wrote: »

Oh how i hate these bullet type reducers, the 3 part ones are the best imo, but hard to get hold of now.

keystone

plumb1 wrote: »

Oh how i hate these bullet type reducers, the 3 part ones are the best imo, but hard to get hold of now.

Well theres always these:



or if feeling truly adventurous:



:D

Cheers

plumb1_2

keystone wrote: »

Well theres always these:



or if feeling truly adventurous:



:D

Cheers

A short endfeed is my pref.:cool:

keystone

plumb1 wrote: »

A short endfeed is my pref.:cool:

but I doubt OP would be impressed if such was recommended to them.

Cheers

plumb1_2

keystone wrote: »

but I doubt OP would be impressed if such was recommended to them.

Cheers

R , but not recommending to the OP, if i was? i would recommend he used 15mm chrome plated pipe into the rad valves, then used a compression reducer under the floor, or somewhere not visable