Microbore

[rustynails]

Does anyone know if its ok to replace a small double radiator plumbed in 8mm microbore with a new 500x1500 towel rail with 15mm fittings. I do not know whether the central heating system has manifolds or not, probably it does somewhere, I haven't seen them. A new combi boiler is in place. I had a plan to get a friend in to solder 2 15>8mm reducer on then bring the tails up in 15mm copper from under the floor.

any advice welcome

 

[HandySparks]

Should be fine. You won't get the same maximum flow rate as plumbing entirely in 15mm, but it should still get its fair share unless the 8mm has been kinked or blocked.

Edit: If the existing rad worked OK, the new towel rad should too.

 

[ruston]

Yes that should be OK, my last house all the heating was 8mm , from 22mm manifolds though.

 

[baileysufc]

Should be fine instead of soldering 15mm pipe in see if you can move the 8mm and use internal reducing olives there only pence plus some valves come in the box with them

 

[ruston]

Should be fine instead of soldering 15mm pipe in see if you can move the 8mm and use internal reducing olives there only pence plus some valves come in the box with them

That is an option too , you can probably buy the valves.

 

[7029 dave]

Some microbore is 10mm.

 

[ruston]

Should be fine instead of soldering 15mm pipe in see if you can move the 8mm and use internal reducing olives there only pence plus some valves come in the box with them

That is an option too , you can probably buy the valves.

Single Evolve Angled 8mm Radiator Valve - Mr Central Heating

Compression 15mm x 8mm Internal Reducer - Mr Central Heating

Hope this helps.

 

[Geordie Spark]

If you want to be really posh - like I do - then use 15mm chrome plated tube out from the valves to under the floor then connect to your microbore using a 15mm to 8mm compression reducer.

 

[Geordie Spark]

This could be useful:

http://www.trueshopping.co.uk/produ...1/53800.html?gclid=CKa4nqzWscICFSPmwgod5ZIAQg

You can solder those ones

 

[HandySparks]

If you want to be really posh - like I do - then use 15mm chrome plated tube out from the valves to under the floor then connect to your microbore using a 15mm to 8mm compression reducer.

Quite.

I'd much rather have a nice straight bit of chromed 15mm than a kinky bit of 8mm copper any day.

 

[Geordie Spark]

15mm Pipe Collars to make it all nice & shiny !!

Pipe Collars 15mm Chrome Pack of 10 | Pipe Covers | Screwfix.com

 

[HandySparks]

15mm Pipe Collars to make it all nice & shiny !!

Pipe Collars 15mm Chrome Pack of 10 | Pipe Covers | Screwfix.com

I thought those were for plumbers who haven't drilled their holes in quite the right place and had to slot them.

 

[rustynails]

All good advise, so thanks. I have used these before, does the job as well.

Wickes Radiator Pipe Snaps Chrome 1000mm Pack 3 | Wickes.co.uk

I must get my caliper out to be sure of the size, its either 8 or 10mm... I see john guest to a 15-10 speedfit reducer or they do a 15-10 reducing straight (coupler). Now I understood how the coupler works with the tightening nuts on both ends but wasnt sure how the reducer held on to the 10mm microbore...

REDUCER | John Guest Speedfit

REDUCING STRAIGHT | John Guest Speedfit

I also read somewhere that it wasnt advisable to use pushfit on microbore...best method being to solder...

heard that with a metal compression fitting these can be tightened to much squashing the pipe...

 

[Aindowsimon]

I've seen a job when a plumber had used chrome pipe and used end feed under floor board obviously he must have scrapped the chrome away first. It worked it was a existing shower . wot are you're thoughts about that Geordie ? Rough as or good idea ?

 

[Guest111]

I've seen a job when a plumber had used chrome pipe and used end feed under floor board obviously he must have scrapped the chrome away first. It worked it was a existing shower . wot are you're thoughts about that Geordie ? Rough as or good idea ?

nothing wrong with that as far as I can see,prefer endfeed to yorkshire any day.