10mm pipe to 15mm trv

[tamz]

If you have no play on the pipes cutting them below the nut and soldering on a reducer takes you back to the correct length to get straight into the valve.

 

[Leo21]

If you have no play on the pipes cutting them below the nut and soldering on a reducer takes you back to the correct length to get straight into the valve.

But if they're 15 mm valves they are a straight swap. Nearly all rad valves have 1/2" bsp threads.

 

[tamz]

Trv's yes but not wheelheads

 

[Leo21]

Trv's yes but not wheelheads

I only know of mini era that aren't in recent years anyway.

 

[tamz]

Just about every make of wheelhead comes in 8 and 10mm size.
Old westco trv's had a 1/2" reducing nut with the top part of a compression reducer and old danfoss had a 1/2" internal thread with the same idea part reducer.

 

[SafeGasInstall]

Sounds lovely, where's the job?

Ruislip HA4 post code ! First time I will have to take care of this new builds .... Worked before on them changing pumps and motorised valves but this time is 14 rads to change trv and locks + new tower rail + 2 rads get replace as they have rusted but not leaking yet .... Also all rads will have manual wash in the garden !
Thanks all for your help I will end up getting 30 reducers and step up from 10 to 15 and will not waist time on them olives and reducers ! Will give update on Saturday

 

[Dannypipe]

As Tamz says' do as little to change the tails as you need to.

I did a boiler change last month, and as part of the price changed all rad valves (lock shields and TRV's) just bought reducers (compression) and changed them. (Twenty rads in a five bedroom house) total time for all rads, 1/2 a day. I should add, I am not a quick plumber.

 

[Leo21]

Hang on, I was under the impression that the valves are already 15mm. So they would already have reducers in.
Am I right in thinking this?

 

[tamz]

You might be right Leo, i see Stan said they are newbuilds and trv swaps. Probably plastic pulling out behind rad. Straight swaps and plenty play.

 

[SafeGasInstall]

No they are copper from behind and going each way just like the plastic ones ! Some of the trv are in 15mm copper going to them
locks are 10mm with intern reducer to 15mm I think

 

[tamz]

Just straight swaps Stan right onto the old reducers.