Pipework for downstairs radiators on new builds

[Mgrant]

Ok, is there a way of first fixing the downstairs rads in 15mm (without loads of boxing ins) if the ground floor is a solid floor so can't do one drop then go under the floor to feed the rads.

 

[ShaunCorbs]

Ok, is there a way of first fixing the downstairs rads in 15mm (without loads of boxing ins) if the ground floor is a solid floor so can't do one drop then go under the floor to feed the rads.

yea but more work chase the pipes in and use either plastic or 15 mm coated copper

 

[Mgrant]

thought so 15mm un-chased in is too much to dot and dab over?

 

[missplumb]

we used to do 10mm downstairs and 8mm upstairs off manifolds on the landing, if your going to go behind dot and dab, do it before they put the boards on, its so much easier than chasing and chiselling the dabs then replastering!!

 

[ShaunCorbs]

we used to do 10mm downstairs and 8mm upstairs off manifolds on the landing, if your going to go behind dot and dab, do it before they put the boards on, its so much easier than chasing and chiselling the dabs then replastering!!

i like the word used to no one should be using 8mm these days for heating circuits/ runs to rads

 

[ShaunCorbs]

thought so 15mm un-chased in is too much to dot and dab over?

yes but depends how bad your dot and dabber is

 

[stevetheplumber]

i like the word used to no one should be using 8mm these days for heating circuits/ runs to rads

theres no reason ytou couldnt use 8mm but its a lot of trouble using two sizes just do it all in 10mm of manifolds

 

[ShaunCorbs]

theres no reason ytou couldnt use 8mm but its a lot of trouble using two sizes just do it all in 10mm of manifolds

yea them horrible 8-10 trv adapters

 

[Mgrant]

So if it's done all in 10mm copper how do you bring the pipes out to the radiators? Sorry for all the questions have usually just fed the first floor rads in 15 from below, as down stairs has had underfloor heating.

 

[ShaunCorbs]

So if it's done all in 10mm copper how do you bring the pipes out to the radiators? Sorry for all the questions have usually just fed the first floor rads in 15 from below, as down stairs has had underfloor heating.

if its upstairs then through the chip straight into valve, down stairs hole in plasterboard with elbow on 10mm pipe behind the plasterboard to get it as tight as possible, of-course all pressure tested before hand, but you never know with spreaders if you pipes are going to be where you left them