Radiator Pipe Run

eamon11

hello folks,

doing a complete re-plumb on a house soon. Old house and will have radiators. Thinking of using qualpex underground and copper above ground. It has been suggested to me, in order to avoid joints to use complete runs of pipe to each individual radiator, rather than running a large loop and T-ing off to each radiator. This will obviously mean a lot more pipe.
So, my question is, would there be a lot more water needed? and maybe a bigger heating capacity?

Thanks in advance

eamon11

130 views and no reply. Anyone?

Wearb

eamon11 wrote: »

hello folks,

doing a complete re-plumb on a house soon. Old house and will have radiators. Thinking of using qualpex underground and copper above ground. It has been suggested to me, in order to avoid joints to use complete runs of pipe to each individual radiator, rather than running a large loop and T-ing off to each radiator. This will obviously mean a lot more pipe.
So, my question is, would there be a lot more water needed? and maybe a bigger heating capacity?

Thanks in advance

No

anthonyos

Get someone to do it because you are away of the mark on what and how to do the work and you haven't even started

GreeBo

Why are you mixing qualpex and copper?

Whats the concern with joints? You are going to have 6 at each rad anyway.


Run 3/4 flow return and 1/2 to each tail.
If its going to be in uninsulated areas (underground?) then use pipe insulation.

scudo2

Wearb wrote: »

No

Who's been a naughty boy this year ?






Santa forget you ?

Wearb

scudo2 wrote: »

Who's been a naughty boy this year ?






Santa forget you ?

No SCUDO..... he didn't forget me......................................he brought me a nice lump of coal :pac::pac::pac::pac::pac::pac:

Dtp1979

eamon11 wrote: »

hello folks,

doing a complete re-plumb on a house soon. Old house and will have radiators. Thinking of using qualpex underground and copper above ground. It has been suggested to me, in order to avoid joints to use complete runs of pipe to each individual radiator, rather than running a large loop and T-ing off to each radiator. This will obviously mean a lot more pipe.
So, my question is, would there be a lot more water needed? and maybe a bigger heating capacity?

Thanks in advance

Different plumbers have different preferences in piping. If done correctly the joints won't leak. Yes there will be less water to heat if you use tee's underground than a manifold system.

sky6

There's a lot more information required to make a properly informed decision. Size of House type of House Bungalow two story, level of insulation Are you in a Hard Water area. Etc. You really need the assistance of a qualified heating engineer.

eamon11

DTP 1979, thanks man, you are the only one who answered.

scudo2

eamon11 wrote: »

DTP 1979, thanks man, you are the only one who answered.

GreeBo & Sky also did.

nmacc

Using a manifold to distribute the water is very common on the continent. (They do this for the H & C as well)
Makes it much easier to balance the system and, if you use an underfloor manifold, you can see the flow rate through each radiator and set it from one spot.

If you were so inclined you could put a thermostat in each room and use underfloor actuators at the manifold to control the heat to each room individually, which is kinda neat.

I did my own house that way, but it is a lot of work. You'll need a lot more pipe and insulation and more labour is required, so it will cost more. My main concern would be whether there is enough room for the pipes. I had great plans to over-insulate my piping, but that was before we started to lay the pipes in place. It proved very difficult to fit them all.

strabow

Heres a tip. If you are going to use qualpex under the floor mske sure it can never leak. All cowboy jobs are done in qualpex where you cant see the pipes. Its cheaper on both matierials and labour. The thing with qualpex is that it is easiely manipulated into difficult to get to places which is good. The bad part is that if you exert pressure in the wrong place ie to close to a joint the qualpex can bend at the nut and leak. This happened in 12 places in my ceilings. In repairing the cockups from that plumber i redid the joints by using ptfe tape on both the brass joints thread AND around the brass ring. This will ensure a tighter seal. But you are better off creating a loop as you say and teeing off to each rad. it will help your boiler work more efficiently.

Dtp1979

Op don't put tape around the threads on a compression. It's absolutely useless and any time I see it done I know an amature has been here before me.

agusta

strabow wrote: »

Heres a tip. If you are going to use qualpex under the floor mske sure it can never leak. All cowboy jobs are done in qualpex where you cant see the pipes. Its cheaper on both matierials and labour. The thing with qualpex is that it is easiely manipulated into difficult to get to places which is good. The bad part is that if you exert pressure in the wrong place ie to close to a joint the qualpex can bend at the nut and leak. This happened in 12 places in my ceilings. In repairing the cockups from that plumber i redid the joints by using ptfe tape on both the brass joints thread AND around the brass ring. This will ensure a tighter seal. But you are better off creating a loop as you say and teeing off to each rad. it will help your boiler work more efficiently.

Did you use inserts on the joints,what your saying does not cause them to leak

strabow

agusta wrote: »

Did you use inserts on the joints,what your saying does not cause them to leak

Yes there were inserts in place. Believe me the mess of the pipework when i opened the ceilings was disgusting. If you put pressure on the joint by forcing a bend through a joist it will leak not today or tomorrow but tomorrows tomorrow.

strabow

Dtp1979 wrote: »

Op don't put tape around the threads on a compression. It's absolutely useless and any time I see it done I know an amature has been here before me.

I was not refering to a compression fitting. As compression fittings dont have threads.

kerryplumber

strabow wrote: »

I was not refering to a compression fitting. As compression fittings dont have threads.

What kinda compression fittings have u got!!!

Dtp1979

strabow wrote: »

I was not refering to a compression fitting. As compression fittings dont have threads.

Compression fittings do have threads

Billy Bunting

strabow wrote: »

I was not refering to a compression fitting. As compression fittings dont have threads.

Perhaps a good reason to put tape around them, so we know who we are dealing with