One pipe system

[Dannyparty92]

I know this may seem a little cheeky to ask but would someone please explaine to me how it is possible to be able to combine a one pipe system with a two pipe system? I'm assuming fitting a new pipe and just teeing in before the connection to the boiler?

 

[on31ll]

Easier to rip it all out and full install ! But think about it ! Run another pipe alongside the pipe their already then tea off and go into one side of all the radiators in a circuit ! But like i said easier to rip it all out ! I wouldnt want to be cutting back old piepwork then soldering stop ends on all the excess branchs if that makes sense !

 

[SimonG]

Easier to rip it all out and full install ! But think about it ! Run another pipe alongside the pipe their already then tea off and go into one side of all the radiators in a circuit ! But like i said easier to rip it all out ! I wouldnt want to be cutting back old piepwork then soldering stop ends on all the excess branchs if that makes sense !

Been there and done that. Converted a 1 piper into two. Used the existing pipework as the flow and installed new return. Ground floor was nice and easy as there was a two foot void and the house had been built on a raft.

 

[Dannyparty92]

Then just use the additional tapping in the boiler to connect the return into?

 

[on31ll]

What do you mean extra tapping pal. One pipe system is one big loop with radiators connected to that loop where a two pipe syten uses the radiators to join the two pipes thus connecting the system ! In its simpleest form.

Read here some info
http://www.ukplumbersforums.co.uk/central-heating-forum/50800-one-pipe-system.html

 

[Dannyparty92]

Ok so one pipe come out of the boiler then that pipe loops around the rads then tee off when it exits the boiler for the return loop so you have a two pipe system with just one pipe going into the boiler?

 

[plumber0808]

It starts as a flow from the boiler runs through the rad flow out the ret on to the next rad and continues back to the boiler as a return.
draw it out, you are over thinking it.

 

[Dannyparty92]

For some reason I though one pipe systems only had one tapping in the boiler. Silly me hey.

 

[on31ll]

No the boiler is the same just piped differently ! Think about it if it was just one pipe and a closed end the water cpuldnt pump around it ! It just wouldnt work !

Heres a pic...

Single Pipe Central Heating Systems

 

[Dannyparty92]

I know now for some reason I just pictured it like that haha.