Radiator Inlets/Outlets

[blondeone]

I've recently been to view a property and whilst looking at the radiators we noticed that the inlet/outlet were not only on the same side of the radiator but both at the bottom.

I don't believe the plumbing has been looked at for a long time, has anyone come across this before and what are the potential problems with a system of this type?

 

[kevplumb]

twin entry valves

they work ok

 

[corgigazza]

single pipe layout rather than conventional twin pipe

 

[kevplumb]

single pipe layout rather than conventional twin pipe

with twin entry valves

 

[corgigazza]

Yes danfoss supply them, found out when a radiator was converted to normal tvr + lsv and customer complained rads kept getting cold removed trv head and all rads then got hot ps theses valves also have an extra piece of 10mm tube internal fitted inside the rad 12 inches long to encorage convection

 

[kevplumb]

HONEST a peice of 10 mm well i never

still cant see them working on a one pipe system

 

[corgigazza]

They have an internal bypass to set up the amount of flow to rad and work reasonable well, also only work on rads were you can slide the pipe into, some double panel rads you cant do this

 

[kevplumb]

i know what they are and what they look like

point is you will not get the flow on a ONE PIPE SYSTEM

 

[corgigazza]

don't understand why you think you wouldnt get flow on a single pipe system if the trv shuts down stopping the flow to the rad the internal bypass opens sending the flow to the other rad can be good fun balancing each rad to allow even heat on the first to the last rad, only seen these valves fitted in flats though. the rad itself works by convection the long pipe is the flow, heat rises and returns to bottom, They do work the first time I see one I thought this will never work.

 

[kevplumb]

cos a one pipe system uses convection to curculate the water through the rad
and you aint gonna get much through 10 mm