Discuss One pipe system special rad valves in the USA area at PlumbersForums.net
Thanks there also interested in a vertical collum radiator around 400mm wide 1000 to 1500mm heigh. Any chance of this working?Should work if it's s standard towel rad. Avoid any which require the flow on a specific connection. As for valves standard valves will work but avoid things like Drayton trv as the have those small holes which may be yo restrictive. I'd use standard straight lockshields out of the floor. Sweep tees can be brought for around 5-6 quid.
You could use one of the Caleffi one-pipe valves, where you don't have a 'straight-through' pipe (other than what goes on inside the valve), so nothing needed under the floor, not even a pipe! The thermostatic version effectively acts as a diverter. There are other styles, and other brands.Thanks why do the tall ones tend to struggle on a one pipe system? Putting a valve on the straight through pipe many not be great as there will be no access to the pipes underneath the floor afterwards. Laminate going down.
Why is it that tall rads. Struggle on a one pipe system? Is it because the water isnt pumped through the rad. It relies on convection?You could use one of the Caleffi one-pipe valves, where you don't have a 'straight-through' pipe (other than what goes on inside the valve), so nothing needed under the floor, not even a pipe! The thermostatic version effectively acts as a diverter. There are other styles, and other brands.
This is the sort of thing I was thinking of:
but not sure how well this might work with a tall rad!
It is indeed claimed that circulation is due to convection, but I would have thought if that's the case, a taller radiator might work at least as well as a short one. I don't know enough about fluid dynamics to answer.Why is it that tall rads. Struggle on a one pipe system? Is it because the water isnt pumped through the rad. It relies on convection?
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