Hot Water Rad Valves

Unknown

I`m not sure what kind of rad your putting-in(I`ll assume its fin-tube), and the old-one was CI on feet, and its a HW system, then yes you can do that, provided you have the room within the enclosure.(usually there is). Just make sure the fin-tube(if it is), is properly sized to take the place of the other.

Christopher Hall

Hot Water Rad Valve help!!

I'm trying to replace a radiator that was put in in 1978 with a modern version. On the old rad, 2 pipes come out of the floor into 1 valve that is connected to both the top and bottom of the rad on the same side. The new rad however has one connection on each end at the bottom. Is it just a matter of lengthening the return pipe to reach the other end of the new rad or is it more complicated than that?

Ken_40

You got it!

Trying to write down what you have, is tough with words without pictures.

You wrote: "On the old rad, 2 pipes come out of the floor into 1 valve that is connected to both the top and bottom of the rad on the same side."

If you meant to write: "On the old rad, 2 pipes come out of the floor, almost next to each other. One goes into the on/off valve that is then connected the top (or bottom), and the other pipe passes past that - and enters the rad on the same side..." That means you have a radiator that can be attached in any of four places, and yours was installed using just one side.

The new rad you're installing, has only two tappings. One on the left bottom, the other on the right bottom.

If I have properly stated what you see and have, the answer is: Yes; you can simply re-route the one pipe and put it in the other tapping. Just don't decrease the pipe diameter! And of course, don't forget the obligatory bleeder. Should be 1/8" NPT.

Christopher Hall

Ken...

It sounds similar to what you have described.At the left side of the rad 2 pipes come out of the floor exactly next to each other and are connected to the bottom of the valve, which is connected to the bottom of the rad. There is a pipe that exits from the top of the valve and connects to the top of the rad (also on the left side). You can find pics of the new rad at www.quinn_radiators.co.uk/product_roundtop.php
Images 1 and 2 are the one I want to install.
The installer who was here this morning said that because all our rads are on the same loop that the hot water has to enter and leave the current rad by the valve and could not enter one end of the new rad and leave at the other end to continue on to the rest of the rads in the loop. This didn't make any sense to me--surely as long as water enters via the existing feed pipe and leaves the rad through the existing return pipe then all should function properly? Am I missing something?

Ron Schroeder

Sounds like you have Panel radiators

and that the new style has a TRV Valve at one end and that the old one had a deverter valve, if this is so you might need an bypass with the new TRV valve can you take pictures of the old Radiator. I corrrected the URL

www.quinn-radiators.co.uk/product_roundtop.php

Ken_40

I think Bruce is correct!

I assumed you had a c.i. wall hung style.

What you have is called a panel-rad.

The nature of the two-pipe into one valve arrangement is unique and somewhat proprietary. The panel rad manufacturer usually designs the supply and return locations to line up with a valve manufacturer in mind. Typically Danfoss, Honeywell, Braukmann or a more likley euro-branded device, us yanks would have minimal knowledge of...

I would defer to others more knowledgeble in this arena. Panel rads are definitely not near the top of my must-have products. In fact, they are anethema to my notion of style and functionality. Nonetheless, clients who wanted them, seemed marginally pleased with them.

Christopher Hall

Thanks everyone, I'll see if I can get some pics of the current setup.