How to loop 2 cast iron rads

jonny88

HI all.Customer lives in an old georgian house .House is 3 stories and is on one zone,a large gravity system.On the top floor there is a bathroom with a cast iron rad.In the bedroom 6 ft away is another cast iron rad.The bedroom radiator has a seperate feed and return coming from basement.At some stage the riser to this rad was disconnected.The bathroom rad works fine.Im assuming there was a leak or some issue with the bedroom rad.Heres my ?.Can i make a loop with the bathroom rad and bedroom rad.I was looking at systems etc on the site and can't find a drawing that shows the correct way as I am figuring air will be a problem.Thanks in advance for any input.

icesailor

Loopy rads:

If you "Series Loop" two radiators together, the first radiator has to fill with hot water before the second radiator fills. Experience shows that the second radiator never works properly.

Ironman

Still Gravity?

I agree with Ice that it probably won't work well, particularly if it's still gravity. If it's been converted to forced flow, you make it workable by adding a small circ on that riser, but the first rad will still heat up first.

jonny88

thanks guys for your info

i am actually going to install a manifold and run a homerun to each rad. Thanks for the advice.