Hot water radiator will not heat in basement!

Steve Minnich_1

Like Dan says, you have to try and think like the water. It doesn't want to go down there, it needs a little persuading.

Good luck, Steve Minnich

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Gregory J. Freeman

Radiator will not heat in basement

We installed a used cast iron radiator in the basement on a two pipe parallel system. The problem is the radiator will not heat with all the air out of it. The radiator has been taken out three times and inspected for obstructions, and the piping to the radiator has been power flushed. The radiator is piped with 3/4" I.D. copper pipe, the supply comes in on the right-side of the radiator low, and the return is on the left-side low, and the air vent is on the left-side high. The piping for the radiator is spaced three inches center to center one on the main supply which is one inch I.D. and one on the main return which is one inch I.D.
Question? Does the rule still apply that if a radiator is below the main piping keep you feeder lines to the radiator equal or greater distance apart at the hook-up point on the main piping to lower the resistance to flow rate to get heat?

Alan(CaliforniaRadiant)Forbes

That rule

is only for a 1-pipe system with venturi tees; on a 2-pipe system, it doesn't matter since you don't have to create a pressure drop to force the water into the radiator.

Some suggestions re: radiator not heating:

- You might have an air problem, but it might not be in the radiator; it could be in the piping. Have you power purged the supply lines?

- Have you tried to turn off all the other radiators, thus forcing flow through only this one radiator?

- Is the piping for this radiator in the ceiling above it or in the floor below it?



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John@Reliable_4

Is it ?

Direct return or reverse return? Hint> reverse returns have less balancing problems. If piping is overhead and radiator is below you need monoflow fittings

Mark Hunt

Install Diverter tees (2)


on the supply piping and pipe to the radiator that way.

That should do the trick.

Mark H

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