I have a question about the overflow on a non-brass radiator. On mine, the overflow ends just below the threads on the cap fitting, which seems normal. But, capping the lower end of the overflow and blowing air into the top end shows bubbles inside the upper tank just above the tank bottom. I guess the bad news is that is not supposed to happen?
If not, can the overflow be de-soldered and replaced? Is it one continuous piece going through the upper tank bottom?
I would like to avoid replacing the radiator if possible.
Henry, I removed and re-solderded my overflow this winter. It is one tube and takes some fiddeling to get it out and back in. It has several bends inside. PK
Yes, it's one continuous tube and you should be able to replace it.
Water level in a T radiator should be one to two inches above the top of the core. Not "filled all the way to the top". If you fill your radiator to the proper level, does it leak?
Thanks for the responses. It does leak back into the overflow and onto the ground. What is the tubing material and size?
I think the tubing is either brass or zinc coated steel. Take a file to it and see what it looks like.
A piece of 5/16 copper tubing will make a replacement pretty quick.It has a lazy "Z" bend in it.
I am trying to understand how the overflow is sealed in to the upper tank. Is the overflow soldered in? - there seems to be some sort of flare to it. Apparently the overflow has a pinhole on the inside of the upper tank, causing it to leak out through the overflow.
Does anyone recognize the serial plate as to who the manufacturer might be? That would help to understand how it is fastened through the tank.
That looks like a nice radiator. I suspect your overflow tube has a split in it; it happens! It is just soldered in, and that flare is just a very nice solder job, I think. Now to give yourself some "insurance" in removing & replacing it, I would fill the radiator with water, face down like you show it now, so the water just fills the core area. This will provide a heat sink to keep the solder for the core from melting any while you are desoldering and resoldering your overflow tube.
Looking at the tube running down the side of the core, it was most likely also soldered in a few places to the side plate, not just "in the air" like it is now.
Henry, go back to Adam's reply. He states "Water level in a T radiator should be one to two inches above the top of the core."
I have 4 T's. On each of them if I "fill all the way to the top" they will all spit & gurgle until the radiator barfs the excess, then when the proper level is reached the barfing stops.
Could you possibly be over-filling the radiator?