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Watts Radiant Onix tubing giving us major problems and a massive headache

Denzy Member Posts: 1
My wife and I just spent the majority of our savings on the purchase of a lovely new home... with one slight caveat: the heating system.

We have an oil boiler with forced hot water baseboard heating. On day one of moving in we noticed there was no heat in the upstairs and we immediately called a company that services these boilers. They said the problem was the piping. The first floor water was coming back hot, but the second floor was ice cold. They took off the pump to the second floor and showed me the inside... it was clogged with black gunk, so they flushed the line and installed a new one. No matter what they did they couldn't get the water to flow as fast as it should be, and told me it was because of the 1/2 inch black radiant Onix tubing used. They applied so much pressure when they tried to flush the lines that the boiler sprayed water all over the floor, and the water that was coming out of the lines from flushing was a black sludge. They said it was a defect in the piping and it is allowing oxygen into the system, and nothing can be done except replace all the pipes.

After the flushing we now have reclaimed some slight heating to the upstairs, but rooms like the master bed,
and bathrooms are still iceboxes... the baseboards don't even get warm. I was told that the flushing was a temporary fix and that the issue will most likely return. The estimate they gave me was upwards of 20k to fix, but honestly if we were going to dump that much money into this system we'd do something completely different anyways... neither of which we currently have the money for.

Is there anything we can do to fix this? I have done some research into people who have had similar issues and said that they needed to use a "power flush" machine to clean the lines and that has given them success in restoring water flow, but I don't know who exactly to contact about this as the "professionals" that previously came to us said the only solution was to replace the pipes.

Any suggestions? My wife is freaking out that our new house is a money pit, and I'm worried she might be right.


  • kcopp
    kcopp Member Posts: 3,990
    Yes a power flush cart would help get out the sludge.
    After flow is returned the you can add in Inhibitors to the system to help stave off the corrosion.
    Where is this home?
    We may be able to direct you to help.