Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I believe my hot water baseboard heater was hooked up wrong. The feed and return are opposite. The plumber said it's not a problem as we'll still get heat. Is that so, because we don't get a lot of heat from the heater. Please advise.

share|improve this question
What makes you think the baseboard has feed and return? Every baseboard(as well as radiator) I've ever seen in a forced hot water system couldn't care less how it's connected. If it was just installed and doesn't heat up, the it is probably air bound and needs to be bled. Have the plumber come back and double check for that – Vitaliy Oct 14 '13 at 15:32
Are you saying the bleeder vent should be on the feed side? We are having similar issues and the heating tech agrees, it shouldn't matter which way the water flows. But each radiator's bleeder vent is not on the same side-feed or return. I don;t know if there is a one way "T" installed to direct the hot water up the feed then another to return to the loop. I need to bleed air out of the same but not all radiators weekly. Confused… Ted – user18191 Nov 20 '13 at 3:33
There will often be one spot that collects most of the air, whether by design or by accident will vary with the design or lack thereof. On the other hand, if you have to bleed every week, something is wrong - The fluid in the system should stay in the system, and once the air is removed, no new air should get in, with a properly functioning system. Constant air bleeding implies air leaking in or water leaking out (and being replaced by new water with new dissolved air.) – Ecnerwal Nov 20 '13 at 4:12

Assuming it's a hot-water baseboard heater, there should be no problem from which way the water goes. It's a rather simple machine (pipe with heat dissipators) so it couldn't care less which direction the hot water is flowing.

What could be an issue is if a bleeder valve was installed on the output side and not the intake side. Typically the intake side would collect more air to bleed.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.