Welcome to Plbg.com
Thank you to all the plumbing professionals who offer their advice and expertise

Over 605,000 posts related to plumbing

Welcome to Plbg.com (aka: PlumbingForum.com) we are the most popular plumbing information sharing, advice, DIY and educational forum on the Web. Ask any toilet, sink, faucet, pump, water quality, and plumbing related questions. Please refrain from asking where to purchase a product, business, pricing, or legal questions, for contractor referrals, or any questions not related to plumbing. Keep all posts positive and no advertising. This site is free and made possible by:  

Post New
Log In
How to Show Images
Newest Subjects
 Hot water takes too long to arrive
Author: wdavid (CA)

Please help me to solve this puzzle. I had a Rheem gas water heater with a recirculating system for quick hot water. I never ran recirculating, as just by leaving the shutoff valves in the recirculating loop open, I started getting hot water coming out of the shower heads upstairs in about 15 seconds. (Interestingly, when I closed the shutoff valves, it took longer to get the hot water to arrive.) After 10+ years, I had to replace the old Rheem with a new Rheem bought from Home Depot. The plumber did the replacement, but now running the same way as before, it took over two and a half minutes for the water to get warm. We just couldn't figure out why.
An observation: I ran the recirculating pump, the water did get hot after a minute and a half, which is too long. Also, after recirculating a while, the piping between the pump and the heater felt warm, but that on the other side of the pump remained cold – perhaps this is an indication of the problem?

Post Reply

 Re: Hot water takes too long to arrive
Author: hj (AZ)

The pipe for the circulation system may have an "air lock" and has to be purged to start working again.

Post Reply

 Thanks hj :thumb:
Author: wdavid (CA)

Thanks hj. How do you purge an air lock. I did run the recirculation for a day and a night. Is there the right way to do it? (By the way, I never received an email notification when you responded. Are we all supposed to check the site daily?)

Edited 1 times.

Post Reply

Please note:
  • Inappropriate messages or blatant advertising will be deleted. We cannot be held responsible for bad or inadequate advice.
  • Plbg.com has no control over external content that may be linked to from messages posted here. Please follow external links with caution.
  • Plbg.com is strictly for the exchange of plumbing related advice and NOT to ask about pricing/costs, nor where to find a product (try Google), nor how to operate or promote a business, nor for ethics (law) and the like questions.
  • Plbg.com is also not a place to ask radiant heating (try HeatingHelp.com), electrical or even general construction type questions. We are exclusively for plumbing questions.

Search for plumbing parts on our sponsor's site:

Special thanks to our sponsor:

Copyright© 2017 Plbg.com. All Rights Reserved.