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Question DetailsAsked on 1/9/2015

names of hot water recirculating systems

I want to install a recirculating hot water system

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1 Answer


Here is a similar recent question with answer that might help -

You really do not buy a "system" - just convert the current dead-end plumbing to loop supply, and install a circulating pump with shutoff switch, or timer switch if you only want the constant-hot water during certain hours.

Watch code requirements - some areas prohibit them on the outflow line and only allow them on the return line to the water heater, so they do not pull the water out of it if you have a leak or line break AND the incoming water supply fails at the same time AND the hot wataer pipe pulls from inside the tank rather than just from the top like almot all do - unlikely, but some code writers are quite conservative - rightly so probably, when it comes to the possibility of launching a water heater through your house because it went dry.

Many companies make suitable pumps - Grundfos and Taco (my favorite for LONG life) are a couple that I like which have booklets or pages on their websites explaining how it works. Watts, Honeywell, Johnson Controls and BellGossett are a couple of other names I trust - don't know offhand if they have sections on their websites about it. If you are going to put in a sometimes on, sometimes off system the right type of pump has to be installed - some types allow flow-through when they are not running, others largely to almost totally block the flow if they are not running when someone runs the hot water.

Answered 4 years ago by LCD

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