How to Install a Hot Water Recirculation Pump | This Old House

This Old House plumbing and heating expert Richard Trethewey delivers hot water on demand. (See below for a shopping list and tools.)
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Shopping List for Install a Hot Water Recirculation Pump:
recirculation pump [https://amzn.to/2Loll4Z]
1 5/8-inch screws [https://amzn.to/2N7wysY]

Tools for Install a Hot Water Recirculation Pump:
mini-hacksaw [https://amzn.to/2NVsmfE]
adjustable wrenches [https://amzn.to/2NVmdQy]
drill/driver [https://amzn.to/2LrY6Y6] fitted with 3/4-inch-diameter spade bit [https://amzn.to/2NTGlSZ]

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How to Install a Hot Water Recirculation Pump | This Old House
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View Comments

  • Is this how it works? There is only one water source into the house that feeds both cold and hot sides and it can't flow backward to the street. So when the pump turns on it does 2 things, pulls from hot side and pushes to the cold side. The water heater would then pull in the water that comes from the pressure on the cold side. Would this be a way to prevent freezing pipes ?

  • In the UK this would be against the regs. We have specific backflow prevention meaning you cant let water go back to the through the mains water.

  • Idiot homeowner should have installed a recirculation circuit with pump, so you get instant hot - that's the way ballerz like myself did it when we built.

  • What recirculator dis u instal in this video?? I need the info asap

  • So no more drinking tap water unless you want to drink water that has been circulated through your water heater? No thanks. We love our fresh tap water here in the PNW.

  • Screw this. I'm just gonna go Tony Robins style, and go for cold showers. I heard it's good for you.

  • I just clicked to ask: is there a cold water recirculating pump??? Please stop calling them hot water heaters & hot water recirculating pumps

  • Probably not likely to get answered, but the link to the pump he installed (would work great for my purposes) just goes to amazon general search for recirculating pumps, not the specific one he installed. :(
    Anyone have a link or know what brand/model he actually installed?
    Thanks,
    RichE San Diego, CA

  • If only the Builders would centralize the hot water heater. But of course, that' s too hard for the Architects.

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