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Plumbing education, information, advice, help and suggestions are provided by some of the most experienced plumbers who wish to "give back" to society. Since 1996 we have been the best online (strictly) PLUMBING advice site. If you have questions about plumbing, toilets, sinks, faucets, drains, sewers, water filters, venting, water heating, showers, pumps, and other strictly PLUMBING related issues then you've come to the right place. Please refrain from asking or discussing legal questions, or pricing, or where to purchase products, or any business issues, or for contractor referrals, or any other questions or issues not specifically related to plumbing. Keep all posts positive and absolutely no advertising. Our site is completely free, without ads or pop-ups and we don't tract you. We absolutely do not sell your personal information. We are made possible by:  

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 Hot water circulator
Author: yonson (SC)

I am going to install a circulator under our kitchen sink for the hot water since it takes at least 2 minute of running the water to get hot at the sink. I have a TACO circulator and I am going to place a button switch at the sink so it circulates the hot water into the cold line for a preset time then turn off. My question is... how would I NOT get hot water on my cold line at the sink? Should I use the smaller steel braided lines instead of 1/2" copper? Would this stop the cold from pulling hot into the cold side of the sink?

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 Re: Hot water circulator
Author: Paul48 (CT)

Is it a circ designed for that purpose?

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 Re: Hot water circulator
Author: steve (CA)

An electric solenoid that opens when energized along with the pump?

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 Re: Hot water circulator
Author: hj (AZ)

NO. You
need a Grundfos or Laing pump with the thermostatic control mixer.

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 Re: Hot water circulator
Author: hj (AZ)

Only a thermostatic valve will close and keep the hot water out of the cold piping.

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