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Old 03-11-2015, 12:51 PM   #1
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Instant hot water without tank less wh.

I've found a solution for instant hot water without a on demand wh.

Install pump "very quiet" at wh then install "recirculation valve" at furthest tap from wh.
The valve opens up when water cools and returns it back on the cold side allowing hot water at all times.

Also has a timer for "on demand" times.


These can be found cheaper.

Watts, Hot Water Re-Circulating Pump with Timer, 500800 at The Home Depot - Mobile


Thoughts?
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Old 03-11-2015, 01:28 PM   #2
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Had a similar system put in our house in Asheboro, NC. They are fantastic. Ours ran 24/7 and no timer. When the previous owners replaced the wh, they set it at the far end of the house under the master bath. The kitchen was on the opposite end of the house and took forever to get hot water. The recirc. pump solved the problem. Only cold water coming from the hot line was the amount from the faucet down to the supply line. Maybe a 1 or 2 cups.

You have to have a return line from the furthest faucet back to the pump.
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Old 03-11-2015, 01:35 PM   #3
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Had a similar system put in our house in Asheboro, NC. They are fantastic. Ours ran 24/7 and no timer. When the previous owners replaced the wh, they set it at the far end of the house under the master bath. The kitchen was on the opposite end of the house and took forever to get hot water. The recirc. pump solved the problem. Only cold water coming from the hot line was the amount from the faucet down to the supply line. Maybe a 1 or 2 cups.

You have to have a return line from the furthest faucet back to the pump.
This one just returns it to the cold line.
No return needed.
That's what that black valve is for.
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Old 03-11-2015, 01:44 PM   #4
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The way it shows in this video http://webapps.easy2.com/cm_mvc/Gene...ge_id=35844403 the warm water from the HOT water line gets pushed through the valve and into the COLD line back to the WH. Would this not cause the COLD water to be warm?
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Old 03-11-2015, 01:49 PM   #5
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Quote:
Originally Posted by TURBS View Post
I've found a solution for instant hot water without a on demand wh.

Install pump "very quiet" at wh then install "recirculation valve" at furthest tap from wh.
The valve opens up when water cools and returns it back on the cold side allowing hot water at all times.

Also has a timer for "on demand" times.


These can be found cheaper.

Watts, Hot Water Re-Circulating Pump with Timer, 500800 at The Home Depot - Mobile


Thoughts?

Question, does this mean that a person with this installed can have a long hot shower even with a 6 gal water heater? Or it this just for instant hot water?
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Old 03-11-2015, 01:57 PM   #6
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I would say just instant hot water. The amount of hot water does not change.
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Old 03-11-2015, 01:58 PM   #7
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The way it shows in this video http://webapps.easy2.com/cm_mvc/Gene...ge_id=35844403 the warm water from the HOT water line gets pushed through the valve and into the COLD line back to the WH. Would this not cause the COLD water to be warm?
Cold water will be warm for about 2 cup fulls of water then cold again.
So my boss says.
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Old 03-11-2015, 01:58 PM   #8
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Question, does this mean that a person with this installed can have a long hot shower even with a 6 gal water heater? Or it this just for instant hot water?
Just instant hot water not more.
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Old 03-11-2015, 01:59 PM   #9
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Just instant hot water not more.
Thought so, but I had to ask
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Old 03-11-2015, 02:27 PM   #10
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Question, does this mean that a person with this installed can have a long hot shower even with a 6 gal water heater? Or it this just for instant hot water?
Just instant hot water. The amount is strictly based on the recovery rate of your heater. If you have a low flow discharge, you might be able to take a long hot shower.
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