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 > Hot Water Recirculation Loop - Save Water - Camp Longer

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Camper_Jeff_&_Kelli

Seattle

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Posted: 10/12/22 11:28am Link  |  Quote  |  Print  |  Notify Moderator

A Great Truck Camper / RV Modification
How to Install A Hot Water Recirculation Loop Or Recovery Loop
Save Fresh Water And Extend Your Camping Trip A Day Or Two With Water Saved By Not Running It Down The Drain While Waiting For Hot Water To Arrive At The Faucet
VIDEO Hot Water Recirculation Loop VIDEO

[image]
Valve and switch
[image]
Return Loop into Fresh tank
[image]
Return Loop from kitchen sink Hot, to solenoid valve then back into fresh tank.

* This post was edited 10/12/22 02:51pm by Camper_Jeff_&_Kelli *


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Lwiddis

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Posted: 10/12/22 03:05pm Link  |  Quote  |  Print  |  Notify Moderator

A very good instructional video.


Winnebago 2101DS TT & 2022 Chevy Silverado 1500 LTZ Z71, WindyNation 300 watt solar-Lossigy 200 AH Lithium battery. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist. 14 yr. Army -11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad


JRscooby

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Posted: 10/12/22 03:44pm Link  |  Quote  |  Print  |  Notify Moderator

LOL. I use a bucket to catch the water you are saving.

Camper_Jeff_&_Kelli

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Posted: 10/12/22 04:05pm Link  |  Quote  |  Print  |  Notify Moderator

JRscooby wrote:

LOL. I use a bucket to catch the water you are saving.

My way is way cooler than a bucket and I don't have to screw around with lose water splashing about. Sure it cost time and money, being retired, I have lots of both. I know the water going back into the tank is clean. Bucket water is good for toilets. The water is much more useful to me in the tank!

* This post was edited 10/12/22 04:20pm by Camper_Jeff_&_Kelli *

Dave D.

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Posted: 10/12/22 04:34pm Link  |  Quote  |  Print  |  Notify Moderator

This might be useful for winter camping. Hot water won't freeze up. Although shouldn't the recirculation return to the hot water tank, not the main tank? At least this is how I plumbed my house's recirc. heat.


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3 tons

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Posted: 10/12/22 05:33pm Link  |  Quote  |  Print  |  Notify Moderator

Bravo Jeff, that is truly a most logical and creative idea Sir, saving precious water while conserving gray tank space all in one fell swoop - Yea!! [emoticon]

What is the source and model of the solenoid valve??

3 tons

time2roll

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Posted: 10/12/22 07:52pm Link  |  Quote  |  Print  |  Notify Moderator

Dave D. wrote:

This might be useful for winter camping. Hot water won't freeze up. Although shouldn't the recirculation return to the hot water tank, not the main tank? At least this is how I plumbed my house's recirc. heat.
Yup. Did this years ago to prevent further freeze ups.

Mine is a small 1 amp DC pump that pumps water to a grundfos temperature regulated valve made for home circulating systems.

Manual switch or if cold the pump will cycle on with the furnace. Mine uses the cold side as the return so it gets some heat too.


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Camper_Jeff_&_Kelli

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Posted: 10/12/22 08:45pm Link  |  Quote  |  Print  |  Notify Moderator

Dave D. wrote:

This might be useful for winter camping. Hot water won't freeze up. Although shouldn't the recirculation return to the hot water tank, not the main tank? At least this is how I plumbed my house's recirc. heat.


The water needs to return to the low pressure side of the pump to cause a pressure drop so the pump will start. Returning to the water heater has no pressure drop because it's on the pressure side of the pump so the pump won't activate because no pressuredrophappens. You could return water to the cold Input of the water heater but to make it work, you would need a small pump and a check valve to prevent backflow. Another way to connect if you can make room is to put the return connection to the pipe between the tank and the pump. This way, there is a low pressure connection to the fresh tank and the water will recirulate directly into the intake side of the pump and get pumped right back out into the system, not into the tank

Camper_Jeff_&_Kelli

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Posted: 10/12/22 08:54pm Link  |  Quote  |  Print  |  Notify Moderator

3 tons wrote:

Bravo Jeff, that is truly a most logical and creative idea Sir, saving precious water while conserving gray tank space all in one fell swoop - Yea!! [emoticon]

What is the source and model of the solenoid valve??

3 tons


Valve is "US Solid" half inch stainless steel body solenoid $42.00
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JRscooby

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Posted: 10/13/22 05:13am Link  |  Quote  |  Print  |  Notify Moderator

Camper_Jeff_&_Kelli wrote:

JRscooby wrote:

LOL. I use a bucket to catch the water you are saving.

My way is way cooler than a bucket and I don't have to screw around with lose water splashing about. Sure it cost time and money, being retired, I have lots of both. I know the water going back into the tank is clean. Bucket water is good for toilets. The water is much more useful to me in the tank!


Well, decades back, plumbing my aunt's new house I ran 3 lines to each fixture that use hot water. Uncle figured the solar heater could heat water recirculating back to tank not need to waste water or the electricity to heat it. Aunt loves not waiting for hot water.
My house, built in '50s, I have a small tank heater under the kitchen sink. A timer turns it off/on so I have instant hot water when I'm most likely cooking/cleaning. Yes, the bucket is used in bathroom then flushes toilet when needed.
I'm not saying your idea is bad. But when you think about the small percentage of time most RV owners spend in them compared to S&B the idea would be better in homes.
BTW, for the people that want to extend time on tanks; Save your dish wash water in a bucket w/lid, use to flush saves fresh and grey water tank space. Capture and save dish rinse water. Heat fresh, add to that rinse for next wash.

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