{"product":{"product_id":"B000E78XHG","title":"Watts Premier Instant Hot Water Recirculating Pump System with Built-In Timer 6\" X 6\"","price":"177.98","image_url":"https://m.media-amazon.com/images/I/41xy2kAAKKL._SL500_.jpg","url":"https://www.amazon.com/dp/B000E78XHG"},"comments":[{"body":"You need one of [these](https://www.amazon.com/Watts-500800-Recirculating-System-Built/dp/B000E78XHG/ref=sr_1_1_sspa?ie=UTF8\u0026amp;qid=1521383352\u0026amp;sr=8-1-spons\u0026amp;keywords=recirculating+pump\u0026amp;psc=1). It will keep the water hot at a distant tap. It also cuts down on wasted energy heating water that eventually just get cold anyway. Insulating the hot water supply line to the bathroom will help too.\r\n","subreddit_name":"HomeImprovement","author":"BigRodInPhilly"},{"body":"Yep, and in the showers. I'm not sure what happened with the plumbing in this house, but we used to have to turn the shower on full hot, wait 4-5 minutes, then get the temperature right and get in. It took forever and was a huge waste of water. A [hot water re-circulation pump](https://smile.amazon.com/Watts-500800-Instant-Recirculating-Install/dp/B000E78XHG) and hooked up some automation. No more waiting for hot water anywhere.","subreddit_name":"homeassistant","author":"sethdaniel2011"},{"body":"If you have access to the pipes behind the bath you could add the bypass valve and a recirculating pump. That's what I did to my bathroom and it's awesome. I put the pump on a smart outlet and tell google to turn on the hot water a few minutes before taking a bath or shower and it's been a hand changer. We no longer run the water for 2-3 minutes just to get hot water. It was super easy to install. I put the bypass valve under the bathroom sink because it was a lot less work then to add it to the bathtub pipes. The sink is only a few feet from the tub. If you have individual pipes running to the sink and run it won't work for you, but my sink and tub are connected to the same hot water pipe from the basement. \r\n\r\nThis is what I installed. \r\n\r\nhttps://www.amazon.com/dp/B000E78XHG/ref=cm_sw_r_cp_apa_glt_fabc_7MC2KNS6DA383YQMTYZK?_encoding=UTF8\u0026amp;psc=1","subreddit_name":"Plumbing","author":"McGyver62388"},{"body":"Your sink and shower have water-saving flow limits (usually under 3gpm). It can take a long time for them to pass enough water to clear the the pipes of the room temperature water (that cooled standing in the pipes between uses) so you start getting hot water from the heater. \r\n\r\nThere are a three solutions.\r\n\r\nThe easiest thing is to turn on the tub hot and let it run until hot. That will bring the hot water from the tank, and your sink and shower will be warm within a few seconds. \r\n\r\nYou can install a shunt that lets cold water in the hot water pipe go into the cold line, and put a pump at the hotwater heater. The drawback is these make your cold water side run tepid (from the warm water you've dumped into the cold pipe) for a few minutes. When the tepid water flushes out your pipes and the cold arrives, your shower is going to go COLD until you readjust the temperature. (My wife hated ours so much I had to take it out.)  ([LINK](https://www.amazon.com/Watts-500800-Instant-Recirculating-Install/dp/B000E78XHG/ref=sr_1_5?crid=2ESYRYZZLRQ08\u0026amp;dchild=1\u0026amp;keywords=hot+water+recirculating+pump\u0026amp;qid=1609129945\u0026amp;sprefix=hot+water+%2Caps%2C297\u0026amp;sr=8-5))\r\n\r\nYou can install a separate return hot line and install a recirculating pump. This is what hotels with large industrial water heaters have. You continually circulate hot water through the main pipe so when someone turns on a faucet anywhere along the line they get hot water fast. These consume more energy, because the water in the pipes is continually cooling, so you have to reheat it. Also, running the pipe can be a major expense and hassle because the pipes are are in the walls.","subreddit_name":"homeimprovementideas","author":"Art_in_MT"},{"body":"Here is what I installed:\r\nhttps://www.amazon.com/Watts-500800-Instant-Recirculating-Install/dp/B000E78XHG/ref=sr_1_2?keywords=water+recirculating+pump\u0026amp;qid=1669768961\u0026amp;sprefix=water+rec%2Caps%2C181\u0026amp;sr=8-2\r\n\r\nI have mine set to run every half hour or so. You could probably do less. For me this is also the master bath that I use, so it is nice to have instant hot water.\r\n\r\nIt installs on the hot side and the main purpose of it is to help with hot water getting to the far end of the pipe system. But as it does cycle some warm water through the cold pipe system, it works for preventing frozen pipes too. The way it works is there is a valve that you re-route your lines to. Then it cycles hot water up the hot water pipes and the valve closes once water gets to a certain temp. So in operation it cycles water through the lines and also the valve closes once water gets to a 'hot' temp so to speak. So warm water ends up cycling back through cold water supply.","subreddit_name":"homeowners","author":"arctic_man"},{"body":"My first thought would be a point of use water heater, the little five gallon guys but I don't know of an efficient way to power it DC.\r\n \r\nThere is almost certainly one made for motor homes and RVs running 12v or 24v. You might want to call a local RV dealer and ask them if they know of such a thing. The cost of building what you want may very well exceed simply buying one already suited to your needs.  \r\n\r\n[These](https://www.amazon.com/Watts-500800-Instant-Recirculating-Install/dp/B000E78XHG) recirculators are very quiet and don't run very fast making them efficient. They can be found for much less money, this is a higher end model.","subreddit_name":"DIY","author":"sonicjesus"},{"body":"I have one of these:\r\nhttps://www.amazon.com/Watts-500800-Instant-Recirculating-Install/dp/B000E78XHG\r\n\r\nBasically uses the cold water line as a temporary hot water recirculation line. If you wanted to improve on it you could make it smart instead of just a dumb time clock on the pump.\r\n\r\nBefore I installed this thing, I would run the cooled-off hot water into the tank on my toilet using the handheld shower nozzle.","subreddit_name":"engineering","author":"TheBassEngineer"},{"body":"You don't need to be \"ultra rich\" to have instant, very warm water.  I have the product linked below and if you install the accompanying valve at the faucet farthest from the hot water heater, every sink between the water heater and the valve will enjoy the benefit of the recirculation system.  In California where drought is a real problem, this device is saving me perhaps 15-30 seconds of wait-time per person (4 in my household) per day.  The water isn't instantly hot, but it is instantly warm enough to immediately start showering.\r\n\r\n[recirculation pump](https://www.amazon.com/Watts-500800-Instant-Recirculating-Install/dp/B000E78XHG/ref=sr_1_6?keywords=hot+water+return+pump\u0026amp;qid=1667228362\u0026amp;qu=eyJxc2MiOiIzLjc4IiwicXNhIjoiMy4wOCIsInFzcCI6IjIuNzMifQ%3D%3D\u0026amp;sprefix=hot+water+return%2Caps%2C176\u0026amp;sr=8-6\u0026amp;ufe=app_do%3Aamzn1.fos.f5122f16-c3e8-4386-bf32-63e904010ad0)","subreddit_name":"NoStupidQuestions","author":"Gandol_teh_Pirate"},{"body":"I was in your shoes earlier this year.  I had a natural gas water heater in the garage and an electric heater at the opposite end of the house.  I decided to go hybrid electric in the garage and completely remove the other one.  I had to go under the house and run the hot water supply to the end of the house where the other water heater was located and also install a hot water recirculating pump https://www.amazon.com/Watts-500800-Instant-Recirculating-Install/dp/B000E78XHG/ref=sr_1_5?crid=1XHMWS0673C33\u0026amp;keywords=Watts+hot+water+recirculating\u0026amp;qid=1663447718\u0026amp;s=hi\u0026amp;sprefix=watts+hot+water+recirculating+%2Ctools%2C165\u0026amp;sr=1-5\u0026amp;ufe=app_do%3Aamzn1.fos.18630bbb-fcbb-42f8-9767-857e17e03685 but I am super happy with this setup and we have significant energy savings monthly.","subreddit_name":"hvacadvice","author":"finqer"},{"body":"Watts Premier Instant Hot Water Recirculating Pump System with Built-In Timer 6\" X 6\"\r\n\r\nThis is going to be cheaper than replacing the entire heater, but also keep in mind you'll be losing heat by keeping hot water in the pipes.\r\n\r\nhttps://www.amazon.com/Watts-500800-Instant-Recirculating-Install/dp/B000E78XHG/","subreddit_name":"HomeImprovement","author":"Steeps5"},{"body":"It looks like a connection for a hot water circulation pump. Something like this: https://www.amazon.com/Watts-500800-Instant-Recirculating-Install/dp/B000E78XHG\r\n\r\nWhen the pump runs it send hot water down the cold line to get the  hot to the tap faster. It's a work around that requires less pluming. Usually the under sink connection is made on the fixture that is located farthest from the water heater.","subreddit_name":"homeowners","author":"InformalBasil"},{"body":"I don't know any that detects temperature in the way that you had in mind. But this should do what you want: https://www.amazon.com/Watts-500800-Instant-Recirculating-Install/dp/B000E78XHG\r\n\r\nKeep in mind, recirculators are a huge waste of energy if you're trying to maintain constant hot water at all times. Once water leaves the tank, it immediately cools. Half the length of your furthest faucet will need to be replaced with hot water. Assume you have a 50 gallon tank and it's 1 gallon of water that is replaced. That's 2% of the hot water tank that's \"lost\" because you wanted instant hot water. This in turn means your hot water tank will run more often than needed, thus decreasing the life of the tank.\r\n\r\nThe button option helps save water and can give you \"instant hot water\" if you plan ahead. Press the button before you start using the toilet. Press the button before you start getting undressed for a shower. If you need to wash your hands right away, then you'll have to suffer through some cold water.","subreddit_name":"hvacadvice","author":"pandaman1784"},{"body":"**LPT:** Install a [recirculating pump](https://www.amazon.com/Watts-500800-Instant-Recirculating-Install/dp/B000E78XHG) at your water heater and then the sensor valve at the farthest sink from your water heater.  Water will get up to temp much faster afterwards.","subreddit_name":"funny","author":"Mike01Hawk"},{"body":"As an alternative to those, I use one of these:\r\nhttps://www.amazon.com/dp/B000E78XHG/ref=cm_sw_r_cp_apa_fabc_HP3N2XZPC4H3V3924WVB?_encoding=UTF8\u0026amp;psc=1\r\n\r\nIt circulates the hot water through the system and is very effective at keeping the pipes from freezing. I added a temperature controlled relay that only turns on when the temp outside is low enough to warrant it. This was a great option for lines buried in walls I did not want to open up.","subreddit_name":"HomeImprovement","author":"omeara4pheonix"},{"body":"Most likely frozen pipes.  \r\n\r\nI have 170year old home.   If you can rerun them,  that would be best.  If you can't look into getting a [recirculating pump.](https://www.amazon.com/dp/B000E78XHG/ref=cm_sw_r_cp_apa_fabc_EYKHH7TH8ADGAJF9EZZ7?_encoding=UTF8\u0026amp;psc=1)\r\n\r\nIt's what I use.  Put the \"sensor\" at the farthest point in your water system.  It will keep hot water at the taps,  and drop warm water back down the cold.   \r\n\r\nIt's saved me from frozen pipes.","subreddit_name":"HomeImprovement","author":"Chefitutide"}]}