Watts Hot Water Recirculation System with Programmable Timer for Tank Water Heaters, Instant Hot Water, 120V Pump, 10 ft Cord, 2 Adapters, Sensor Valve, Mounting Screws, 2 Supply Lines (0955800)

This was well worth the money. I live in an older ranch style house and the hot water for the shower has to go the full length of the home before getting to the shower. I’d have to run it for a minute or two before it got warm than hot wasting a lot of water. This pump gives me nearly instant hot water with just a few seconds delay. Install: all needed parts were included and it was very simple to install in the water heater and under the sink. When installing on your water heater just make sure to follow the simple directions. You do not need to drain your entire water heater. Just close the inlet valve and drain off a few gallons to remove any pressure from the outlet side. Screw on the pump, plug is it and fire up the after heater again. Using the pump: the built in timer allows for off, timer, constant on. In the off position it’s as if it isn’t installed. You just have to wait for hot water. Constant on means the pump is always on and gives you instant hot water at all times. Timer allows you to select periods of time that it runs and break it down to 15 minute increments over 24 hours. It will continue to run while the timer is in that particular time block. It will be using power to keep the pump spinning but it won’t feed hot water. The valve you install under your sink allows water to flow until the temperature of that water hits a set pint in which the valve automatically closes and water stops flow. The pump will continue to run though. This does not wear it out or cause issues with your plumbing, don’t worry. It’s also nearly silent. Overall it’s a great investment to save water and energy.

After years of waiting for water to reach the far areas of my house, I had finally had enough. This pump exceeded my expectations and works flawlessly. It sat on my counter for a few weeks until I finally decided to install it. Installation time was less than 30 min. It took me longer to get the junk out from beneath the far sink than it did to install. The instructions are straight forward and easy to understand. I did the under the sink valve first. They supply you with all the right hoses and connections. I did have to get long hoses, but that is not the fault of the mfg. My supply pipes are further apart. I bought longer hoses and everything was golden. Installing the pump was beyond easy. Yes I did have to buy the correct CPVC fittings with 3/4" threads to connect to the pump. Less than a dollar at the local hardware. Off the discharge pump I went with a flexible hose that connected to my system. You will have to buy a few extra pvc fittings if you need to make it work with your water heater system. It took less than 30 min to install in total and I plugged it in. I could tell it was working, but the pump is extremely quiet. We set the mode to timer, because we want it on from early morning to around 11 pm at night then the timer shuts off the pump. You will still have hot water, but just not as fast as when the pump is working. Even if you let it run all the time, it would cost around $20 a year, tops, but the timer is a nice feature. So far I am extremely happy with the product and it has hot water at our furthest sink within 5 seconds. Don't hesitate to buy this product.

I happened upon the idea of hot water recirculating pumps while looking for a small on demand hot water heater for under my kitchen sink. My home is over 4,000 square feet and has 5 different levels plus a basement. Hot water is supplied via a single gas heater in my basement. The kitchen sink is actually the closest tap to the heater but with mine and my wife's schedule, we are actively using hot water at two different times of the day. My wife and I are both up at 5 am, I get ready for work while my wife works out. In prefer a shower at night so in the morning I'm only preparing my breakfast and packing a lunch. After preparing breakfast and lunch I'd rinse the dishes, the hot water would reach the tap just as I was finishing. I'm out the he door by 6 am at which time my wife is be jumping in the shower. She'd have to let the shower in the master bedroom run for a min or so to get hot. The master bath is above the kitchen. At night I hit the gym on the way home. I'm home around 6 at which point I'd clean up my dishes and make dinner or if my wife cooked I'd eat. My wife gets home from work around 5 pm. I'm in the shower between 8-9 pm and as the saying goes, rinse and repeat..... I've found that I'm constantly waiting for hot water. When my wife and I return home from work, we clean or rinse dishes etc and the water takes time to warm up. As we all know, once the pipes get hot, the subsequent use of hot water within 15-30 mins results in instant hot water. When I move upstairs to my master bath, the cycle repeats, the pipes leading to the shower have to heat up since the bathroom wasn't used since 6 am that morning. Solution, I purchased this unit and installed the valve on the guest bathroom which is on the same level as my master bath and happens to be the farthest from the hot water heater. I set the timer on the pump to run from 4am-10am and 4pm-10pm. I found that hot water wasn't instant at the kitchen or master bathroom but it only took 5 seconds or so for hot water. The guest bathroom has instant hot water at these times and the cold water from the sink comes out like warm for 20-30 seconds. Conclusion: the pump is honestly a no brainer. The only drawback is the sink with the valve won't have instant cold water, instead it will be luke warm for some time. The power consumption is minimal, any worry about cost of operation should first consider the cost of operating a TV or computer va this until which saves literally thousands of gallons of water. As far as energy consumed heating additional water, I would consider this; based on my hot usage, my pump turn on about 1 hr before my wife and I wake up and start using hot water. The hot water heater will trigger startup about 30-60 minutes after the pump Has started due to the drop in temperature caused by the pump slowly circulating hot water. Once we start using hot water, this of course adds to the demand on the hot water heater what I found is that the hot water heater doesn't start more often, it just runs for a longer period of time. This is a win win because the units waste most of the energy consumed (gas, oil or electric) during startup as the components get up to temperature. Think of it like this, how much has downs your car consume while driving down the highway? Cars are most efficient when traveling down the road in its highest hear at between 60-75 mph. Any faster and the wind resistance takes significantly more effort to overcome. Any slower and the vehicles motor is turning to slow to create enough power to maintain speed or a lower gear is needed which is less efficient. Your hot water heater about 10-20 minutes after startup is like your car cruising down the road as I explained. Now think about when your car is stopped and turned off. To get going your first have to turn the car on then start driving. While excelerating, your car is very inefficient but once up to speed, all is well and it's becomes efficient again. Setting up the timer to turn the pump when you normally use water will usually only extend the runtime of your hot water heater. This results in very little wasted energy but the water savings and impact on our environment from the saved water vs increased fuel consumption is dramatic. If you have a well and septic system as I do, this relieves close to 15% of water consumed from your well which in turn puts less stress on your septic as there is significantly less waste water. Lastly this pump includes one of the thermostatically controlled valves so don't bother purchasing a seperate one unless you have a home with a branched hot water line off the main line. In that case a second valve can be put on that line so you heve instant hot water from all taps.

I have looked at several alternatives to save both water and water heating costs and everything I came up with was either too expensive or just not feasible at this location so I purchased this system. It works really well and the timer allows me to only have it on a few hours a day. Right now it runs four hours in the morning and four in the evening but I'm finding I don't need it even that much so I will cut down the runtime a little each month until I find the optimum runtime. I was afraid I would be running the cold water tap to get cold water as much as I had been running the hot to get the heated water up from the water heater to the tap. Happily, only a little water is wasted on the cold side whereas gallons were wasted before the installation. Better yet, I have realized I don't need totally cold water from that side as much as I thought I might. I would still recommend moving your water heater closer to the point-of-use, if feasible and affordable and, better yet, installing a tankless water heater. Next best option would be to install a recirculation system with a direct return from the farthest point directly to the water heater. Barring the feasibility of using one or two of those possibilities, go with this system. It is not expensive and at least will save a lot of water. Finally, I also had to install two more relief valves because I have a branched system in my house so I did that to gain the greatest possible savings. Unfortunately, a system like this doesn't save any of the water heating costs.

Wow! I wish I had done this sooner. It used to take nearly 2 minutes for hot water to reach my shower, wasting energy, water, and time. It now takes less than 20 seconds! First the build quality is excellent. The body of the pump is cast iron. One connection is 3/4 in. male thread and the other is a 3/4 in. female coupling. An extra long 10 ft cord makes wiring as easy as plugging in a lamp. The under-sink bypass unit is a thick plastic/nylon. The included connecting hoses are stainless steel braided hoses. Now for installation. The under-sink bypass installs easily with just an adjustable wrench. Installing the pump could range from easy DIY to moderately difficult depending on how your water heater was installed. If you have braided stainless steel wrapped hoses or flexible copper connecting the water heater to your house plumbing, it will be as simple as using an adjustable wrench to remove the connection to the WH and installing the pump with the same wrench. (Don't forget to turn off the water, the water heater, and drain a little off the top of the WH tank) If your WH was installed like mine, you will need some plumbing skills which may include cutting and soldering pipe and measuring and installing fittings . If you don't feel comfortable with these skills, a plumber could easily do this part for you. It took me about 10 min to install the under-sink unit (including cleaning out under the sink so I could reach the connections) and 3 hours to install the pump (including 3 trips to the hardware store). All in all, well worth the time, money, and effort. I expect this unit to pay for itself in a few years based on energy and water savings.

I can honestly say this is probably the most cost effective way of getting hot water to far places in a home, Our home 12 years old is roughly 3000 sq ft 2 story with 4 full baths with the master being at the most furthest point of the home upstairs roughly 100+ feet away from the hot water tank in the garage between the master bath sinks, jetted tub and shower I would have to wait almost 4 minutes of water running before it got warm then cold. The water lines used throughout the home are PEX non metallic plumbing. The pump and sensor unit are very easy to install on your own with a bit of common sense and took me about 40 minutes to install. I let the pump do it's thing for about 30 minutes went up to the 2nd sink in the master bath, which is the last and furthest in the home only 3 feet further than the 2nd sink, within approx 3 secs the water was warm to the touch followed by hotter water very shortly thereafter. I had my wife verify this later that evening, we would usually waste a bunch of water filling up the jetted tub or turning on the shower waiting on hot water, again within seconds the water was warm then hot! I was very amazed as I was getting prepared to drop a few thousand $$$ to have a Tankless installed just for the upstairs master bath I am very pleased with this system. Now I have seen where some people are concerned about cost to run this etc. first it waste no water so right there whatever the cost should be outweighed in water savings. Second I have seen people mock those about putting this on a smart timer since it already comes with a built in timer, what those doing the mocking are not realizing is that if the power goes out then the built in timer does not keep its correct time once power is restored, Yes I'm sure for many this is probably a very rare thing, but I can tell u you here in Northern CA the power especially in the summer is 50/50 at best! So yes I would highly suggest the use of a smart plug for one of these, I already have dozens of smart plugs/lights & switches in use at my home so I did not need to purchase one but they can be purchased for less than $25 I recommend Tp-link by Kasa! The other nice thing about the smart plug especially if it has the energy monitoring option (Not all do get one with the monitoring) is that you can get a real time look at what the power consumption is daily, weekly and yearly to kind of give you a idea of the Electric use which is not bad. The pump averages right around 22 watts +/- while running the company states is should be less than a nickle a day or so to run 24 hours. I may set up a schedule or Alexa routine but currently I have not having 48 345 watt solar panels and Battery I am not to concerned about 22 watts running. On to the gas usage, given we have a large home along with large heated pool/Jacuzzi and outdoor gas fireplace etc. we have a very large diameter gas line with a smart meter. I can always here the meter gurgling so to speak when any of the large items are being uses including the hot water tank, to date after checking numerous times I have yet to hear the gas meter or the actual hot water tank firing constantly, not saying it does not fire up once enough coldwater gets pushed back into it I am just not hearing it like a normal tank being heated up! So again I do not believe that the complaint of this using mass amount of utility to use 24/7 again as compared to dupping 100s of gallons a day down the drain I fully believe at best it is a gain in savings at worse it is a break even! I did have to purchase a second sensor kit to place in the kitchen downstairs as our home has a branched Hot water line since doing so even our kitchen sink water is now warm to hot within seconds. I have yet to experience the so called major bleedback into the cold water line that some have stated happens that when they turn on the cold water it is warm to hot for a brief moment, either way even if I did it is still worth every penny for this setup!

I don't particularly write a lot of reviews on amazon, but I wanted to review this because there are some points shoppers should be aware of before buying and installing this. First, I am not a plumber, but as a home owner, I do have experience replacing sink faucets, valves and braided water lines, so installing this was fairly simple. No crazy tools required either. It took me about 45 minutes from start to finish. I installed the valve at the furthest sink from the water heater, and after getting the timer set and allowing it to run for about 30 minutes, I could definitely here the water flow at the sink valve, which is good. That means it's working! The water is NOT instant hot, but starts warm, and gets hot MUCH quick than before, which was probably 2 minutes. Now its 20-30 seconds to get max hot. Some cons i've noticed after having it installed, is that cold water from the sink the valve is installed at, is almost impossible to get. At best, the water is room temperature, but never cold. I guess that is the trade off of having the valve installed at that sink. Hot water is much quick to rest of house, but this sink no longer gets cold water. Also, it's either a huge coincidence, or this valve/water flow caused the faucet at the valve to spring a leak under my sink. I was forced to replace the faucets in the master bathroom (both so they matched). In this products defense, I noticed while at home depot, that whoever installed the faucets bought the cheapest $20 special, so no surprise it failed. I replaced with Moen faucets, so I will be shocked if they leak. Product was definitely worth it in my opinion. Our shower required 3 minutes to get hot water in the past, and now it's less than 30 seconds.

I wanted to wait a while before reviewing this device to gauge it effectiveness. It's been installed about a month now. I have a 2000 square foot home sitting on a slab, so my water lines (Pex) are in the attic. Although it does not get terribly cold in Southern California during the Winter, it used to take upwards of 30 seconds before the water would get warm. That was a lot of perfectly good water going down the drain. After installing this device, it now takes only 5-7 seconds before the water starts to warm up. Interestingly, the closer the faucet you are opening is to the valve, the sooner your water will become warm/hot, so I find that the sink next to the one with the valve (in our master bathroom) gets the water warm-to-hot within just a few seconds. It's important to tell you that the water will not be piping hot and waiting for you right when you turn on the faucet, but the amount of time, money & water you will save is still worth it. The pump attaches to the top of your water heater and is VERY quiet. After installation, I had to touch it to make sure it was running. Although I have mine set to "On" 24 hours a day, I appreciate the timed feature that allows you to turn it on and off at certain times of the day. It runs on 110 volts, so you may need to buy an extension cord to plug it into an outlet in your home or garage if it's not close to an outlet. As mentioned elsewhere, check the WATTS website before buying as apparently this device will not work with all water heaters. I failed to do this, but I was lucky. Also, it will not work with a tankless heater so do not try it! As far as installation goes, I'm fairly handy around the house, but plumbing is not my strong suit and I scoffed at the notion that I could install this in one hour. However, it took just a little over one hour (as advertised) to install with the only hiccup being a crowded space under the sink where the valve was installed, causing me to get creative with the hose routing and placement. Don't feel like you have to mount the valve to the wall. Mine is working just fine without mounting. I didn't even need to bring out my plumber's tape/pipe dope because everything sealed up great the first time. As an aside, while you have your water heater dismantled, go ahead and drain it. It's probably been a while. My wife was thrilled when I (finally) installed this device after maybe 3 years of her asking. She heartily recommends it and so do I.

We have been in this house for 6 years and have been frustrated with how long it takes to get the hot water from the tank to the bathroom. We were always washing hands and brushing teeth with very cold water, and running the tub for a long time before any hot water got there. Finally I found out about this product. I wasn’t too enthusiastic about using the cold line as a return. I thought that would result in warm water when we wanted cold. Also I replaced my tank a couple of years ago and the new tank has a heat trap so I read that it would be a problem with the proper operation of this unit. But my research found that worst case was that I could remove the heat trap on the hot side and replace it with a plain nipple so I decided to purchase the unit and try it out. Installation was fairly straight forward although I had to remove a section of copper pipe and solder it back together, but that was a minor task for me. The hardest part of the installation was tightening the fitting onto the outlet side. There is nothing on the pump housing designed to put a wrench on to stop the pump from turning. I had to put a crescent wrench on the housing where it bolts together which had me a bit concerned about cracking the housing. It did turn out ok though. I got it all installed and fired it up. It is quiet, slight hum, but it is located in an unfinished b a segment (cellar really) so unless I go down there I can’t hear it. The great part is that the heat trap has not interfered with the operation at all. I get hot water at the bathroom sink and tub almost immediately. This makes me very happy every time I turn on the tap. I don’t use the timer at all. I installed a smart outlet linked to a phone app so I can shut off the pump whenever I need to (like if we are going away) but so far the pump runs 24/7 since we are home most of the time, and we want hot water at the bathroom even in the middle of the night. One bonus is that I also get hot water sooner at the kitchen which is on a different branch but it tees off about 10 feet after the tank, so its already about ⅓ of the way there. I may upgrade with an additional valve under the kitchen sink but I am thinking that I will be ok with it the way it is for now. It has been about 2 weeks since install and I am very happy with this pump system.

The pump and temperature bypass valve have been installed for approximately 1 week and so far so good. I had a concern that the cold water line would be too warm with the hot water bypassing into it to maintain hot water lime temp but not too bad. The cold water from the faucet at the bypass valve sink is at about room temperature. It is a trade off to have room temp cold water instead of icy cold-cold water at the tap since I didn't have to plumb in a return line. I did install a downstream ball valve so the HWH & pump can be isolated if anything requires service in the future The pump has been running 24/7 as I have yet to program the timer so not sure how that is going to work.

I really like this product,it definitely does what it’s supposed to.I used to have to wait approximately 60 seconds before getting hot water to my upstairs bathroom.Since installing the watts 500800 the hot water is instant. I decided I would set the timer for a couple of hours in the morning,and then another couple of hours in the evening.To my surprise I had hot water upstairs all the time. The only problem is that the hot water was creeping 24/7 .Where I live we heat our water with furnace oil which doubled in price this past year.Because of this I really didn’t want my hot water heater coming on way more keeping the lines warm 24/7. I unplugged the pump for a couple of days just to see if it was actually creeping for sure .In my case the sensor valve was keeping the hot water moving/creeping even when the pump was shut off. To fix this I installed a check valve on the cold line going to the upstairs,now the creeping has stopped. Now it only works when the timer tells it to which is perfect.To summarize I am happy with the pump but would recommend installing a check valve on the cold to eliminate any possible creeping

We've only had the pump for about a month but it is working as expected so far. Too soon to know about durability. It replaced a Grundfos pump that only lasted about a year. The previous Grundfos pump ran for 6 years. That model is no longer available so we needed something different and the Watts pump was a lot less money. I had to reroute some plumbing and change some fixtures but I'm handy enough with copper-and-solder DIY plumbing that it was a fairly easy job. We don't use the pump the way most customers will, though, so I can't say how well it works in that specific application. When we built the house we had a loop of pex installed in the floor joists, that runs around the perimeter of the house, with all hot water taps and appliances feeding off that loop. The pump circulates hot water continuously through the loop and we have hot water at all outlets within about 6 seconds. Without the pump, the kitchen sink faucet takes at least 2 minutes to come up to full temperature, so we're happy with our setup. The pump is mounted just above the hot water heater. Future replacement with a pump of the same design will be easy, as I have shut-off valves installed before and after the pump to isolate the pump from the system - no need to turn off water to the rest of the house during replacement - and fittings that I can simply unscrew with a pipe wrench to remove the old pump and tighten back up the same way to install a replacement. I may buy another one or two of these pumps to have on hand for when replacement is needed. Being mechanical devices, they don't last forever, so the day will come.

If you are handy this can easily be installed by yourself. Our previous water circulator stopped working and the timer on this one is a nice feature. We don’t even notice this one running. The previous unit was a bit noisier. It is a super bonus to no longer having my wife complain about cold water and having to let the tap run for a long time to get hot water to the tub and sink on the second floor. We have hot water instantly, so the saving on water alone is well worth the cost. Strongly recommend if you are running a tap for quite a while to get hot water.