Features:

  • WATTS HOT WATER RECIRCULATING PUMP: Provides hot water at every faucet or shower when needed, eliminating wasted water , 0.5 inches bypass value
  • BEST SELLER RECIRCULATING SYSTEM: Conserve Water - Up to 15,000 gallons of water per year. Save Money - Up to 10% of your water bill and its cost only 5 a day to operate
  • EAST TO INSTALL: This unique product connects easily to existing plumbing. Easy to install in less than 1 hour. And it is maintenance free
  • WATTS HOT WATER RECIRCULATING SYSTEM: The Kit Includes: Pump with timer, 2 adapters with rubber washers, valve mounting screws, sensor valve, two 12-inch supply lines
  • RECIRCULATING PUMP WITH TIMER: 24-hour programmable timer activates pump when you need it. And it is extremely quiet compared to other system in the market - no vibrations. Do not use with tankless water heaters. Insert the 115V plug on the line cord from the pump into a properly grounded 115V outlet
EASY to Install and excellent product

This is an outstanding product. Very easy to install. All you need to install is pipe wrench to remove the cold water feed pipe fitting. The easiest way to make the connection is purchase a SharkBite 22441LF 3/4-Inch FNPT SharkBite available from Amazon. Took about an hour to install. Hopefully you will have an electrical outlet near the hot water tank. The pump will operate on a timer, always on or off. Hot water available at every faucet without waiting for gallons of cold water exists the pipe. Glad I purchased this item.

Great Product at a Great Price

I purchased the Watts 500800 Hot Water Recirculating unit as a replacement for the like one I initially installed in 2012. The old unit lasted a little over 4 years and performed flawlessly. We have extremely hard water in our area and after breaking down the old unit it appears the calcium buildup caused the circulating portion of the unit to slow down to the point in could no longer push enough hot water through the system to be effective. Having said that, four solid years of service, in my opinion is extremely good value! I won't hesitate to purchase this same unit when the next replacement is required. If it takes you several minutes to get hot water to run from your facets (extended distance from the water heater to facets outlets) then this is the product for you. I can guarantee it will save you enough money on your water bill to pay for itself in no time.

Watts 500800 Hit Water Recurculating System

Great product, at a $50 less than the two big box stores, plus no tax. This pump is extremely easy to install, but it isn’t necessary to go to the extremes of shutting off the gas and draining the hot water heater, which may create a leak problem in old heaters. Turn off the cold water valve at the top of the heater and turn on the hot water faucet in the house. I drained a bucket of water, from the water outlet, located at the bottom of the water heater and then loosed the 3/4” hot water outlet nut slightly, on top of the water heater, to allow the air to drain the water back out of the pipes, so you don’t have it all over you and the heater, like I did on the first one I installed. Then install the pump, as directed, turn the water back on, then go in the house and turn off the hot water faucet. Determine where you want to install the sensor, turn off both faucets and install the sensor. If both faucets won’t turn completely off, find another location nearby and try that one, as a last resort simply turn off the water to the house, but be sure to leave a cold water faucet on so that when you turn the water back on all the air will purge from the pipes. This recirculating pump will definitely give you quick hot water, like you haven’t had in the past, but you will now get lukewarm water out of the cold water faucets, when the pump is on, not cold water like before. I consider this a small trade off for the comfort and convenience of a nice hot shower, without standing around wasting water, while you wait for the water to warm up.

Less wasted water and hot water (nearly) on demand.

Easy to install but the timer is a bit dated. Trying to do our part during the drought, a friend recommended this. I struggled to figure out how it could recirculate water without a separate return line, but a close examination of the online manual showed it relies on a simple "sensor" to pump water back down the cold water line and into the hot water tank. It installed quickly but I'd make the following suggestions. Don't try turning off under sink valves when you install the sensor. If they are frozen in the on position like mine, and you're asking for leaks to wrench those handles. Just turn water off at the main. Also, if you hope to minimize pump run time to just when you need hot water, like for a shower, the timer on the device is not convenient to reach after installation nor adequate unless you are a creature of habit, expecting to shower at the same time each day (including weekends). I plugged the pump into a Belkin Wemo wifi programmable outlet and can now program and/or turn it on from my phone as well as the touch switch built into the receptacle. It also shows power consume by the pump. It looks like less than $0.50/month so far. A small con is about 5 seconds of tepid water when turning on cold at the "sensor" sink. The biggest con is the pump, while nearly silent, takes about 30 minutes to heat the water through the return line, requiring we know well enough in advance when we desire hot water. Also, in the "no free lunch" category, while saving water, we're spending some on electricity for the pump ($0.50/month?) and likely even more on gas heating the extra 5 gallons of water in the pipe that we don't immediately use. Still, better than running cold water in the tub and flushing the toilet with a bucket while waiting for hot water for the shower!

Convenience and cost-savings

Without the recirculating pump, getting hot water to our upstairs master bathroom could take up to 5 minutes of running faucets or the shower. After about 6 weeks of having this in place, I have to say that I am very happy with it. I have the timer set to come on between 5:00 and 11:00 AM and 5:00 and 11:00 PM -- but I also have it alternating to be on for 15 minutes and then off for 15 minutes during those times. So far, I have yet to wait more than a few seconds for hot water. I haven't seen a full month water bill with the pump but the water savings should be significant. I had a friend who is a plumber help me install it, but realized that it would have been fairly easy for me to do myself. I saw a couple of reviews complain about having warmer water coming from the cold side of the faucet. The pump works by moving colder water in the hot line back to the water heater through the cold side. Consequently, if the hot water faucet has not been used for a while, the cold side will be less cold than usual for the first few seconds, after which it will return to the normal cold-water temperature fairly quickly. The bottom line is that it is a reasonably minor inconvenience that is more than offset by the benefits. Along with the cost savings, just being able to wash you hands with warm water, or to get directly into a hot shower on a cold morning without having a long wait definitely makes it worthwhile.

Installation is easy if you use SharkBite fittings (remove the inner sleeve ...

Wow! This really works as advertised. Installation is easy if you use SharkBite fittings (remove the inner sleeve for anything other than PEX!). If not, a plumber can do it in 20 minutes. I put 2 thermostats on the system, one on each end of the house. We now have almost instant hot water at all taps whereas we were waiting 1 and 1/2 minutes by the clock before just for warm water! I can't believe I did not know a product like this existed. You will not be disappointed. FYI: You cannot even hear the pump running it is near totally silent. I scheduled this to go on between 7am and 8pm.

Great Product

Recently installed in residential application with copper pipe-in-slab with 40' run from hot water heater. Cannot comment on reliability. Installation was fast and simple. Solid build standard. Online trouble shooting guide was very clear and helpful for testing and working thru setup issues. Pump consumes only 25W while recirculating. My objective was to save water while increasing electric power consumption slightly. Found that electricity consumption was actually reduced due to shorter dishwasher and clothes washer cycle times. Recommend the following: - Remove heat traps from hot water heater before installing pump. Heat traps are typically red and blue plastic inserts with an internal ball or flap that are threaded into the water in and out lines on top of the hot water heater. Heat traps can sometimes throttle or prevent the recirculation flow. Heat traps are not required (actually counter-productive) if a recirculator is used. - If installation is in a smart home, install the recirculator pump on a smart switch (instead of the included mechanical timer) to enable more flexible scheduling and to eliminate the need to reset timer after power interruptions. - Clearly mark the four inputs/outputs of the control valve with tape or paint (red arrows for hot, blue for cold, etc.) prior to installation. The control valve is typically installed under sink, which makes reading the small black-on-black labels nearly impossible. The control valve has four inputs/outputs that must be installed correctly.

What a difference!!!!

This turned out to be another one of those things I wish I had known about long ago. Usually having to wait for warm water to flow in the shower or kitchen (furthest away from water heater), is something we took for granted. In the kitchen (due to low flow restrictions) it took anywhere from 35 to 80 seconds to get warm water there. The shower, pretty much the same. Then, I found a video clip on the internet about recirculating water using one of these devices. I ordered one, and can't be happier, no more waiting and wasting water. (paying for it for the last three years, used to be free except for low service cost) Installation turned out to be extremely easy and it works exactly as promised. One of the best investments I made!!!! Average wait for hot water (when pump is on) is about 2 to 3 seconds!!

Super easy to install, product works great!

Awesome product. Installed the pump on top of the water heater in just minutes. After you turn off the water, don't forget to drain down the water heater a bit before you disconnect the hot water outlet pipe as the hot water wants to expand out of the unit once the water pressure is off. The plastic sensor unit that goes under the sink was also very simple and easy to install. I actually rotated the existing hot and cold water valves (mine are attached with compression fittings) about 90 degrees to make the hose attachments easier. If you do this make sure to check for leaks from the valve which can be fixed by simply tightening the compression nut. One word of caution however, be very careful NOT to cross thread the metal hose fittings onto the plastic sensor. I cross threaded one of the metal nuts and it was a bear cat to get it screwed together properly to avoid a leak. I installed three sensor units, one in our kitchen and the other two in our two bathrooms. Now the kudos: First, we turn our pump on before we need hot water and let it run for a few minutes, these results are based on that action. Our guest bathroom took almost 90 seconds to get hot water to the bathtub, now it's about 15 seconds. Our master bathroom took 45 seconds to get hot water at the vanity sink, now it's instantaneous!!! Our kitchen faucet took 35 seconds to get hot water, now it takes 3 seconds!! We're very impressed with this product and are really excited to save a ton of water in the coming years. If you are good with your hands you can easily install this product and the three sensors in under an hour. If not, you should hire a plumber which will be expensive, but in the end worth it in water savings and the cost of heating your water.

Ahhh, relief!

Our house is fairly old and, despite a new water heater, it still took about 4+ minutes for even slightly warm water to reach our kitchen sink. It was wasteful and frustrating for OVER 40 YEARS! When I saw this product, I knew I had to try it. I am so glad I did. I did the installation myself with basic tools and no plumbing background. All needed parts were included and it helped that I had a nearby electrical outlet near the heater. Two suggestions: 1) There was no need to turn off and empty the hot water heater completely, as the instructions say. I only drained a few cups of sludge out of the bottom of the water heater into a small bucket before disconnecting the "hot water out" hose at the top of our gas water heater. 2) When connecting the under-sink sensor, it's MUCH better to make all the connections to the sensor itself first before crawling under the sink. CAUTION: Double-check to make sure the sensor is installed the correct side facing out so hot/cold connections aren't accidentally reversed! Total installation time was about 1 hour. As for the performance, it is quiet and efficient (I left my unit turned "on" and connected it to a smart plug for scheduling). After 40+ years of frustrating and wasteful water running, my hot water now runs immediately warm and scaldingly hot in less than 30 seconds! Now, I only waste water by turning on my taps to marvel at how great it is to have quick hot water. Highly Recommended! Still Loving it after first week!

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