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Watts Premier WP596816 Replacement Sensor Valve Kit for Instant Hot Water Recirculating Pump System, 2 x 12 Inch Supply Lines & Valve

4.5 4.5 out of 5 stars 6,932 ratings
$68.95
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2 x 12 Inch Supply Lines & Valve
Kit
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Purchase options and add-ons

Material Stainless Steel
Brand Watts Premier
Item dimensions L x W x H 12 x 2 x 2 inches
Exterior Finish Silver
Inlet Connection Size 0.38 Inches
Inlet Connection Type National Pipe Tapered
Valve Type hot water supply line

About this item

  • Must be used in conjunction with Watts Instant Hot Water Recirculating Pump, this item; for branched hot water lines ensuring hot water throughout; no additional pumps needed, install at the branched water lines or at furthest point in the home
  • Kit includes one sensor valve, two 12 inch supply lines with fittings, and two mounting screws; uses 1/2 inch male pipe thread connections, 1/2 inch FTP to 3/8 MTP supply lines and 1/2 inch FTP to 3/8 inch MTP supply adaptors
  • Extremely quiet and energy efficient this system supplies instant hot water in about 15 seconds at every faucet or shower when needed and helps eliminate wasted water using thermal by-pass technology with no return line or under-sink outlet required
  • A sensor valve opens when the water on the hot water side cools, pushes the cool water back to the water heater, and closes when hot water line hits 98º F; this kit is used if multiple hot water loops present
  • Can be used with all types of pipe, and is only for indoor use on standard tank water heaters for residential buildings; cannot be used with tankless water heater or outdoors
› See more product details

Customer ratings by feature

Easy to install
4.5 4.5
Noise level
4.5 4.5
Temperature Control
4.3 4.3
Longevity
3.9 3.9
See all reviews
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Watts Premier WP596816 Replacement Sensor Valve Kit for Instant Hot Water Recirculating Pump System, 2 x 12 Inch Supply Lines
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From the manufacturer

watts, watts premier, instant hot water recirculating pump, recirculating pump, recirculating system

Premier Hot Water Recirculating Pump Sensor Valve Kit

Valve Kit

Features

  • Includes a sensor valve, two 12 inch supply lines with fittings and two mounting screws
  • Does not require any additional pumps for your hot water line
  • Extremely quiet

Why install a Hot Water Pump?

Why need a sensor valve?

Enjoy hot water at every faucet or shower in your home with the Watts Instant Hot Water Recirculating System. Designed for homes with a branched hot water line, this kit offers convenience and savings by delivering hot water when you need it.

How does it work?

This recirculating pump eliminates water waste caused by waiting for water to heat up. The device uses the pump at the water heater and a patented under-sink sensor valve to create a pressure differential. The pressure differential allows the cold and cool water in the hot water supply line to bypass into the cold water supply line at a low volume through the thermostatically controlled sensor valve, keeping the water in the hot water supply line at a "no-wait" temperature throughout the home.

Hot water

Step by Step Installation Guide

Hot Water Pump

Sensor Valve

Valve Kit

Step 1 - Installing the Pump

A pump with a built-in timer mounts directly on the hot water line from the water heater with 3/4" connections.

Step 2 – Installing the Sensor Valve

A patented sensor valve opens when the water on the hot water side cools and pushes the cool water back to the water heater. As the temperature in the hot water line hits 98º, the valve closes.

Step 3 – Installing Sensor Valve Kits

If one section of your home does not receive hot water, you will need to purchase a Watts Sensor Valve Kit for each hot water loop. For best results, the valve should be located at the faucet furthest from the water heater in each loop.

Fetched from B00QGX9LV4.

G31SL Lead Free Brass In-line Spring Check Valve

  • (3/4”) 1.35 PSI cracking pressure (1”) 1.6 PSI cracking pressure (1 1/4”) 6.5 PSI cracking pressure
  • For pump and compressor discharge cooling towers, HVAC systems, pressure pumps, sump pumps, condensate line, boilers and other applications to prevent backflow
  • Install a minimum of 5 X pipe diameter down stream of any fitting that can cause turbulence
  • Spring actuated
  • Resilient seal

Product information

Technical Details

Additional Information

Warranty & Support

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User manual User Guide [PDF ]

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Watts Premier WP596816 Replacement Sensor Valve Kit for Instant Hot Water Recirculating Pump System, 2 x 12 Inch Supply Lines & Valve

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Product guides and documents

Installation Manual (PDF)
User Guide (PDF)

Product Description

The Premier WP596816 Replacement Sensor Valve Kit for Instant Hot Water Recirculating Pump System must be used in conjunction with Watts Instant Hot Water Recirculating Pump. This kit is for branched hot water lines ensuring hot water will be distributed throughout the home. No additional pumps needed just simply install at the branched water lines or at furthest point in the home. A sensor valve opens when the water on the hot water side cools, pushes the cool water back to the water heater, and closes when hot water line hits 98º F; this kit is used if multiple hot water loops present. Can be used with all types of pipe, and is only for indoor use on standard tank water heaters for residential buildings; cannot be used with tankless water heater or outdoors.

Top Brand: Watts Premier

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Customer reviews

4.5 out of 5 stars
4.5 out of 5
6,932 global ratings

Customers say

Customers like the timer and performance of the water pump. They say it works excellent, it saves water and works with tankless water heaters. Customers are also satisfied with the ease of installation and water pressure. However, some customers feel the value of the product is overpriced. They disagree on noise and quality.

AI-generated from the text of customer reviews

1,078 customers mention921 positive157 negative

Customers like the performance of the plumbing fixture. They say it works excellent, has a timer to turn off when sleeping, and is almost silent. They also say it saves time and money, and it's the most cost effective way of getting hot water to far places in a home.

"...The timer works great so we turn the pump off at night and when we’re out of town. Wish we had this over the last 20 years...." Read more

"...Works perfectly now. This could be a do-it-yourself install if you are still young enough to work under a sink. I'm not!..." Read more

"...Followed the instructions after watching a video and it went perfectly...." Read more

"It worked as expected. If you dont have an outlet within 6' of your water heater you will need to add a 120v outlet...." Read more

767 customers mention735 positive32 negative

Customers find the installation of the plumbing fixture to be easy. They mention that it's simple and much easier than they anticipated. Some say that the outlet installation took the longest. Overall, most are satisfied with the ease of installation.

"...The recirculating pump and sensor valve with thermal actuator were easy to install on our hot water heater and under the kitchen sink...." Read more

"...Installation was straight forward, hardest part was taking my time to prevent damage to the existing pipes...." Read more

"...Overall, very happy with the ease of installation and operation of the pump. I'll likely pay for it on saved water bills." Read more

"...Both sides of the installation were fairly easy. Installing the outlet took the longest. The motor uses 25 watts...." Read more

637 customers mention471 positive166 negative

Customers like the water pressure of the plumbing fixture. They say it provides almost instant hot water, brings hot water to the master bath, and pleasantly warm water. The sensor bridges both hot and cold water, so that the pump can push hot water on the cold side. This product makes cold weather easier, and makes tepid water available immediately. Some say it saves water in some situations.

"...Wish we had this over the last 20 years. It even brings hot water to the master bath." Read more

"...hot water and within 30 seconds (used to be about 3-5 minutes), shower was warm. Wife is real happy." Read more

"...No leaks, almost immediate instant hot water, even though house is 4200 sq ft and hot water tank is at one end and master bath is opposite end...." Read more

"...Pump was running just fine, but no hot water! Watts Tech Support is only so-so and that took it from 5 Star down to Four...." Read more

167 customers mention157 positive10 negative

Customers are satisfied with the water saving of the water pump. They mention that it saves a ton of water, and in a few years it will save you money in reduced water usage. It works well and saves both water and time in the morning. The water bill dropped dramatically, and there is very little wasted energy.

"...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..." Read more

"...We LOVE it - INSTANT HOT WATERNo more wasting water waiting for hot water5 stars is not enough..." Read more

"...No more wasting water!" Read more

"This pump is SO GREAT! It saves water, time and sanity!Installation was simple and took about an hour...." Read more

152 customers mention106 positive46 negative

Customers are mixed about the noise of the water pump. Some mention that it's extremely quiet and never hear it, while others say that it makes a very faint humming sound.

"...Super quiet by the way. The unit basically sits right above our bed and can't be heard at all...." Read more

"...But it literally has no sound. Our house is a single floor, but long. The back bathroom is 50' from our water heater...." Read more

"...It is made by Grunfos, a bonus, and is very quiet and uses half the wattage as the old one. Easy screw-on 3/4 inch fittings...." Read more

"...The description says very quiet. Really? Mine hums so loud I can hear it throughout my house, even when the door of the utility room is closed...." Read more

141 customers mention99 positive42 negative

Customers like the timer on the water pump. They mention it's helpful, reduces electrical consumption, and is easy to set. Some say the built-in timer allows for off and constant on.

"...The pump has a built-in timer, but if the power goes out, I didn't want to have to go up and reset it, so I bought a Kasa wifi controlled outlet..." Read more

"...A timer reduces electrical consumption. The only tool you need is a crescent wrench or adjustable pliers...." Read more

"...They are not designed to run for 24 hours because the pump will fail in a short amount of time. There are 1440 minutes in 24 hours...." Read more

"...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..." Read more

318 customers mention169 positive149 negative

Customers are mixed about the quality of the water pump. Some mention it's a good quality item that is easy to install, while others say that it started failing after about 9 months. Some say that the pump would stop and start when moved around and that it only last about 5 years.

"...this is also great for my bathroom sink - before I used to wait about a minute to get hot water, and now, less than 10 seconds...." Read more

"...Seemed to work immediately after installation but stopped recirculating later that day. Pump was running just fine, but no hot water!..." Read more

"...This is a good brand, identical to the original, thus easily installed and works great." Read more

"...Yes, the mechanism looks like a cheap plastic tube, but what that little gadget does is worth every penny." Read more

93 customers mention8 positive85 negative

Customers are dissatisfied with the value of the water pump. They mention that the valve seems to be overpriced, the sensor is pricey, and it's too expensive to replace that often. Some say that the product is a waste of money and that it'll only work with poorly plumbed homes.

"Works as described way over priced, one star for tech did not use it self explanatory, if you can read the enclosed instructions … then you should..." Read more

"...But, the part is about $55. That seems a little high. I might do it anyway, but I'd rather the part be $25...." Read more

"This is my 2nd sensor & I think they’re overpriced as an addition to the recirculating unit already purchased but instead of counting to 30 or more..." Read more

"...I agree with others who say the valve seems to be overpriced, but replacing the valve is a cost-effective option compared to shopping for and..." Read more

Hot water
5 Stars
Hot water
It worked as expected. If you dont have an outlet within 6' of your water heater you will need to add a 120v outlet. We've had cold water in the kitchen for years and now it is warm immediately and hot within a 10-20 seconds. Both sides of the installation were fairly easy. Installing the outlet took the longest. The motor uses 25 watts. 25 watts of usage = 25 watt hours per hour. If you have it timed to run 16 hrs a day at 30 days a month = 12000 watt hours a month or 12kw hours a month. 12 to 15 centes per kwhour (Texas) = $1.80 per month added to the electric bill. We'll worth it SO FAR.
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Top reviews from the United States

Wendy R.
5.0 out of 5 stars Great recirculating pump - instant hot water
Reviewed in the United States on March 27, 2024
Color: 6.2 Inches X 6.0 Inches X 5.0 Inches Device + EquipmentStyle: PumpVerified Purchase
We finally have hot water in the kitchen. The recirculating pump and sensor valve with thermal actuator were easy to install on our hot water heater and under the kitchen sink. The timer works great so we turn the pump off at night and when we’re out of town. Wish we had this over the last 20 years. It even brings hot water to the master bath.
One person found this helpful
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Hello
5.0 out of 5 stars Worth the price
Reviewed in the United States on April 14, 2024
Color: 6.2 Inches X 6.0 Inches X 5.0 Inches Device + EquipmentStyle: PumpVerified Purchase
We’ve lived in the same house close to 20 years now and master bathroom shower always took a long time to get hot that we waste water leaving it on or I just take I shower down stairs. I like this unit because our water heater is in the garage and if the main unit was to leak due to failure, I dont have to worry about water damage. Installation was straight forward, hardest part was taking my time to prevent damage to the existing pipes. Just tried our hot water and within 30 seconds (used to be about 3-5 minutes), shower was warm. Wife is real happy.
2 people found this helpful
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Mickey R. Davis
5.0 out of 5 stars Works Great--Added a wifi outlet to schedule without getting into the attic
Reviewed in the United States on February 18, 2024
Color: 6.2 Inches X 6.0 Inches X 5.0 Inches Device + EquipmentStyle: PumpVerified Purchase
Our kitchen sink is a ways away from our water heater in the attic. Typical time to wait for hot water was 85 seconds. Installed this puppy and now have hot water in 4-5 seconds! It is remarkable. Two notes on my install. First, I'm pretty handy and could easily have done this myself but for one thing. I don't sweat copper pipes, and the hot water line out of my water heater was soldered copper all the way. So rather than mess this up, I called a plumber to install. He said he'd put in a lot of these units and customers rave about them.

Second, I have an electrical outlet in the attic maybe 6 feet from the water heater, so we just plugged the pump in and it worked. Super quiet by the way. The unit basically sits right above our bed and can't be heard at all. The pump has a built-in timer, but if the power goes out, I didn't want to have to go up and reset it, so I bought a Kasa wifi controlled outlet ($13 for 2 on Amazon). I left switches on the pump "on" 24/7 but have the wifi outlet scheduled for 6 am to 9 am and 5 pm to 10 pm so it doesn't run while we are away or asleep. I can always turn it on or off from my phone or through Alexa. The plumber hadn't seen that setup and will likely be suggesting it to his customers going forward.

Overall, very happy with the ease of installation and operation of the pump. I'll likely pay for it on saved water bills.
21 people found this helpful
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James T. Davenport
4.0 out of 5 stars Awesome Once Installed and Running
Reviewed in the United States on December 8, 2023
Color: 6.2 Inches X 6.0 Inches X 5.0 Inches Device + EquipmentStyle: PumpVerified Purchase
Hired a plumber to install. Seemed to work immediately after installation but stopped recirculating later that day. Pump was running just fine, but no hot water! Watts Tech Support is only so-so and that took it from 5 Star down to Four. Took forever to get anyone on the phone. They suggested removing the 'Heat Traps' from my water heater. I had the plumber come back. He just chuckled and moved the pump from the hot water side of the water heater to the cold water side. Works perfectly now. This could be a do-it-yourself install if you are still young enough to work under a sink. I'm not! Finally got the whole-house connected, took a total of three cross-flow valves under three different sinks to get it completely going. Villan was an R/O System under the kitchen sink. One plumber would not install the cross-flow valve because of the R/O plumbing. Finally got a competent plumber to do the install and it works great.
6 people found this helpful
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Dennis Garris
5.0 out of 5 stars Works great!
Reviewed in the United States on April 24, 2024
Color: 6.2 Inches X 6.0 Inches X 5.0 Inches Device + EquipmentStyle: PumpVerified Purchase
Love this pump. Followed the instructions after watching a video and it went perfectly. No leaks, almost immediate instant hot water, even though house is 4200 sq ft and hot water tank is at one end and master bath is opposite end. Even able to screw/mount the under sink part and has a nice clean installation look. Wish I would have done this sooner, but the wife is happy now and we aren't wasting water, especially in the winter waiting on hot water. I used a smart plug instead of the timer so I can set schedules to come on and off when I want, plus I named it "hot water" and now Google can just turn off or on when we want, love our smart home too!
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Charles N.
5.0 out of 5 stars Hot water
Reviewed in the United States on April 12, 2024
Color: 6.2 Inches X 6.0 Inches X 5.0 Inches Device + EquipmentStyle: PumpVerified Purchase
It worked as expected. If you dont have an outlet within 6' of your water heater you will need to add a 120v outlet. We've had cold water in the kitchen for years and now it is warm immediately and hot within a 10-20 seconds. Both sides of the installation were fairly easy. Installing the outlet took the longest. The motor uses 25 watts. 25 watts of usage = 25 watt hours per hour. If you have it timed to run 16 hrs a day at 30 days a month = 12000 watt hours a month or 12kw hours a month. 12 to 15 centes per kwhour (Texas) = $1.80 per month added to the electric bill. We'll worth it SO FAR.
Customer image
Charles N.
5.0 out of 5 stars Hot water
Reviewed in the United States on April 12, 2024
It worked as expected. If you dont have an outlet within 6' of your water heater you will need to add a 120v outlet. We've had cold water in the kitchen for years and now it is warm immediately and hot within a 10-20 seconds. Both sides of the installation were fairly easy. Installing the outlet took the longest. The motor uses 25 watts. 25 watts of usage = 25 watt hours per hour. If you have it timed to run 16 hrs a day at 30 days a month = 12000 watt hours a month or 12kw hours a month. 12 to 15 centes per kwhour (Texas) = $1.80 per month added to the electric bill. We'll worth it SO FAR.
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2 people found this helpful
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James A. Holland
5.0 out of 5 stars works great. saw it on This Old House.
Reviewed in the United States on April 30, 2024
Color: 6.2 Inches X 6.0 Inches X 5.0 Inches Device + EquipmentStyle: PumpVerified Purchase
I'm no plumber but it was easy to install. You can easily set it to turn off over night or any time you want. I have started leaving it on 24/7. Big improvement over running the water before it gets hot, even in the middle of the night. You can only hear a low buzz when it is perfectly quiet in the room. No problems after more than a year.
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Ben
5.0 out of 5 stars Instant Hot water
Reviewed in the United States on March 29, 2024
Color: 6.2 Inches X 6.0 Inches X 5.0 Inches Device + EquipmentStyle: PumpVerified Purchase
I bought this on a neighbor’s recommendation. Pretty straight forward install after watching a few YouTube videos. Hardest part was getting the thermal valve installed under my sink with the little amount of room. Water comes out hot when turned on but still takes some time to fully heat up if you like your showers HOT. Also be prepared for your cold water side to be slightly warm when first turned on since that is the line that returns water to the pump to keep the hot water flowing. Great product overall so far. Highly recommend and wish I installed it sooner.
Customer image
Ben
5.0 out of 5 stars Instant Hot water
Reviewed in the United States on March 29, 2024
I bought this on a neighbor’s recommendation. Pretty straight forward install after watching a few YouTube videos. Hardest part was getting the thermal valve installed under my sink with the little amount of room. Water comes out hot when turned on but still takes some time to fully heat up if you like your showers HOT. Also be prepared for your cold water side to be slightly warm when first turned on since that is the line that returns water to the pump to keep the hot water flowing. Great product overall so far. Highly recommend and wish I installed it sooner.
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4 people found this helpful
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Top reviews from other countries

Bryan
5.0 out of 5 stars Fantastic product works like a charm
Reviewed in Canada on April 23, 2024
Color: 4.5 Inch Sensor ValveStyle: ValveVerified Purchase
Originally bought the Navien navicirc recirculation valve as I had just installed a Navien water heater the water heater is great but the navicirc valve was horrible it howled like a cat in heat. Left all plumbing the same just installing the watts valve works perfectly very happy with my purchase. Valve on left is watts 1/2 the size of navicirc right
Customer image
Bryan
5.0 out of 5 stars Fantastic product works like a charm
Reviewed in Canada on April 23, 2024
Originally bought the Navien navicirc recirculation valve as I had just installed a Navien water heater the water heater is great but the navicirc valve was horrible it howled like a cat in heat. Left all plumbing the same just installing the watts valve works perfectly very happy with my purchase. Valve on left is watts 1/2 the size of navicirc right
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bcbeemer
5.0 out of 5 stars Works well
Reviewed in Canada on November 11, 2021
Color: 6.2 Inches X 6.0 Inches X 5.0 Inches Device + EquipmentStyle: PumpVerified Purchase
Seems high quality. Almost silent motor. Very easy to install. So nice to have warm water at our ensuite instantly and then hot water shortly thereafter. We used to wait for over a minute (which seems like forever) before installing this system.
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ollie
4.0 out of 5 stars Kitchen
Reviewed in the United Kingdom on June 7, 2023
Color: 2 x 12 Inch Supply Lines & ValveStyle: KitVerified Purchase
Large water system so attachments re-rerouted hot water better
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Rex Petersen
1.0 out of 5 stars Neither sensor valve worked on hot water line. Rubbish
Reviewed in Australia on September 25, 2022
Color: 2 x 12 Inch Supply Lines & ValveStyle: KitVerified Purchase
Fitted under sink in hot and cold water lines and cold water unable to travel thru unit. Tried second valve same result watts thermatic valves are rubbish.
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Mark
5.0 out of 5 stars Instant hot water
Reviewed in Canada on March 23, 2024
Color: 4.5 Inch Sensor ValveStyle: ValveVerified Purchase
I bought this product because I always had to wait for the hot water to reach my upstairs bathroom. After installing this sensor I now have instant hot water at this bathroom . Very happy with the way it works.
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