---
product_id: 38311953
title: "Watts Premier Replacement Sensor Valve Kit for 500800, 500805, HWRS-WH Watts ..."
brand: "watts premier"
price: "€ 164.87"
currency: EUR
in_stock: true
reviews_count: 13
category: "Watts Premier"
url: https://www.desertcart.pt/products/38311953-watts-premier-replacement-sensor-valve-kit-for-500800-500805-hwrs
store_origin: PT
region: Portugal
---

# Tool-free, quick install with included fittings Precision 12" dual supply lines Auto-closes at 98°F for instant hot water Watts Premier Replacement Sensor Valve Kit for 500800, 500805, HWRS-WH Watts ...

**Brand:** watts premier
**Price:** € 164.87
**Availability:** ✅ In Stock

## Summary

> 🔥 Upgrade your flow, never wait to glow! ⚡

## Quick Answers

- **What is this?** Watts Premier Replacement Sensor Valve Kit for 500800, 500805, HWRS-WH Watts ... by watts premier
- **How much does it cost?** € 164.87 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/38311953-watts-premier-replacement-sensor-valve-kit-for-500800-500805-hwrs)

## Best For

- watts premier enthusiasts

## Why This Product

- Trusted watts premier brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless DIY Upgrade:** Includes all fittings and mounting screws for a seamless, no-extra-parts installation.
- • **Seamless Compatibility:** Exclusively designed for Watts 500800, 500805 & HWRS-WH recirculation systems—no guesswork.
- • **Indoor-Only Reliability:** Built tough for indoor tank water heaters, ensuring long-lasting performance without outdoor exposure risks.
- • **Optimized Water Efficiency:** Closes precisely at 98°F, reducing water waste and energy consumption.
- • **Instant Hot Water, Zero Wait:** Sensor valve activates at cooling point, pushing cold water back to heater for immediate warmth.

## Overview

The Watts Premier Replacement Sensor Valve Kit is a precision-engineered component for Watts Hot Water Recirculation Systems (models 500800, 500805, HWRS-WH). Featuring dual 12" supply lines and easy-to-install fittings, it automatically recirculates cooled water back to the heater and closes at 98°F to deliver instant hot water, saving time, water, and energy. Designed exclusively for indoor use with standard tank water heaters, this OEM kit guarantees reliable performance and effortless integration.

## Description

Designed for use on branched hot water lines coming from the water heater or at the furthest point in the home, the Watts Premier Replacement Sensor Valve Kit ensures that hot water gets to all areas of the home. It is exclusively compatible with Watts Hot Water Recirculation Systems, models 500800, 500805 and HWRS-WH. It is not designed to be used with a dedicated return line to the water heater.As an essential part of the hot water recirculating system, the sensor valve enhances the efficiency of your hot water system by opening when the water on the hot water side cools, effectively pushing the cool water back to the water heater. Once the hot water line reaches 98°F, the valve closes, ensuring that you have immediate access to hot water while reducing the wait time. This not only improves comfort but also helps in conserving water.This product is equipped with two 12" supply lines, two reducing fittings from 1/2" FTP to 3/8" MPT, and two mounting screws. With a simple design that makes it easy to install and replace, requiring no additional components or specialized tools, this Sensor Valve Kit can also be installed parallel to existing sensor valves to increase the speed of water recirculation.The Watts Premier Sensor Valve Kit is compatible with all types of pipes, adding to its versatility. However, it is designed for indoor use only on standard tank water heaters in residential buildings. It is not suitable for use with tankless water heaters or for outdoor applications.

Review: Buy this for additional fixtures not a no-name brand! - After purchasing the Watts hot water recirculating pump to deliver instant warm water to our master bathroom on the opposite side of our 1800 sqft home with a crawlspace in Georgia, I was instantly spoiled and looked into how I can have the same in our kitchen that was farther down our plumbing line path. After installing an aftermarket unit thinking that I can save 50$, I was instantly disappointed. The product was clearly subpar and did not deliver instant hot water. I immediately scheduled a refund from desertcart for this 30 dollar part, and ordered this OEM Watts bypass Sensor valve kit. Unless you are using an impact driver to install your fittings, I can't see how this would break. The fittings are sealed by a gasket and therefore only require a quarter turn past finger tight as per the manufacturer instruction. I ignored these instructions and turned about 3/8 of a turn and used a decent level of torque on "finger tight" and had no issue. This product compared to an aftermarket bypass valve was night and day. Instant hot water to the faucet, and despite the warm water in the cold water faucet (obvious hazard when installing a bypass valve) I am more than pleased. Don't waste your time installing a junk aftermarket brand. No leakage and even with the obstructions under my kitchen sink the level of difficulty of the install was intro level. Just make sure to turn off your water stops and tighten all your fittings before you turn them back on!
Review: Works like a charm, easy to program with Echo button - I purchased the pump and one sensor valve years ago and it has and still works flawlessly, my only complaint had to do with the old fashion timer which is pretty much useless since I never really need the hot water at the same time everyday and whenever there are power outages, the timer stops and it needs to be reset. My water heater being in the garage, I usually have to move several things out of the way to access the pump and having the timer set for several hours to make sure you cover the time range at which you usually take showers is a waste of power (personally I had it ran for 2 to 3 hours in the morning and also in the evening). To alleviate this problem, I plugged the pump in a cheap WiFi connected plug (doesn't really matter what brand you use as long as you don't mind adding another app on your phone for the initial setup), I set the pump on the constant ON mode, then I purchased a couple of Echo buttons available for $20 on desertcart, created a routine in my Alexa app to turn ON the pump (via the connected plug), wait 10 min and then turn it OFF. Lastly, I setup the echo buttons to trigger the routine when I press on either one of the buttons, placed one in the bathroom and one in the kitchen, et voilà! Each time I really need the hot water, I press on one of the buttons, get my water almost instantly and I don't have to worry about power consumption knowing that 10 min later the pump will be OFF. Getting instant hot water when you need it and saving water and power at the same time! I highly recommend this product to anyone having to wait a few minutes to get hot water in the right places.

## Features

- REPLACEMENT SENSOR VALVE KIT: Designed for use on branched hot water lines coming from the water heater or at the furthest point in the home, the Watts Premier Replacement Sensor Valve Kit ensures that hot water gets to all areas of the home. It is exclusively compatible with Watts Hot Water Recirculation Systems, models 500800, 500805 and HWRS-WH. It is not designed to be used with a dedicated return line to the water heater.
- INTEGRAL COMPONENT: The sensor valve is an integral part of the hot water recirculating system; it opens when the water on the hot water side cools, pushes the cool water back to the water heater, and closes when the hot water line hits 98 degrees F, reducing wait time for hot water.
- SIMPLE DESIGN: Equipped with two 12" supply lines, two reducing fittings from 1/2" FTP to 3/8" MPT, and two mounting screws, this Sensor Valve Kit has a simple design that makes it easy to install and replace, requiring no additional components. It can also be installed parallel to existing sensor valves to increase the speed of water recirculation.
- INDOOR ONLY: Suitable for use with all types of pipes, this sensor valve is meant only for indoor use on standard tank water heaters in residential buildings; it is not compatible with tankless water haters or for outdoor applications.
- EVERY DROP COUNTS: Water. It's in our name and close to our hearts. Since 1874, Watts Water Technologies has been delivering innovative technologies that make the world's most precious resource safe and accessible. Everything we design is made to keep the Earth's most precious resource safer, cleaner, and more useful for our customers. Our family of brands offers one of the most varied product lines in the world, with world-class, water-related solutions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004Q04AWO |
| Best Sellers Rank | #21,099 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #71 in Water Pump Accessories |
| Brand | Watts Premier |
| Brand Name | Watts Premier |
| Connector Type | Threaded |
| Customer Reviews | 4.5 out of 5 stars 2,095 Reviews |
| Exterior Finish | Silver |
| Global Trade Identification Number | 00098268256987 |
| Included Components | sensor valve, fitting, hoses |
| Inlet Connection Size | 0.38 inches |
| Inlet Connection Type | National Pipe Tapered |
| Item Dimensions | 12 x 2 x 2 inches |
| Item Highlight | Includes Two 12" Supply Lines Two 1/2" Ftp to 3/8" Mpt Fittings Mounting Screws for Indoor Tank Heaters Only OEM |
| Item Type Name | For Watts Hot Water Recirculating Pump |
| Item Weight | 13.6 ounces |
| Item dimensions L x W x H | 12 x 2 x 2 inches |
| Manufacturer | Watts |
| Manufacturer Part Number | WP596816 |
| Manufacturer Warranty Description | Watts (the "Company") warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge |
| Material | Stainless Steel |
| Material Type | Stainless Steel |
| Model Number | WP596816 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 5 |
| Number of Ports | 2 |
| Outlet Connection Size | 0.5 inches |
| Outlet Connection Type | National Pipe Tapered |
| Set Name | Premier Sensor Valve Kit (5 Piece) |
| Size | Sensor Valve Kit |
| Specification Met | Meets Watts 500800 Hot Water Recirculating Pump system specifications |
| Thread Size | 0.5 inches, 0.375 inches |
| Thread Type | Threaded |
| UPC | 098268256987 |
| Unit Count | 1 Count |
| Valve Type | hot water supply line |

## Product Details

- **Brand:** Watts Premier
- **Exterior Finish:** Silver
- **Inlet Connection Size:** 0.38 inches
- **Inlet Connection Type:** National Pipe Tapered
- **Item dimensions L x W x H:** 12 x 2 x 2 inches
- **Material:** Stainless Steel
- **Number of Ports:** 2
- **Outlet Connection Size:** 0.5 inches
- **Outlet Connection Type:** National Pipe Tapered
- **Specification Met:** Meets Watts 500800 Hot Water Recirculating Pump system specifications

## Images

![Watts Premier Replacement Sensor Valve Kit for 500800, 500805, HWRS-WH Watts ... - Image 1](https://m.media-amazon.com/images/I/61c1HEGpibL.jpg)
![Watts Premier Replacement Sensor Valve Kit for 500800, 500805, HWRS-WH Watts ... - Image 2](https://m.media-amazon.com/images/I/619q05f8PaL.jpg)
![Watts Premier Replacement Sensor Valve Kit for 500800, 500805, HWRS-WH Watts ... - Image 3](https://m.media-amazon.com/images/I/718U7OSZAVL.jpg)
![Watts Premier Replacement Sensor Valve Kit for 500800, 500805, HWRS-WH Watts ... - Image 4](https://m.media-amazon.com/images/I/71bZg2v57mL.jpg)
![Watts Premier Replacement Sensor Valve Kit for 500800, 500805, HWRS-WH Watts ... - Image 5](https://m.media-amazon.com/images/I/61n8-W9PTzL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: So what this does is move the hot water through the pipes constantly, not just when you need it? Seems like an energy suck. Is it?**
A: If you run this all the time you will likely increase your water heating costs significantly as you are turning your pipes into a big radiant heater.  You can use the built in timer to only have it come on at set periods, but this will only work if you have a very fixed schedule.  I attacked this another way.  I plugged the unit into a TP-Link HS110 Smart plug that is Alexa controlled.  I can just say turn on hot water pump or turn off hot water pump when I want to control it.  But that was not good enough for me.  I found that if this pump ran for four minutes it would give me hot water at the distant shower that I wanted, so I did the following.  I wrote a routine to turn on the pump, wait four minutes and then turn it off.  While I can run this by voice, I bought the new Amazon Alexa Button, they are about $14 for a two pack.  The button is battery operated and communicates to another Alexa device.  Just before I take a shower I push the button and within four minutes the water will be hot without having to run water.

**Q: If the pump is on, and the water is hot, the sensor valve closes, right?  Isn't the pump trying to push water against a totally closed line?**
A: The pump just stirs water in the pump housing. It's not a positive displacement pump, so it has no problem doing that. But most of the time the control valve allows a trickle of hot water to flow, just enough to keep the faucet temperature at a constant 100°.

**Q: can i used without the sensor valve**
A: The control valve keeps the water temperature at the faucet at 100° by slowing the flow to a trickle. If you don't use the control valve, be prepared for the hot water to circulate at full speed and the temperature at the faucet to go up to whatever your water heater is set for.

**Q: Does this shut down the flow completely once temperature is reached or will it continue to trickle water into the cold water line?**
A: The valve allows a slow flow of water back through the cold water line, enough to maintain the temperature at the faucet at about 100°F. If you let the hot water run, the temperature at the faucet goes over 100°F, and the valve shuts off the back flow through the cold water line. After the faucet is shut off, the water in the valve will cool to below 100°F, and the valve will crack open and allow some flow to keep the water warm. The valve does not bang open and shut. It opens more or less, as needed to keep the water warm at the faucet. It doesn't depend on the temperature set at the water heater, except that if the water is very hot, obviously it takes less to keep the water warm at the faucet. The valve accomplishes this automatically.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Buy this for additional fixtures not a no-name brand!
*by E***C on December 11, 2025*

After purchasing the Watts hot water recirculating pump to deliver instant warm water to our master bathroom on the opposite side of our 1800 sqft home with a crawlspace in Georgia, I was instantly spoiled and looked into how I can have the same in our kitchen that was farther down our plumbing line path. After installing an aftermarket unit thinking that I can save 50$, I was instantly disappointed. The product was clearly subpar and did not deliver instant hot water. I immediately scheduled a refund from Amazon for this 30 dollar part, and ordered this OEM Watts bypass Sensor valve kit. Unless you are using an impact driver to install your fittings, I can't see how this would break. The fittings are sealed by a gasket and therefore only require a quarter turn past finger tight as per the manufacturer instruction. I ignored these instructions and turned about 3/8 of a turn and used a decent level of torque on "finger tight" and had no issue. This product compared to an aftermarket bypass valve was night and day. Instant hot water to the faucet, and despite the warm water in the cold water faucet (obvious hazard when installing a bypass valve) I am more than pleased. Don't waste your time installing a junk aftermarket brand. No leakage and even with the obstructions under my kitchen sink the level of difficulty of the install was intro level. Just make sure to turn off your water stops and tighten all your fittings before you turn them back on!

### ⭐⭐⭐⭐⭐ Works like a charm, easy to program with Echo button
*by G***Y on January 31, 2019*

I purchased the pump and one sensor valve years ago and it has and still works flawlessly, my only complaint had to do with the old fashion timer which is pretty much useless since I never really need the hot water at the same time everyday and whenever there are power outages, the timer stops and it needs to be reset. My water heater being in the garage, I usually have to move several things out of the way to access the pump and having the timer set for several hours to make sure you cover the time range at which you usually take showers is a waste of power (personally I had it ran for 2 to 3 hours in the morning and also in the evening). To alleviate this problem, I plugged the pump in a cheap WiFi connected plug (doesn't really matter what brand you use as long as you don't mind adding another app on your phone for the initial setup), I set the pump on the constant ON mode, then I purchased a couple of Echo buttons available for $20 on Amazon, created a routine in my Alexa app to turn ON the pump (via the connected plug), wait 10 min and then turn it OFF. Lastly, I setup the echo buttons to trigger the routine when I press on either one of the buttons, placed one in the bathroom and one in the kitchen, et voilà! Each time I really need the hot water, I press on one of the buttons, get my water almost instantly and I don't have to worry about power consumption knowing that 10 min later the pump will be OFF. Getting instant hot water when you need it and saving water and power at the same time! I highly recommend this product to anyone having to wait a few minutes to get hot water in the right places.

### ⭐⭐⭐⭐⭐ Not hard to install and you will receive hot water in about 15 seconds.
*by K***N on March 10, 2022*

So we installed the Watts Hot Water Recirculating Pump in our home and it came with one sensor valve kit which I installed at our kitchen sink which was furthest from the hot water heater. Unfortunately the kitchen is on the other side of the house so we discovered that there was a split in our water lines under the house and only one side of the house got immediate hot water. So we installed a second valve kit under the bathroom sink on the other side of the house and now we get hot water within 15 seconds at every sink tub or shower in the house. We used to have to run water up to 2 minutes previously before we got hot water. Can't go wrong installing this in your home if you have had similar problems.

## Frequently Bought Together

- Watts Premier Replacement Sensor Valve Kit for 500800, 500805, HWRS-WH Watts Instant Hot Water Recirculation System, Two 12" Supply Lines, Two Reduced Fittings 1/2" FTP - 3/8" MPT, Two Mounting Screws
- WP596816 Sensor Valve Kit Fit for watts premier 500800&500805 & grundfos up comfort Instant Hot Water Recirculating Pump System, Include Two 12" Supply Lines & Two 1/2" x 3/8" Reduced Fittings

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-10-27*