--- product_id: 79631804 title: "Watts Premier Replacement Sensor Valve for 500800 and 500805 Watts Instant Hot Water Recirculating Pump System, 4.5\" Sensor Valve, Two 12\" Supply Lines with Adapter Fittings, 1/2\" Threaded Connectors" brand: "watts premier" price: "€ 125.77" currency: EUR in_stock: true reviews_count: 13 category: "Watts Premier" url: https://www.desertcart.gr/products/79631804-watts-premier-replacement-sensor-valve-for-500800-and-500805-watts store_origin: GR region: Greece --- # Eco-Friendly Design 4.5" Sensor Valve Easy Installation Watts Premier Replacement Sensor Valve for 500800 and 500805 Watts Instant Hot Water Recirculating Pump System, 4.5" Sensor Valve, Two 12" Supply Lines with Adapter Fittings, 1/2" Threaded Connectors **Brand:** watts premier **Price:** € 125.77 **Availability:** ✅ In Stock ## Summary > 💦 Never Wait for Hot Water Again! ## Quick Answers - **What is this?** Watts Premier Replacement Sensor Valve for 500800 and 500805 Watts Instant Hot Water Recirculating Pump System, 4.5" Sensor Valve, Two 12" Supply Lines with Adapter Fittings, 1/2" Threaded Connectors by watts premier - **How much does it cost?** € 125.77 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/79631804-watts-premier-replacement-sensor-valve-for-500800-and-500805-watts) ## 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 - • **💡 Trusted Brand:** Backed by Watts Water Technologies, a leader in innovative water solutions since 1874. - • **🏠 Indoor Use Only:** Perfectly designed for residential tank water heaters, ensuring optimal performance indoors. - • **🔄 Instant Hot Water:** Say goodbye to waiting! This valve ensures hot water is always at your fingertips. - • **🛠️ Hassle-Free Setup:** Comes with two 12" supply lines and adapter fittings for a seamless installation experience. - • **🌡️ Smart Temperature Control:** Automatically opens and closes based on water temperature, enhancing efficiency. ## Overview The Watts Premier Replacement Sensor Valve is a crucial component for your hot water recirculating system, designed to enhance efficiency and reduce wait times for hot water. Compatible exclusively with Watts 500800 and 500805 models, this 4.5" valve features a simple installation process with included supply lines, making it an essential upgrade for any residential tank water heater. ## Description Designed for use on branched hot water lines coming from the water heater, the Watts Premier Replacement Sensor Valve can serve as a replacement valve or for adding an additional valve where it's needed. It is exclusively compatible with the Watts Premier 500800 or 500805 Hot Water Recirculating Pump models. Please note that this valve is not intended for use with dedicated return lines 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 includes two 12" supply lines with adapter fittings, making the installation and maintenance process straightforward and hassle-free. The simple design of the replacement sensor valve ensures that it can be easily installed without the need for additional components or specialized tools. For best results, avoid using thread sealant tape or pipe dope on the sensor valve threads during installation.The Watts Premier Replacement Sensor Valve 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: Wished I had replaced this valve sooner! - Works great. Wish I had replaced the other one sooner. The first one came with the instant hot water pump. This brings warm water to our upstairs bathroom in no time, saving us a lot of wasted water and the money to pay for that water. Review: Simple replacement - I’ve had my Watts hot water circulation system for about 3 years. For the last few months it has not been working as well and noticed it was taking longer for hot water to arrive. Thought it might be the colder winter we had. Not that. Pump was running normally so I assumed the transfer valve was the culprit. Ordered and replaced and it solved the problem. Not too excited that the simple valve failed in less that 3 years. Hopefully this one will last longer. ## Features - REPLACEMENT SENSOR VALVE: Designed for use on branched hot water lines coming from the water heater, the Watts Premier Replacement Sensor Valve can serve as a replacement valve or where an additional valve is needed. - 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 F. - SIMPLE DESIGN: Equipped with two 12" supply lines with adapter fittings, this replacement sensor valve has a simple design that makes it easy to install and replace, requiring no additional components. - 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07G956FCR | | Best Sellers Rank | #146,162 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #181 in Water Pump Accessories | | Brand | Watts Premier | | Brand Name | Watts Premier | | Capacity | 5 Liters | | Color | 4.5 Inch Sensor Valve | | Container Type | Valve | | Customer Reviews | 4.0 out of 5 stars 885 Reviews | | Finish Type | Brushed | | Global Trade Identification Number | 00099351367108 | | Included Components | Sensor Valve | | Item Dimensions L x W x H | 4.5"L x 2"W x 1"H | | Item Type Name | for Instant Hot Water Recirculating Pump System | | Manufacturer | Watts | | Material | Stainless Steel | | Model Name | Replacement Sensor Valve | | Model Number | 367010 | | Other Special Features of the Product | Manual | | Package Information | Valve | | Part Number | WP367010 | | Special Feature | Manual | | UPC | 099351367108 | | Unit Count | 1.0 Count | | Voltage | 110 | ## Images ![Watts Premier Replacement Sensor Valve for 500800 and 500805 Watts Instant Hot Water Recirculating Pump System, 4.5" Sensor Valve, Two 12" Supply Lines with Adapter Fittings, 1/2" Threaded Connectors - Image 1](https://m.media-amazon.com/images/I/41s9GtN9cUL.jpg) ![Watts Premier Replacement Sensor Valve for 500800 and 500805 Watts Instant Hot Water Recirculating Pump System, 4.5" Sensor Valve, Two 12" Supply Lines with Adapter Fittings, 1/2" Threaded Connectors - Image 2](https://m.media-amazon.com/images/I/616M9XCd8rL.jpg) ![Watts Premier Replacement Sensor Valve for 500800 and 500805 Watts Instant Hot Water Recirculating Pump System, 4.5" Sensor Valve, Two 12" Supply Lines with Adapter Fittings, 1/2" Threaded Connectors - Image 3](https://m.media-amazon.com/images/I/61USgMrXKQL.jpg) ![Watts Premier Replacement Sensor Valve for 500800 and 500805 Watts Instant Hot Water Recirculating Pump System, 4.5" Sensor Valve, Two 12" Supply Lines with Adapter Fittings, 1/2" Threaded Connectors - Image 4](https://m.media-amazon.com/images/I/61SMVEZx3vL.jpg) ## 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 ### ⭐⭐⭐⭐⭐ Wished I had replaced this valve sooner! *by S***R on October 30, 2025* Works great. Wish I had replaced the other one sooner. The first one came with the instant hot water pump. This brings warm water to our upstairs bathroom in no time, saving us a lot of wasted water and the money to pay for that water. ### ⭐⭐⭐⭐⭐ Simple replacement *by C***M on April 2, 2022* I’ve had my Watts hot water circulation system for about 3 years. For the last few months it has not been working as well and noticed it was taking longer for hot water to arrive. Thought it might be the colder winter we had. Not that. Pump was running normally so I assumed the transfer valve was the culprit. Ordered and replaced and it solved the problem. Not too excited that the simple valve failed in less that 3 years. Hopefully this one will last longer. ### ⭐ Internal springs no longer stainless steel - major failure *by K***Z on February 7, 2025* I purchased this as a replacement for one that failed (5 years old). The replacement failed within 3 months. I disassembled the original unit and discovered the cause of failure was calcium buildup, I cleaned and reassembled it for use as a spare. This allowed me the knowledge of how the unit is assembled and what components are used. Upon removal of the replacement valve, I was shocked. The failure was cause by the internal springs made of steel, which rusted and clogged up the internal works of the valve. My original valve used stainless steel springs and is now back in service, working perfectly. I will attempt to contact the manufacturer for this issue. ## Frequently Bought Together - Watts Premier WP367010 Sensor Valve Hot Water Recirculating Pump (0955800), Plain - Water Line Adapter, 4 PCS Pipe Fittings in 1/2" Female to 3/8" Male Reducer Adapter, Compression Fitting for Kitchen Bathroom Faucet Supply Hose, Stop Valve Pipe Connector With Rubber Washer --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/79631804-watts-premier-replacement-sensor-valve-for-500800-and-500805-watts](https://www.desertcart.gr/products/79631804-watts-premier-replacement-sensor-valve-for-500800-and-500805-watts) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-05-30*