--- product_id: 272805850 title: "595656 Aquastat Control, Black" brand: "grundfos" price: "€ 81.97" currency: EUR in_stock: true reviews_count: 5 category: "Grundfos" url: https://www.desertcart.ie/products/272805850-595656-aquastat-control-black store_origin: IE region: Ireland --- # 1-inch clip-on pipe mount Compatible with timer control 105-115°F precise temp range 595656 Aquastat Control, Black **Brand:** grundfos **Price:** € 81.97 **Availability:** ✅ In Stock ## Summary > 🌡️ Keep your hot water smart, safe, and energy-savvy with Grundfos Aquastat! ## Quick Answers - **What is this?** 595656 Aquastat Control, Black by grundfos - **How much does it cost?** € 81.97 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/272805850-595656-aquastat-control-black) ## Best For - grundfos enthusiasts ## Why This Product - Trusted grundfos brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety-First Hot Water:** Prevents scalding by maintaining water temperature between 105-115°F, balancing comfort and safety. - • **Energy & Pump Life Saver:** Runs pump only when water temp drops below 105°F, reducing wear and energy use. - • **Easy Clip-On Installation:** 1-inch pipe mount design for quick, hassle-free setup without complex tools. - • **Smart Temperature Control:** Automatically stops pump above 115°F to prevent overheating and damage. - • **Seamless Timer Integration:** Works perfectly with timer controls for optimized hot water circulation schedules. ## Overview The Grundfos 595656 Aquastat Control is a clip-on thermostat designed for 1-inch pipes that automatically regulates hot water recirculation pumps by switching them off above 115°F and back on below 105°F. Compatible with timer controls, it optimizes energy use, extends pump life, and enhances user safety by preventing excessively hot water circulation. ## Description Grundfos 3/4-Inch Clip-on Aquastat Control 595656 automatically turns the circulator off when the temperature in the hot water line exceeds 115 Degrees F. and back on when the temperature falls below 105 Degrees. May be used alone or with timer control. Review: This is the information I could NOT find anywhere else. It is very simple I hope this save someone some time figuring it out. - Although maybe this is obvious, it was not to me, so I thought I would explain to make it clearer. For this exercise let's assume your hot water heater is set to 140 degrees. If your hot water recirculation line has a Grundfos pump and NO thermostat (timer or no timer), your pump will run 100% of the time it is set to be on. It will be circulating 140 degree water through your recirculation line. When your hot water is turned on it will be instantly 140 degrees. The Benefit: Instant 140 degree hot water. The Negative: Wear and tear on your pump & pipes. Danger of users scorching themselves with instant 140 degree water. If your hot water recirculation line has a Grundfos pump and this thermostat (timer or no timer), your pump will run a fraction of the time of the time it is set to be on (only when the water temp is between 105 -110 degrees) . It will be circulating 105 - 110 degree water through your recirculation line. When your hot water is turned on it will be somewhere between 105 -110 and will quickly heat up to 140. The Benefit: This will SAVE wear and tear on your pump & pipes. Users of hot water are less like likely to get scorched by water that is too hot. ENERGY (electricity to run the pump and electricity/gas to heat the water). The Negative: Only that your water will not be instantly 140 degrees. This thermostat is set PERMANENTLY at 105 - 110 degrees and cannot be changed. There is another version of this thermostat that is set PERMANENTLY at 85 - 105 degrees. I tried this version first and although it does save more energy and the pump almost never ran, the water was NOT hot enough for me. The 105 - 110 model is the perfect temperature for me. Review: perfect - perfect ## Features - Aquastat kit - 1-Inch - Mounts on pipe - May be used with timer - 105 - 115 degrees F ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Grundfos | | Part number | 595656 | | Item Weight | 0.28 g | | Product Dimensions | 10.16 x 1.27 x 1.27 cm; 0.28 g | | Item model number | 595656 | | Color | Black | | Item Package Quantity | 1 | | Batteries Included? | No | | Batteries Required? | No | ## Images ![595656 Aquastat Control, Black - Image 1](https://m.media-amazon.com/images/I/51vGH7Opo8L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ This is the information I could NOT find anywhere else. It is very simple I hope this save someone some time figuring it out. *by M***. on 30 June 2016* Although maybe this is obvious, it was not to me, so I thought I would explain to make it clearer. For this exercise let's assume your hot water heater is set to 140 degrees. If your hot water recirculation line has a Grundfos pump and NO thermostat (timer or no timer), your pump will run 100% of the time it is set to be on. It will be circulating 140 degree water through your recirculation line. When your hot water is turned on it will be instantly 140 degrees. The Benefit: Instant 140 degree hot water. The Negative: Wear and tear on your pump & pipes. Danger of users scorching themselves with instant 140 degree water. If your hot water recirculation line has a Grundfos pump and this thermostat (timer or no timer), your pump will run a fraction of the time of the time it is set to be on (only when the water temp is between 105 -110 degrees) . It will be circulating 105 - 110 degree water through your recirculation line. When your hot water is turned on it will be somewhere between 105 -110 and will quickly heat up to 140. The Benefit: This will SAVE wear and tear on your pump & pipes. Users of hot water are less like likely to get scorched by water that is too hot. ENERGY (electricity to run the pump and electricity/gas to heat the water). The Negative: Only that your water will not be instantly 140 degrees. This thermostat is set PERMANENTLY at 105 - 110 degrees and cannot be changed. There is another version of this thermostat that is set PERMANENTLY at 85 - 105 degrees. I tried this version first and although it does save more energy and the pump almost never ran, the water was NOT hot enough for me. The 105 - 110 model is the perfect temperature for me. ### ⭐⭐⭐⭐⭐ perfect *by J***N on 18 October 2018* perfect ### ⭐⭐⭐⭐⭐ Five Stars *by A***N on 26 February 2018* good value thanks ## Frequently Bought Together - Grundfos 595656 Aquastat Control, Black - Grundfos UP15-18B5 (59896114) Pump, 1/2" Sweat End Open System Circulator, 1/25 HP 115V - Bronze - Grundfos 599388 --- ## 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.ie/products/272805850-595656-aquastat-control-black](https://www.desertcart.ie/products/272805850-595656-aquastat-control-black) --- *Product available on Desertcart Ireland* *Store origin: IE* *Last updated: 2026-10-15*