---
product_id: 2505843
title: "GRU-595916 Recirculating Hot Water Pump Comfort System 25 Watts, Easy Install. Instant hot water throughout system. Entire Kit Included"
brand: "grundfos"
price: "€ 759.48"
currency: EUR
in_stock: true
reviews_count: 8
category: "Grundfos"
url: https://www.desertcart.hr/products/2505843-gru-595916-recirculating-hot-water-pump-comfort-system-25-watts
store_origin: HR
region: Croatia
---

# 25W ultra-efficient power Up to 9 GPM flow rate Whisper-quiet operation GRU-595916 Recirculating Hot Water Pump Comfort System 25 Watts, Easy Install. Instant hot water throughout system. Entire Kit Included

**Brand:** grundfos
**Price:** € 759.48
**Availability:** ✅ In Stock

## Summary

> 🔥 Never wait for hot water again — comfort meets efficiency!

## Quick Answers

- **What is this?** GRU-595916 Recirculating Hot Water Pump Comfort System 25 Watts, Easy Install. Instant hot water throughout system. Entire Kit Included by grundfos
- **How much does it cost?** € 759.48 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/2505843-gru-595916-recirculating-hot-water-pump-comfort-system-25-watts)

## 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

- • **Smart Water Savings:** Uses existing cold water line to recycle hot water efficiently
- • **Energy-Savvy Comfort:** Low 25W power consumption with programmable timer
- • **Effortless Installation:** Plug-and-play kit with 10-foot cord & no extra wiring
- • **Instant Hot Water, Zero Wait:** Eliminate cold water delays with smart recirculation
- • **Durable Stainless Steel Build:** Corrosion-resistant bronze & stainless steel for long life

## Overview

The Grundfos GRU-595916 is a maintenance-free, energy-efficient 25-watt recirculating hot water pump designed for instant hot water delivery. Featuring a durable stainless steel and bronze construction, it offers a flow rate up to 9 gallons per minute and quiet operation. The complete kit includes a timer and a 10-foot power cord for easy installation, using existing plumbing to save water and energy while enhancing home comfort.

## Description

Product Description Up1510su7ptlc features: -Recirculator pump kit.-Material: Bronze and stainless steel.-Aluminum stator housing.-Stainless steel spherical separator.-Stainless steel / tungsten carbide rotor.-Stainless steel, epdm, pu, ptfe, graphite rotor and impeller.-Brass ms 58 pump housing.-Ppo isolation valve.-Pa66/6 terminal box cover, motor cover.-Lexan light.-Pvc cable, cable relief.-Epp 55 insulating cover.-Epdm o'rings.-Pom check valve.-Proud to bring the comfort and savings of hot water recirculation to the existing homes market with the comfort series instant hot water system.-Stainless steel circulator, complete with timer and 10-foot power cord, is installed directly to the hot water discharge on the water heater.-Comfort valve is installed under the sink at the fixture furthest from the water heater, and the system uses the existing cold water line to return hot water to the water heater.-Circulator pumps, series up, are specifically designed for heating systems.-Suitable for circulation of hot domestic water and for circulation of liquid in cooling and air-conditioning systems.-Wet rotor design.-Composite impeller.-Eliminates and prevents corrosive effects of fresh water.-Maintenance-free, low energy consumption, easy to install, quiet running.-Improved performance and efficiency.-Pre-program usage times to save power.-No additional wiring required.-Adds to savings by operating pump by sensing the water temperature.-Insulation class: F.-Flow range: 0 - 65 us gpm.-Head range: 0'' - 72''.-Maximum fluid temperature: 150 f (66 c).-Minimum fluid temperature: 36 f (2 c).-Maximum working pressure: 145 psi.-Connection: 075'' m x 075'' fnpt.-Tlc : Timer, line cord. Includes: -Includes timer and line cord.-Comfort system includes a up15-10su7/tlc circulator and the revolutionary comfort valve. Specifications: -Up15-10su7p/tlc comfort series 1/25 hp recirculator.-Recirculator engine: 1/25 hp.-Power consumption: 25watts.-Motors: Voltage: 115volts, phase: 1. Dimensions: -Dimension. From the Manufacturer The Grundfos UP15-10SU7P/TLC Comfort Series 1/25 HP Recirculator Pump is a Comfort Series Instant Hot Water System. Includes timer and line cord. Grundfos Pumps is proud to bring the comfort and savings of hot water recirculation to the existing homes market with the Comfort Series Instant Hot Water System. The Comfort System includes a Grundfos UP15-10SU7/TLC circulator and the revolutionary Comfort Valve. The stainless steel circulator, complete with timer and 10-foot power cord, is installed directly to the hot water discharge on the water heater. The Comfort Valve is installed under the sink at the fixture furthest from the water heater, and the system uses the existing cold water line to return hot water to the water heater. The Grundfos circulator pumps, Series UP, are specifically designed for heating systems. The pumps are also suitable for circulation of hot domestic water and for circulation of liquid in cooling and air-conditioning systems.

Review: Grundfos Recirculating Hot Water System Does the Job! - I have a rambling 1885 Victorian house in New York City, with long domestic hot water branches, requiring long wait times for hot water to arrive, not good! My first plan was to install two dedicated DHW return lines, requiring installing 1/2" pex lines connecting to the kitchen on ground floor, and to the third floor bath. This traditional solution means the DHW is being circulated in a loop, making hot water always available at the tap. Great system, but a lot of work! This Grundfos UP pump was a good solution for me. It meant that I could avoid all the work involved in putting in two dedicated "loop" DHW return lines - because it uses the existing cold water supply line as the "loop" to push hot water and make it available when you open the tap - BOOM! I was skeptical that it would actually work, but after installing the system I can report that it works very well! I find that when you open the tap the water is not "fully" hot, but it is warm enough for washing your hands, and the most important thing, you are not waiting for the cold water to become warm and/or hot. After ten seconds or so, the water is measurably hot, certainly hot enough for washing dishes or doing the things you normally do with your hot water! The installation was a snap, I would recommend that you install gate valves above and below where you mount the pump coming out of your HW heater, that will make it easy in future if you need to change the pump or get it serviced. On the comfort valve part that is mounted under your sink, just use stainless steel hoses *(the pump kit comes with 2) which have rubber cone shaped washers so that you just have to tighten them down to the valve, without using any pipe dope or teflon tape on the threads. We'll see how long these valves last in daily use, I'll report back if there's any issues. Overall a good product and innovative technology designed to save energy and water!
Review: No More Hot Water Waits! - Easy to install (if you're handy) and works like a charm. It's been in for about a week. I've set it up to run continuously in the mornings during shower times and in the evening during clean up and bath times. In the middle of the day I have set it to go on and off every 15 minutes since I am home and working all day and still use the kitchen periodically. The 15 on/15 off setting works great! Our kitchen is at one end of a long ranch house and the water heater is at the other (under all the bedrooms and bathrooms). It used to take 2 and a half minutes (on average) to get hot water to the kitchen. No it's at the very least really warm when it starts (in the middle of the day) and heats up quickly...or actually hot (during those times it's set for a constant setting). I did have to get used to having warm water come out of the cold tap. But it clears out in a matter of seconds. Not an issue at all. I would definitely recommend this to anyone having issues with long waits for hot water. We also had one at our old house. It was a different brand (I can't remember which, I think we bought it at Sam's Club), it worked, but it was pretty weak and kind of noisy. The Grundfos is a quality, solidly built product. The motor is so quiet you can barely hear it hum when it's running. And it definitely has the chops to get the job done...and done well. I can't say enough good about it.

## Features

- TLC = Timer, Line Cord, 6-Foot
- Flow range: 0 - 9 U.S. GPM, Head range: 0 - 6-Foot
- Motors: Single phase, 115V. Supply Voltage:115-120 VAC, 60 hertz, Contact Rating: 16 amps
- Connection: 3/4-Inch M by 3/4-Inch FNPT.Maintenance-free, low energy consumption, easy to install, quiet running
- The Grundfos circulator pumps, Series UP, are specifically designed for heating systems. The pumps are also suitable for circulation of hot domestic water and for circulation of liquid in cooling and air-conditioning systems

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Grundfos |
| Color | Black |
| Material | Bronze , Stainless Steel |
| Power Source | Corded Electric |
| Product Dimensions | 10"L x 10"W x 10"H |
| Style | Circulator |

## Product Details

- **Brand:** Grundfos
- **Color:** Black
- **Manufacturer:** Grundfos
- **Material:** Bronze, Stainless Steel
- **Maximum Flow Rate:** 9 Gallons Per Minute
- **Maximum Lifting Height:** 6 Feet
- **Power Source:** Corded Electric
- **Product Dimensions:** 10"L x 10"W x 10"H
- **Style:** Circulator
- **Voltage:** 115 Volts

## Images

![GRU-595916 Recirculating Hot Water Pump Comfort System 25 Watts, Easy Install. Instant hot water throughout system. Entire Kit Included - Image 1](https://m.media-amazon.com/images/I/61nMVyAaqkL.jpg)

## Available Options

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

## Questions & Answers

**Q: Trying to understand the following: how valve communicates with pump? My understanding, valve has temperature sensor, valve opens when temperature in hot line drops below a whatever temperature set in there(like 85F or so). So, if pump set to ON - it will start circulating right away... But if pump set for certain time…**
A: Several of these answers are incorrect.The thermostat is not built in to the pump...if there was a thermostat in the pump, it would run and turn off almost immediately because the water is being pumped out of the tank and would satisfy the set temperature very quickly or not turn on at all because the pump is connected directly to the tank outlet. The PM Comfort Auto has a temperature sensor that attaches to the cold line to the HW heater...the comfort system runs all the time...against itself when the comfort valve is not open.It does not have a thermsistor...it is a mixing valve. When the temperature of the water approaches 95 degrees, the valve closes just like a thermostat in a car does.The amount that of hot water that returns is not "miniscule"...it is the same amount as you would use to wait for the hot water except that the pump only provides 2-3 gallon per minute...as it approaches 95 degrees the valve starts to close and the flow reduces. As the system continues to run after the initial start, then it is correct that it a small amount that goes back to the tank.

**Q: You mount the pump at the hot water heater, what type of valve is at the farthest point to allow water circulation? I have slab construction. Thanks**
A: Your kit should have come with the bypass valve.  This is mounted under any sink between the hot and cold water pipes. Best location is at the farthest point from the hot water tank. I actually have 3 of these bypass valves installed because of the way the hot water is distributed throughout the house. You should have a flex pipe between the cutoff valve and the faucet for both the hot and cold. These flex pipes feed the bypass valve and you will then need two more flex pipes to go from the valve to the faucets. If your kit did not come with the bypass valve and pipes,  you can order them online.  The valve is referred to as a comfort valve, also from Grundfos.   This system works great.  I have the timer set to come on about an hour before I get up and run for 3 hours in the morning and 3 hours in the evening.

**Q: If I leave the system 'ON' at all times (and don't utilize the timer), what's the energy usage equivalent?**
A: If you leave it on, all the time you are basically putting a radiant heating system into the areas where your hot water runs...  It made out hot water heater bill insane.  Turned it off, and my hot water heater uses a 3rd or less of what it used to.  The timer needs to be coordinated with when you need hot water at the most distant fixture.  I am adding a remote wireless control to mine so I can only turn it in when I need it and don't have to use the timer.

**Q: Is ithere any advantage to useing more than 1 valve in the system?**
A: if you want instant hot water you need a valve at every sink. Our house has about a 60' run. I only installed 1 valve at the farthest point. The other sinks before it get hot pretty quick now but not as fast as the valved one.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Grundfos Recirculating Hot Water System Does the Job!
*by 1***S on February 28, 2017*

I have a rambling 1885 Victorian house in New York City, with long domestic hot water branches, requiring long wait times for hot water to arrive, not good! My first plan was to install two dedicated DHW return lines, requiring installing 1/2" pex lines connecting to the kitchen on ground floor, and to the third floor bath. This traditional solution means the DHW is being circulated in a loop, making hot water always available at the tap. Great system, but a lot of work! This Grundfos UP pump was a good solution for me. It meant that I could avoid all the work involved in putting in two dedicated "loop" DHW return lines - because it uses the existing cold water supply line as the "loop" to push hot water and make it available when you open the tap - BOOM! I was skeptical that it would actually work, but after installing the system I can report that it works very well! I find that when you open the tap the water is not "fully" hot, but it is warm enough for washing your hands, and the most important thing, you are not waiting for the cold water to become warm and/or hot. After ten seconds or so, the water is measurably hot, certainly hot enough for washing dishes or doing the things you normally do with your hot water! The installation was a snap, I would recommend that you install gate valves above and below where you mount the pump coming out of your HW heater, that will make it easy in future if you need to change the pump or get it serviced. On the comfort valve part that is mounted under your sink, just use stainless steel hoses *(the pump kit comes with 2) which have rubber cone shaped washers so that you just have to tighten them down to the valve, without using any pipe dope or teflon tape on the threads. We'll see how long these valves last in daily use, I'll report back if there's any issues. Overall a good product and innovative technology designed to save energy and water!

### ⭐⭐⭐⭐⭐ No More Hot Water Waits!
*by K***. on November 10, 2014*

Easy to install (if you're handy) and works like a charm. It's been in for about a week. I've set it up to run continuously in the mornings during shower times and in the evening during clean up and bath times. In the middle of the day I have set it to go on and off every 15 minutes since I am home and working all day and still use the kitchen periodically. The 15 on/15 off setting works great! Our kitchen is at one end of a long ranch house and the water heater is at the other (under all the bedrooms and bathrooms). It used to take 2 and a half minutes (on average) to get hot water to the kitchen. No it's at the very least really warm when it starts (in the middle of the day) and heats up quickly...or actually hot (during those times it's set for a constant setting). I did have to get used to having warm water come out of the cold tap. But it clears out in a matter of seconds. Not an issue at all. I would definitely recommend this to anyone having issues with long waits for hot water. We also had one at our old house. It was a different brand (I can't remember which, I think we bought it at Sam's Club), it worked, but it was pretty weak and kind of noisy. The Grundfos is a quality, solidly built product. The motor is so quiet you can barely hear it hum when it's running. And it definitely has the chops to get the job done...and done well. I can't say enough good about it.

### ⭐⭐⭐⭐⭐ Hot water when you want it
*by L***8 on December 13, 2025*

I purchased this unit and I had it installed today by a plumbing company, I read some of the reviews prior to ordering it and decided to have it installed. It works perfectly, HOT water is at the furthest faucet in 5 to 10 second and other faucets along the way have it much faster than before. I will probably install a second valve under the kitchen sink. I heard complaints of it being very loud, I can barely hear it running and it's also in the garage

## Frequently Bought Together

- Grundfos GRU-595916 Recirculating Hot Water Pump Comfort System 25 Watts, Easy Install. Instant hot water throughout system. Entire Kit Included
- Grundfos 595926 Valve, Black

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-08*