The 6 Best Hot Water Recirculating Pumps for 2025
- Published onDecember 19, 2024
- Product Reviews, Resources
This guide explains everything you need to know about hot water recirculating pumps—how they work, what to look for, and the best hot water recirculating pumps for residential homes.
Waiting for hot water to reach your sink or shower, especially during a busy morning or when trying to tackle the dishes, can be extremely frustrating.
Those extra seconds (or minutes) can feel like an eternity while gallons of water are wasted, swirling uselessly down the drain.
If you experience this daily, a hot water recirculating pump might just be the solution you need. These pumps introduce convenience into your life by providing hot water when you use it the most.
Below, I’ll cover how recirculating pumps work, the different types you can use in your home, and the best recirculating pumps on the market today.
How Does a Hot Water Recirculating Pump Work?
A hot water recirculation pump moves hot water through a plumbing system from the water heater to the furthest fixture in a home (like the farthest sink or shower), giving you access to hot water within seconds of opening up a faucet.
Once the hot water reaches the last fixture, it travels back to the water heater either through a dedicated return line or through the cold water pipe, creating a loop. These are known as closed and open loop systems.
Closed Loop Systems
In a closed loop system, hot water moves through the plumbing system as it normally would, but instead of the hot water line stopping at the last fixture, it continues through a dedicated return line back to the water heater.
Once this water reaches the water heater, it’s either added to the hot water already in the tank or tied into the cold water supply line right before it enters back into the water heater.
If you’re replacing a recirculating pump or your home previously had one installed, chances are you probably already have a dedicated return line you can use.
However, adding a dedicated return line to an existing plumbing system can be very expensive and in some cases, require some pretty serious plumbing renovations, especially if the furthest fixture is on the top floor of your home.
Open Loop Systems
An open loop system is when a crossover valve is used to combine the hot and cold lines underneath the furthest sink. When the recirculating pump is on, hot water is pushed through this valve, allowing it to enter and return to the water heater using the cold water line.
Using a crossover valve is the best option for retrofitting homes that don’t already have a dedicated return line installed.
You can install it under whichever sink you need to (doesn’t matter which floor it’s on) and you don’t need to install any additional water lines for it to work.
However, there is a trade-off. Since the hot water travels back to the water heater using the cold water line, you might feel warm water coming out of the cold side for a few seconds.
This can happen while the recirculating pump is running or in between recirculation cycles.
Are Recirculating Pumps Worth It?
Recirculating pumps are a convenient addition to any home, but whether they are “worth it” or not depends on your priorities and circumstances.
Without a pump, hot water just sits in your pipes after you’re done using it. As it sits, the hot water starts to slowly cool off until a tap is turned on again.
That means you’re stuck waiting as the now cooler water has to be pushed out of the line before the hot water produced from your water heater can reach you.
On the plus side, recirculating pumps can save you from wasting all this water, which is both environmentally friendly and can potentially lower your water bill.
To help you get a better idea on how much money you’re spending wasting water, you can use our calculator below.
Water Savings Calculator
Fixtures
Select the type of fixture, how long you normally wait for hot water to reach the fixture (in seconds), and how many times you use the fixture daily. For example, if four people in your home take showers each day, you should add a showerhead, the wait time, and 4 daily uses.
| Fixture | Wait Time (seconds) | Daily Uses | Remove |
|---|---|---|---|
Local Water Utility Pricing (per CCF)
Specify the number of pricing tiers set by your local water utility and then add the rates for each one. The last tier will automatically cover any usage above the highest range. If unsure, check your latest water bill for these details.
| From (CCF) | To (CCF) | Rate ($/CCF) | Remove |
|---|
Now that you have an idea of how much water a recirculating pump can save, it’s time to see how that stacks up against the cost of running one.
While recirculating pumps save water, they do use electricity. How much they’ll impact your electric bill depends on the pump’s wattage, how many hours it runs each day, and your local electricity rates.
To help you figure this out, you can use the calculator below.
Recirculating Pump Annual Cost Calculation
Use this calculator to estimate the daily and annual cost of running a recirculating pump. Find a pump you like and then enter its wattage, how many hours you plan to run it daily, and your local electricity rate.
Once you’ve calculated your water savings and a pump’s operating cost, you can compare them to get a better sense of whether a recirculating pump is worth it for your home and budget.
Note: You should also consider the cost of the pump and any installation costs associated with getting it up and running. If you’re upgrading your entire water heating system and thinking about buying a tankless water heater, most brands will have a specific model that comes with a recirculating pump built-in.
How to Choose a Recirculating Pump
Choosing the right hot water recirculating pump will save you time, water, and energy.
To pick the best one for your home, you’ll need to think about your plumbing setup, how far the hot water needs to be circulated, and the features you want.
Here’s a simple guide to help you:
Dedicated Return Line or Crossover Valve System
We’ve already covered the difference between these two systems but make sure you know what type of setup the pump uses before you buy it.
You don’t want to buy one and then realize it only works with dedicated return lines after you order it. Each pump should tell you what type of system they work with.
Flow Rate and Head Pressure
Flow Rate
This tells how much water the pump can move, usually measured in gallons per minute (GPM). It’s important because it affects how quickly hot water can circulate through your plumbing system.
For small homes with short plumbing lines, you don’t need a pump with a high flow rate. A pump that moves 3 to 6 GPM is usually enough to get hot water to your faucets without wasting energy or creating too much pressure.
For larger homes with longer pipes, you’ll want a pump with a higher flow rate, around 8 to 15 GPM. These pumps can move water faster and are better at keeping it hot as it travels farther through your plumbing system.
The key is to match the pump’s flow rate to the size of your home. Smaller homes require less powerful pumps, whereas a larger home would require a pump that can move more water so all the fixtures can be reached.
Choosing the best hot water recirculating pump for your specific home gives you consistent hot water when you want it while only using the necessary amount of energy to do so.
Head Pressure
This measurement, given in feet, shows how high the pump can lift water. In a closed-loop recirculation system, the head mainly reflects pressure loss due to friction from pipes and fittings, not changes in height.
While head pressure is an important feature of a pump, you typically don’t need to calculate it precisely for most home setups. Many residential systems work well with pumps that have lower head pressures, usually between 1 to 10 feet.
Power Consumption
How much power a pump uses impacts both your energy bills and how efficiently it operates. For instance, pumps that use less than 10 watts are very efficient, but they might take longer to fully recirculate hot water through your system.
These low-powered pumps work great if you set them to run on a schedule throughout the day. However, they might not be the best choice for on-demand use, as hot water can take longer to reach your fixtures.
On the other hand, a higher-powered pump between 50 to 100 watts can circulate water faster but it will consume more energy.
When choosing a pump, think about how much power you’re willing to trade for performance.
Material and Build Quality
The material of a pump plays a big role in its durability and how well it handles your water system. Different materials are better suited for specific conditions:
- Stainless Steel: Prevents rust and corrosion so these work well for homes with well water or high mineral content. Examples include the Grundfos ALPHA series and Taco 006-ST4.
- Bronze: Durable and corrosion-resistant, bronze works well in systems with aggressive water conditions, where other materials might degrade faster.
- Cast Iron: Strong and good at handling heat, but it’s more likely to corrode over time, especially in systems with hard or untreated water. Best for budget-conscious installations where corrosion isn’t a concern.
- Brass: Offers excellent resistance to corrosion and long-term durability, making it versatile for various water conditions, including drinking water systems.
When considering the material of a pump, choose one based on your water quality and how long you want the pump to last. For example, stainless steel is great for tough water conditions, while cast iron might be a good fit for simpler setups on a budget.
Timers, Sensors, and Smart Features
Most modern recirculating pumps will give you different ways to control it, ranging from basic timers to advanced app connectivity. But there are also pumps that don’t come with any of these features.
Programmable Timers
Some pumps include built-in timers, letting you set specific times for the pump to run. You can program these pumps to run only during specific times, like in the morning when everyone is getting ready or in the evening when showers and dishes are happening.
This keeps your water heater and the pump from running when no one is home or when you wouldn’t normally use hot water, saving energy while still meeting your hot water demands during those peak times.
Temperature Sensors
Built-in or external temperature sensors monitor the temperature of the water in your hot water line.
Once it drops below a certain temperature, the pump automatically kicks on making sure hot water is always readily available. When the temperature is met, it will cut the pump off. It’s a fairly simple accessory, but it significantly boosts efficiency.
Some advanced systems combine temperature sensors with timers so the pump only runs during scheduled times while still maintaining consistent water temperatures.
Smart Features
Some pumps connect to apps or home automation systems like a smart plug, letting you adjust schedules and control when the pump operates. These features are especially useful for homeowners who want a hands-off, customizable option.
Push Buttons
On-demand systems include physical push-button controls that allow you to activate the pump only when you need hot water. These buttons can be installed near sinks or showers, giving you control over the pump’s operation without automated schedules.
Motion Sensors
Motion-activated pumps turn on when movement is detected near high-demand areas, such as bathrooms or kitchens. This energy-efficient feature eliminates the need for manual operation while ensuring hot water is ready when needed.
Remote Connections
For even more convenience, advanced systems allow you to control the pump remotely. Whether it’s through a mounted remote or an app on your phone, you can turn the pump on or off with just a tap.
This comes in handy on days when your routine changes—like on the weekends.
For example, let’s say you’ve been working in the yard all day and need a quick shower before heading out to dinner. You can hit the on-demand button on your phone, and hot water will be waiting as soon as you turn on the showerhead.
These features take convenience to the next level, combining efficiency and luxury to fit your lifestyle.
Pumps Without Built-In Features
Some pumps don’t come with timers, temperature sensors, or any smart features. In these cases, you’ll need to add devices like an aquastat, a smart plug, or an external timer to control the pump.
While they may be cheaper, it might end up costing you more to set the system up the way you want it.
If you value convenience and automation, choose a pump with built-in features. But for more budget-friendly options, pumps without these extras can still perform well with a little customization.
What are the Best Hot Water Recirculating Pumps for Residential Homes in 2025?
After comparing several different recirculating pumps available today, here are our picks for the best hot water recirculating pumps for residential homes:
1. Grundfos ALPHA HWR/CS Recirculating Pumps
Best Overall Hot Water Recirculating Pump
Max Flow Rate: 13.6 GPM
Max Head Pressure: 18 feet
Max Power: 38W
Max Water Temp: 203°F
Maximum Pressure: 175 PSI
Material: Stainless Steel
The Grundfos ALPHA HWR/CS pumps are one of the most advanced recirculating pumps you’ll find on the market for residential homes. The main reason why they’re our pick for the best hot water recirculating pump in 2025 is because they fit right in with basically any setup you have.
They’re compatible with tank or tankless water heaters, well or city water, and homes with or without a dedicated return line.
- HWR Model: Works with dedicated return lines.
- CS Model: Uses a crossover valve, making it ideal for homes without a return line.
Why It’s the Best Overall:
These pumps offer three operating modes:
- Continuous: For constant circulation.
- Scheduled: Use the programmable timer to match your routine.
- AUTOADAPT: Learns your water usage habits and runs only when needed.
The integrated FLOWSENSE technology maintains water temperatures between 95°F and 102°F while adjusting flow rates to prevent pipe corrosion. Operating as quietly as 25 decibels, these pumps are nearly silent, using as little as 2 watts during operation and maxing out at 38 watts when needed.
Plus, the Grundfos GO app adds convenience, letting you control schedules and monitor performance right from your phone.
If you want a smart, efficient pump that practically runs itself, the Grundfos ALPHA HWR/CS models are as good as it gets.
2. PROZRTED HBS24-12T Digital Smart Recirculating Pump
Best Under Sink Recirculating Pump
Max Flow Rate: 5.2 GPM
Max Head Pressure: 39 feet
Max Power: 70W
Max Water Temp: 158°F
Maximum Pressure: 175 PSI
Material: Stainless Steel
The PROZRTED HBS24-12T is a great hot water recirculating pump if you want a simple under sink option that doesn’t require cutting into water lines.
It installs easily under the sink farthest from your water heater, plugs into a standard outlet, and takes only 30 to 45 minutes to set up if you have some experience with plumbing.
This pump works like a crossover valve system but is entirely located under the sink. You can set your desired water temperature between 68°F and 113°F and choose from three operating modes:
- Constant Temperature: Runs 24/7 and activates automatically when the water temperature drops 5°F below your set point.
- Scheduled Mode: Runs only during specific times that you choose.
- Manual Mode: Turns on when you need it using a “HEAT” setting, turning off automatically after 10 minutes or once the temperature is reached.
A unique feature you get with this pump that you don’t typically find in others is the freeze protection.
If the water temperature in your hot water line drops below 39°F, the pump will automatically turn on until the water reaches 59°F. This feature is very useful if you live in an area that experiences freezing temperatures for long periods during winter.
Things to Know:
- The included compression hoses may be too short for some setups, so you might need to buy longer ones.
- Manual mode is efficient but less convenient if you often need hot water.
The PROZRTED HBS24-12T recirculating pump is an affordable option for first-time users or for older homes where changing the plumbing is not practical or just not preferred.
3. Taco 006-ST4 Stainless Steel Circulator Pump
Best Recirculating Pump for Homes with Well Systems
Max Flow Rate: 11 GPM
Max Head Pressure: 9.5 feet
Max Power: 65W
Max Water Temp: 220°F
Maximum Pressure: 125 PSI
Material: Stainless Steel
If your home uses well water, you know the challenges that come with fluctuating water pressure and sediment. So if you’re considering adding a recirculating pump, you’ll want one that can control both. And the Taco 006-ST4 can do just that.
Why It’s the Best for Well Systems:
- Made of stainless steel, it withstands corrosion caused by sediment.
- Its self-lubricating, seal-less design minimizes maintenance and extends its lifespan.
- Includes a check valve to prevent backflow when pressure drops.
The 1/40 HP motor delivers just the right power for well systems. It’s strong enough to maintain consistent pressure when your well pump cycles on and off, but gentle enough to prevent water hammer or strain on your pipes.
It also comes with a built-in check valve that stops water from flowing backward when your water pressure drops.
On top of that, if the cartridge that holds the motor and impeller within the pump ever goes bad, it can be swapped out for a new one, making one pump last even longer.
Things to know:
- It has to be mounted horizontally to work properly.
- Requires a hardwire electrical connection with 14-gauge wire so if you’re not familiar with running power, you’ll probably need to hire an electrician.
- The pump itself can run extremely hot at times (sometimes up to 140°F) so make sure it’s in a place that can handle the heat.
As far as how often the pump runs, it’s about as basic as you’ll find out of the box.
It doesn’t come with any built-in timers or temperature sensors, so it’d be a good idea to pair this with an Aquastat or smart plug if you want to manage when it comes on. Otherwise, it will run constantly when it’s powered up.
Also, this pump does require a dedicated return line, so you’ll only be able to use it if you have one already in place or if you plan to add one.
The Taco 006-ST4 recirculating pump might not have all the advanced features other pumps do, but it’s built to handle the unique demands of well water while delivering hot water to your fixtures quickly and efficiently.
4. Grundfos COMFORT 10-16 TDT
Best Hot Water Recirculating Pump for Energy Savings
Max Flow Rate: 2.2 GPM
Max Head Pressure: 5.25 feet
Max Power: 6W
Max Water Temp: 179°F
Maximum Pressure: 145 PSI
Material: EcoBrass housing
The Grundfos COMFORT PM 10-16 TDT is one of the most energy-efficient recirculating pumps available today. Running at a max of just 6 watts, it’s the perfect pump for eco-conscious homeowners who want a way to save water and not use up a lot of energy in the process.
Why It’s Best for Energy Savings:
- AUTOADAPT Technology: Learns your household’s hot water usage and runs only during peak times.
- Temperature Control Mode: Keeps water within your desired range using internal sensors.
- Sanitation Cycle: Automatically runs a weekly 15-minute disinfection process, preventing bacterial growth and maintaining water hygiene.
With its compact design (4-3/8 inches long), it runs quietly (under 22 decibels), and it’s easy to install (even for beginners). With different fittings for different pipe sizes, it’ll fit right into just about any setup.
The pump also comes with isolating and check valves and a pre-designed insulation shell to install over it to help reduce any potential heat loss.
Things to know:
- It uses a crossover valve at the furthest fixture.
- This pump might not be the best option if you have a larger home or if you have a long pipe run from your water heater to the furthest fixture.
If you’re looking for an eco-friendly pump that reduces energy costs and offers smart features, the Grundfos COMFORT PM 10-16 TDT will work. It provides instant hot water, helps lower your utility bills, and is built for long-term reliability.
5. BOKYWOX RS15-6SB
Best Budget-Friendly Recirculating Pump
Max Flow Rate: 9.5 GPM
Max Head Pressure: 20 feet
Max Power: 93W
Max Water Temp: 212°F
Material: Stainless Steel Pump Head, Aluminum Motor Shell
The BOKYWOX RS15-6SB is an affordable option for homeowners looking to add a recirculating pump without spending too much. While it lacks some of the advanced features found in higher-end models, it will work well in large or small homes.
Why It’s the Best for Budgets:
- Three-Speed Settings: You can adjust the flow rate to match your system’s needs, whether you want faster water delivery or quieter operation.
- Durable Design: It features aluminum housing and a stainless steel pump head for long-term use at an economical price point.
- Compatibility: Works with tank water heaters and systems that have a dedicated return line.
Things to Know:
- The BOKYWOX RS15-6SB requires manual control or pairing with a smart plug or timer to regulate operation.
- It runs quietly compared to others in the same price range but not as much as the premium models.
- You will need to purchase a crossover valve and connection hoses, as those don’t come with the pump.
If you’re looking for a basic, low-cost solution to get hot water where you need it, the BOKYWOX RS15-6SB is an excellent entry-level option. It’s a practical choice for homes that don’t require advanced features but still want a dependable recirculating pump.
6. Watts Premier 0955800
Best Recirculating Pump for Tank-Type Water Heaters
Max Flow Rate: 3.4 GPM
Max Head Pressure: 3.5 feet
Max Power: 22W
Max Water Temp: 150°F
Maximum Pressure: 145 PSI
Material: Stainless Steel
The Watts Premier 0955800 is designed specifically for tank water heaters, offering a simple installation process and reliable performance. It’s perfect for homeowners who want hot water on demand without significant plumbing modifications.
Why It’s the Best for Tank-Type Water Heaters:
- Quick Installation: The pump mounts directly onto your water heater’s outlet and includes a ½” thermal bypass valve that fits under your farthest sink, eliminating the need for a dedicated return line. Most installations take less than an hour.
- Programmable Timer: A 24-hour timer lets you control when the pump operates, ensuring it runs only when you need it. This helps save energy while keeping water ready during peak usage times.
- Quiet Operation: The pump is virtually silent and doesn’t produce vibrations, so it won’t disturb your household.
Additional Features:
- Works with all types of pipe, making it compatible with different of plumbing setups.
- Comes with a 10-foot power cord for flexible placement.
- Maintenance-free design for long-lasting performance without extra effort.
Things to Know:
This pump is optimized for systems with standard tank water heaters and may not be suitable for tankless systems or large multi-loop homes.
The Watts Premier 0955800 is a reliable and cost-effective choice for homeowners with tank water heaters who want the convenience of instant hot water without a difficult installation.
Not Feeling Confident About Installing a Recirculating Pump Yourself? Call a Pro
If plumbing or electrical work makes you nervous, there’s no shame in hiring a professional plumber. They’ll ensure everything is done safely and to code. While it might add to the initial cost, it could save you from headaches (and potential repairs) later.
A hot water recirculation pump not only saves you from spending money on gallons of water waste, but it also gives you something money can’t buy: time.
You’ll no longer have to wait for warm water while your utility bill and water usage skyrocket. Whether you decide to DIY or hire a pro, installing one is a smart move for anyone who values comfort and efficiency.
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After comparing different recirculating pumps available today, here are our picks for the best hot water recirculating pumps for residential homes.
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