If you’re tired of waiting for hot water to reach your faucet, a hot water recirculating pump might be the solution. This device can save time, water, and energy by making hot water readily available at your taps.
We recommend professional installation for this project, but it’s helpful for homeowners to understand how these systems function. In the video above, This Old House plumbing and heating expert Richard Trethewey explains how a recirculating pump works, its benefits, and what to consider before installing one.
How Hot Water Recirculating Systems Work
A hot water recirculating system provides instant hot water at your faucets, eliminating the need to clear the pipes with cold water. This is particularly helpful in big homes or buildings where the water heater is far from the point of use.
These pumps operate by continuously circulating hot water through your plumbing system. Here’s how:
- A separate water pipe, called a recirculation line, runs from the farthest plumbing fixture back to the water heater.
- A pump at the water heater moves hot water through this line.
- Any cold water in the recirculation line is returned to the heater for reheating.
- When you turn on a hot water tap, hot water is immediately available.
Components of a Recirculating System
A typical hot water recirculating system consists of several key components:
- Recirculation pump: The heart of the system, responsible for moving water through the pipes. The pump in the video is stainless steel, but they can also be bronze.
- Check valve: Ensures that water flows only in one direction, preventing backflow.
- Aquastat: A temperature-sensing device that shuts off the pump when hot water returns to the heater.
- Timer: Controls when the system operates, allowing you to turn it off when you’re asleep or away. Some modern ones have smart features that learn and program themselves to your schedule.
- Recirculation line: The dedicated pipe that carries water back to the heater.
Modern systems often combine multiple components into a single unit for easier installation and operation.
Benefits of Installing a Hot Water Recirculating Pump
Installing a hot water recirculating pump offers the following advantages:
- Convenience: Provides hot water on demand throughout your home.
- Energy savings: Properly controlled systems can be more energy-efficient than traditional setups.
- Water conservation: Reduces water waste by eliminating the need to run taps while waiting for hot water.
Although these systems can be expensive upfront, the long-term benefits can justify the price.
Types of Recirculating Pumps
There are several types of recirculating pumps that work for different home layouts and needs. In the video, Tretheway shows both a full recirculation system and a point-of-use pump.
Full Recirculation Systems
Full recirculation systems require a dedicated return line from the farthest fixture back to the water heater. While these systems are effective, they can be challenging to install in existing homes due to the need for additional plumbing. However, they eliminate cold water in the lines, making getting hot water from your fixtures even easier.
Point-of-Use Pumps
Point-of-use pumps are installed at specific fixtures. These are easier to retrofit in existing homes but may not be as efficient as full systems. They’re convenient for homeowners who want instant hot water at particular locations.
Recirculating Pump Installation Considerations
Installing a hot water recirculating pump requires careful planning and execution. Here are some key factors to consider:
- Electrical requirements: Make sure the pump has the proper electrical connections available to function effectively.
- Local building codes: Always check and comply with local regulations to ensure a safe and legal installation.
- Plumbing layout: The complexity of your home’s plumbing will affect the installation’s difficulty.
- Pump location: These units are typically installed near the water heater for optimal performance.
Optimizing Recirculating Pump Performance for Hot Water
To get the most out of your recirculating pump, consider these tips:
- Adjust the aquastat to an appropriate temperature to balance comfort and energy efficiency.
- Insulate hot water pipes to minimize heat loss and maintain water temperature.
- Regularly maintain and clean the pump to ensure efficient operation and longevity.
- Use a timer to operate the pump only during peak usage times, reducing unnecessary energy consumption.
Environmental Impact of a Recirculating Pump
Installing a hot water recirculating pump benefits the environment by reducing water waste and optimizing your energy use. However, always make sure you use your timers and aquastats effectively so that you’re saving rather than expending extra energy. Also, consider the energy source for your water heater. Homes using renewable energy sources will find even more environmental benefits.
Technological Advances in Recirculating Systems
Technological advancements have made recirculating pumps smarter and more efficient in recent years. Modern systems can learn your household’s hot water usage patterns and adjust operations accordingly. For instance, some of these systems integrate with home automation platforms, allowing homeowners to control and monitor their recirculating pumps via smartphone apps.
Choosing the Right System for Your Home
Selecting the appropriate recirculating pump for your home depends on several factors, including your plumbing layout, budget, and specific needs. We recommend consulting a professional to make an informed decision. They can give you the best options for your home and ensure a proper and effective installation. A consultation can also address any concerns you may have about installation, maintenance, and potential energy savings.
Maintenance Tips to Extend a Recirculating Pump Lifespan
Proper maintenance extends your hot water recirculating pump’s lifespan and keeps it operating efficiently. Regularly check for any signs of wear or damage, and address them promptly to prevent more significant issues. Here are some maintenance tips to keep your system in top condition:
- Inspect the pump regularly for any visible signs of wear or damage.
- Clean the system to remove any sediment or build-up that may hinder performance.
- Test the check valve to make sure it’s functioning correctly and preventing backflow.
- Monitor the aquastat settings to maintain appropriate water temperature.
Our Conclusion
Hot water recirculating pumps are a practical solution for homeowners tired of waiting for hot water. They provide convenience, conserve water, and can lead to energy savings when properly installed and controlled. While there are considerations to weigh, many find that the benefits of instant hot water outweigh the initial investment. Additionally, the environmental benefits are an added incentive for those looking to make their homes more sustainable.