Installing a recirculating pump on a water heater can improve water heating efficiency, reducing water waste and providing hot water on demand. The process involves connecting a pump to the existing water heater system to maintain hot water flow throughout the plumbing. This guide details the installation process, performance checks, and maintenance tasks.
Understanding Recirculating Pumps
Recirculating pumps are designed to ensure hot water is readily available at taps, minimizing the time spent waiting for the water to heat up. Most commonly, these pumps are installed above the water heater, though some models are designed for installation under a sink fixture, integrating the sensor valve directly into the pump unit. A key component of many systems is a sensor valve, typically installed at the farthest sink from the water heater. These pumps can utilize existing plumbing, often employing the cold water line as a temporary return line. The sensor valve opens when the hot water temperature drops to approximately 95 degrees Fahrenheit, allowing lukewarm water to circulate back to the heater.
Installation Steps
The installation process requires careful attention to detail and adherence to safety precautions. The first step involves shutting off power to the water heater at the electrical panel, typically a 30-amp breaker. If the water heater is gas-powered, the gas valve should also be turned off.
The following steps outline the installation procedure:
- Measure Pipe Lengths: Accurate measurement of pipe lengths is crucial for ensuring proper fitting connections.
- Choose Installation Location: Select a location near the water heater and the fixture requiring hot water.
- Cut Pipes: Use a pipe cutter to create clean cuts in the hot water supply line where the pump will be installed.
- Install Fittings: Securely attach appropriate pipe fittings to both ends of the recirculating pump to ensure a watertight seal. Teflon tape should be used on the threads.
- Mount the Pump: Secure the pump to the chosen location using screws or mounting brackets, ensuring stability and proper alignment with the plumbing. The pump should be oriented correctly, following any directional arrows on its casing.
- Insulate Pipes: Wrap any exposed pipes with pipe insulation to retain heat and increase efficiency.
- Identify Power Source: Locate a compatible electrical outlet for the pump’s power requirements. A dedicated circuit may be necessary if the existing circuit is overloaded.
- Wire the Pump: Follow the pump’s wiring diagram for correct installation, ensuring all connections are secure.
- Test for Power: After wiring, turn on the power to verify the pump operates correctly and listen for any unusual noises.
- Connect Water Supply Lines: Connect the cold water line to the pump’s inlet and the outlet to the hot water line on the water heater.
- Install Return Line and Check Valve: Install a return line leading to the furthest fixture from the heater to maximize efficiency. A check valve should be positioned along the return line to prevent reverse water flow.
Specific Considerations for Tankless Water Heaters
Installing a recirculating pump on a tankless water heater requires specific attention. Begin by turning off the power to the heater. Connect the pump to either the cold water inlet or the hot water outlet, depending on the specific model and manufacturer’s guidelines. Compatibility with the tankless water heater model must be verified.
Cost of Installation
The installation cost can vary depending on the complexity of the project and local labor rates. Generally, installation costs range from $400 to $800. Obtaining a quote from a professional is recommended for a more accurate estimate.
Positioning for Optimal Performance
For optimal performance, the recirculating pump should be installed close to the water heater to minimize water travel distance. Positioning it on the hot water line facilitates maintaining hot water throughout the system. Installing the pump on the return side is often most effective, pulling water from the furthest fixture back to the heater.
Performance Checks
After installation, verifying the system’s performance is crucial. Measure the water temperature at various fixtures after the pump has been running for approximately 10 minutes. The time it takes for hot water to arrive should ideally be no longer than a few minutes at each location. If delays are observed, re-evaluate the plumbing layout or adjust the pump’s settings, including the timer or speed. If issues persist, professional assistance is recommended.
Regular Maintenance Tasks
Maintaining the recirculating pump is essential for efficient operation and longevity. Routine inspections should include checking for visible leaks around the connections, tightening fittings as needed, and flushing the pump to prevent buildup. The intake and return lines should be clear and insulated to maintain efficiency. Documenting any issues encountered during testing can aid in addressing them later. Regular inspections after installation help maintain the system over time.
Safety Precautions
Prior to beginning any installation, it is vital to turn off both the power and gas supply to the water heater. If the piping above the water heater is not easily removable flex piping (such as stainless steel braided), and it is copper or CPVC, it is recommended to have a qualified plumber perform the installation. Some cities and counties may require a permit obtained through a licensed plumber.
Source Reliability and Considerations
The provided documentation highlights the importance of following the manufacturer’s instructions for proper alignment and compatibility. It is always best to contact a qualified plumber if doubts arise. The information presented is based on the Watts 500800 Hot Water Recirculating Pump as a primary reference, and variations may exist for other models.
Conclusion
Installing a hot water recirculating pump can significantly improve home efficiency and convenience by providing hot water on demand. The process involves careful planning, precise installation, and regular maintenance. Following the steps outlined in this guide, and consulting with a qualified professional when necessary, will ensure a successful installation and long-term performance.