Recirculating Pump On A Tankless Water Heater

Understanding Recirculating Pumps for Tankless Water Heaters: Hot Water on Demand, Instantly

Waiting for hot water is a frustrating inconvenience, especially with tankless water heaters. While tankless systems provide endless hot water, the distance the water travels from the heater to the faucet can mean a significant wait for hot water to arrive. This is where a recirculating pump comes in. This article explores how recirculating pumps work with tankless water heaters, their benefits, drawbacks, and factors to consider before installation.

What is a Recirculating Pump?

A recirculating pump is a small, electrically powered pump that constantly circulates a small amount of hot water through a dedicated loop of piping. This loop typically connects the tankless water heater to the furthest hot water fixture in the house (often a kitchen sink or bathroom). By maintaining a continuous loop of hot water, the pump eliminates the wait time associated with cold water traveling through pipes before hot water arrives.

How it Works with Tankless Water Heaters:

The pump continuously circulates hot water within the dedicated loop. When a hot water tap is turned on, hot water is immediately available, eliminating the delay of waiting for hot water to travel from the heater. The system usually includes a temperature sensor and a mixing valve to maintain a comfortable temperature within the loop.

Benefits of Using a Recirculating Pump with a Tankless Water Heater:

• Instant Hot Water: This is the primary benefit. No more waiting for hot water to reach the faucet, saving time and water.
• Reduced Water Waste: Eliminates the need to run the tap until hot water arrives, conserving water and reducing water bills.
• Increased Comfort: Provides a more consistent and comfortable hot water experience, particularly beneficial for homes with longer pipe runs.
• Energy Efficiency (Potentially): While the pump consumes electricity, the reduction in water waste can offset some energy costs, especially if you frequently use hot water.

Drawbacks of Using a Recirculating Pump:

• Cost: The initial cost of purchasing and installing a recirculating pump can be significant. This includes the pump itself, additional plumbing, and potentially electrical work.
• Energy Consumption: The pump constantly runs, consuming electricity. This needs to be weighed against the energy saved from reduced water waste.
• Complexity: Installation can be more complex than a standard hot water system and may require professional plumbing and electrical expertise.
• Maintenance: Like any mechanical device, the pump requires occasional maintenance and may need replacement over time.

Factors to Consider Before Installation:

• Pipe Length: The longer the distance between the tankless water heater and the furthest fixture, the greater the benefit of a recirculating pump.
• Hot Water Usage: If hot water usage is infrequent, the energy consumption of the pump may outweigh the benefits.
• Budget: Installation costs can vary significantly. Consider the total cost before making a decision.
• Home's Plumbing Configuration: Assess whether your home's plumbing is suitable for a recirculating pump loop. Professional consultation is recommended.
• Pump Type and Size: Choose a pump appropriate for the size of your home and hot water demand.

Conclusion:

Recirculating pumps offer a convenient solution to eliminate the wait for hot water in homes with tankless water heaters, particularly those with longer pipe runs. However, the cost, energy consumption, and installation complexity must be carefully considered. Weighing the benefits against the drawbacks, and consulting with a qualified plumber is crucial before deciding whether a recirculating pump is the right investment for your home. Careful consideration of your hot water usage patterns and home's configuration will help determine if this upgrade truly enhances your comfort and efficiency.