10 Best Hot Water Recirculating Pump 2025 in the United States

The Watts Heat H2O Hot Water Recirculation System promises instant hot water at every faucet and shower, thanks to its thermal bypass technology. This can save significant amounts of water—up to 15,000 gallons per year—by reducing the wait time for hot water. It's designed for easy DIY installation, compatible with most existing plumbing systems, and does not require a return line or additional electricity under the sink. This makes it a great choice for homeowners looking to upgrade their plumbing without professional help.

The included programmable timer adds to its convenience by allowing users to set it to run during peak times or continuously, depending on their needs. The system operates quietly and is energy efficient, using a 120V power source and a stainless steel pump head in an aluminum housing for durability. However, it is important to note that this system is not suitable for tankless water heaters.

While the product has received positive reviews for its performance and ease of installation, some users may find the initial setup slightly challenging due to the need to follow precise instructions and handle multiple components. If you're looking for a reliable and efficient hot water recirculating pump that conserves water and energy, and you have a traditional water heater, this product could be a strong contender.

The Grundfos GRU-595916 Recirculating Hot Water Pump Comfort System offers several appealing features for those in need of instant hot water throughout their home. With a flow range of 0 - 9 gallons per minute (GPM) and a head pressure of up to 6 feet, it can efficiently circulate hot water through most domestic systems. The pump is powered by a single-phase 115V motor and is corded electric, which ensures consistent operation without the need for batteries.

The installation complexity is relatively low, making it accessible for homeowners without advanced plumbing skills. Additionally, the included timer and line cord add convenience to its setup and operation. The pump operates quietly and boasts low energy consumption, which is a significant advantage for energy-conscious users. The maintenance-free design further reduces the hassle of regular upkeep, contributing to its reliability and ease of use. Compatibility with existing plumbing is facilitated by the standard 3/4-inch connections, which should fit most household setups without requiring additional adaptors.

It's worth noting the pump's maximum lifting height is only 6 feet, which might limit its application in larger multi-story homes. Also, while it is designed for heating systems, its versatility extends to cooling and air-conditioning systems, adding to its utility. Given its robust construction from bronze and stainless steel, this pump is built to last, and the 2-year warranty provides some peace of mind. The product's availability since 2006 might mean there are newer models with advanced features, but the Grundfos GRU-595916 remains a strong contender for those seeking a reliable and efficient hot-water-recirculating pump for their home.

The Rheem IKONIC RECTGH-SR11iP Super High Efficiency Condensing Tankless Liquid Propane Water Heater with Recirculation stands out in the hot-water-recirculating pump category. With a maximum flow rate of 11.2 GPM, it can provide continuous hot water throughout your home, even when multiple applications are in use, making it ideal for larger households. The built-in recirculation feature is a significant advantage, reducing water wastage and saving on energy costs, a point that aligns well with its high energy efficiency rating.

Users will appreciate the customizable built-in Wi-Fi technology, which allows for easy control and monitoring of settings, usage, and maintenance alerts via mobile devices. The ultra-low NOx burner is beneficial for environmentally conscious users, as it helps reduce greenhouse gas emissions. On the downside, the installation might be complex due to the multiple components included (PRV, service valves, crossover valve kit, vent termination). Additionally, the unit is relatively heavy at 86 pounds, which could add to the installation difficulty. The noise level isn't specified, but as with many tankless water heaters, some noise might be expected during operation.

The compact design and flexible installation options, including outdoor capability with a conversion kit, add to its versatility. Compatibility with existing plumbing is generally good, but any specific requirements should be checked before purchase. This water heater is a strong contender for households seeking efficiency, sustainability, and smart technology integration.