RuiHang WP596816 OEM Replacement Watts Hot Water Recirculating Pump Kit for 500800/500805 – Includes 2 Supply Lines & Fittings

Efficient hot water delivery for homes

RuiHang’s WP596816 OEM replacement kit is designed to work with Watts hot water recirculation pumps, supporting models 500800, 500805, and HWRS-WH. It helps bring hot water to taps along branched lines from the heater or to distant fixtures, without requiring a dedicated return line. This kit focuses on practical performance and straightforward installation, offering a sensible upgrade for homes seeking quicker access to hot water.

At the heart of the system is a sensor valve that opens when hot water cools and nudges water back toward the heater. It closes at 98°F, which helps maintain comfortable temperatures at taps while reducing the wait time between hot water moments. You can imagine stepping into a bathroom and finding warm water ready sooner, making routines a touch more convenient without changing your existing plumbing layout.

What’s included

• Two 12-inch supply lines
• Two 1/2 inch FPT to 3/8 inch MPT fittings
• Two mounting screws

Installation and setup

• Simple design with no extra parts needed beyond what’s included
• Can be installed parallel to existing valves for faster recirculation

Usage notes and compatibility

Designed for indoor use with standard tank-type heaters and all common residential pipe types. It is not intended for tankless systems or outdoor installations, and it is not a replacement for dedicated return lines.

Durability and reliability

Constructed from heat-resistant and corrosion-resistant materials, this kit is built to endure daily use and provide consistent performance over time.

Think of this kit as a practical option for homes with multiple bathrooms or longer runs from the heater, where faster hot water access could improve daily routines. The combination of a compact sensor valve, reliable fittings, and straightforward installation makes it a feasible upgrade for many standard residential setups.