The water heater tempering valve from Webstone, a brand of NIBCO, mixes cold water from the supply with the hot output from the heater for more effective hot-water storage. Hot water can be stored to 140 degrees F, mitigating the risk of Legionella bacteria in the tank. Adjustable temperature control limits output to 120 degrees F and prevents the risk of scalding. Installation kits include the lead-free valve, temperature gauge, and two ProPush flexible connectors for integration with the rest of the system. 800/255-9529; www.webstonevalves.com.