The Aqua-Flash from AquaMotion installs quickly under sinks, and no under-sink power is required. The hot water recirculator can be fully automatic or timer selected. The timer is installed on top of the water heater and is designed for one-pipe systems. A stainless and bronze bypass valve, hose, tee, and circulator with timer are included in the system kit. 401/785-3000; www.aquamotionhvac.com.