The circulator for this tankless one-pipe system installs at the tankless unit. The circulator includes a flow control to bypass 1 gpm to the cold inlet of the tankless. When set for “On Timer” operation, the tankless will fire when temperature setting is reached. The new stainless ODR Superflow bypass valve installs under the sink on the cold angle stop and provides sufficient flow to operate the tankless. This product provides instant hot water comfort, can save up to 12,000 to 15,000 gallons of potable water annually and save on utility and sewer fees. The entire kit is UL- and NSF-listed and is patented and patent pending for the new features. AquaMotion. www.aquamotionhvac.com