Check the listing for details. AUTOHOT R150A On-demand Hot Water Recirculating Pump System.. Condition: New. Listed at 704.00 USD. Package Includes. 1 Digital Control Box. 4 pairs of screws and wall anchors. 1 insulation tape. 1 manual. 1 hardwired push button assembly. 1 (150 series) pump. 2 flanges. 4-bolts and nutsThe 150-Series water pump works best when the distance of the recirculation loop is over 200 lineal feet.Works in any plumbing system, whether you have a dedicated return line or just standard plumbing, and works with any tank or tankless water heater. You can use with the Existing Pump Up to 1/3HPSave water and energy - On-demand system will only turn on when there is hot water demand and if hot water isn’t already at the tap to save water and energy5 year limited warranty with satisfactory solution. If you are not completely satisfied with our product, please feel free to contact our customer service team.