Watts Water Technologies announced that Stephen Callahan has been named national market manager for Watts’ new line of OneFlow anti-scale systems. Prior to joining Watts, Callahan held market and sales management positions with Cuno for 10 years and most recently was co-founder and president of PureTech Waters of America.

The company also announced that Paul Green has re-joined Watts as South Central regional sales manager. Green was previously employed with Watts for more than eight years. Most recently, he was regional sales manager for Red-White Valve Co. In addition, Gisela Martinez was appointed national market manager for Watts and Savard water connector products.