Lawler's Manifold Recirculation System utilizes Lawler's patented Hi-Low Thermostatic Mixing Valves incorporated into an easy-to-install, turnkey unit which includes an engineer specific recirculation pump, circuit setting balancing valve, thermometers, ball valves and mounting strut. Lawler's Manifold Recirculation System utilizes Lawler's ASSE 1017 Approved mixing valves.