The UltraCircTM design incorporates a ball valve on the inlet
side of the pump, a spring check valve on the discharge side of the pump and ½ sweat union connections. The compact design saves space, the cost associated with purchasing the additional fittings and is also a huge labor-saving product for the contractor/plumber. The UltraCircTM feature is available on the SM-303 and SMT-303 series pumps. The SM-909 series pumps are available for larger plumbing circuits.