Smith Fluid Controls™ Trap Primers are designed to deliver water to floor drain P-traps, preventing trap seals from evaporating and allowing sewer gases to enter the building. The selection includes mechanical pressure-drop models that activate automatically when system pressure drops, and electronic models with factory pre-set 24-hour discharge cycles. Electronic models are available in surface-mount and flush-mount configurations, with options to prime from 1 to 36 traps. Select models are compatible with Building Management Systems.