Supco NPW1H - Negative Pressure Trap - 1” x 1” Connection - Horizontal Mounting - White

Typically, HVAC equipment is fitted with “P” traps that require water within a trap to prevent air from leaving or entering the unit. As a result, the “P” traps are susceptible to freezing. At other times, the traps dry out allowing air to escape or enter the HVAC equipment. In negative pressure systems this can result in condensate backing up in the equipment and spilling into ductwork or down into the building causing damage. In positive pressure systems, an ineffective trap results in conditioned air being expelled and loss of equipment capacity/efficiency. Des Champs Waterless Traps are available in N-Series for negative pressure and P Series for positive pressure applications. Both are available in 3/4”, 1”, 1-1/4”, 1-1/2” line sizes and transparent or white PVC bodies.