PresAirTrol Side Spout Pressure Switch [21A] [1/8" Barb] [DPDT] (PR21120A)

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PresAirTrol Side Spout Pressure Switch [21A] [1/8" Barb] [DPDT] (PR21120A) is a replacement heater or heater service component from Presair Trol for compatible pool, spa, or bath h eating systems. It is used when servicing worn, damaged, or failed heater assemblies where the correct model series, fuel or voltage configuration, sensor style, element size, or hardware fit must be matched. Use part number PR21120A when matching this item to an existing component, owner’s manual, parts diagram, or service record. Key identifiers and configuration details include 21A, 1/8" Barb, DPDT. Using the correct replacement part helps support dependable heating performance, safe operation, and proper equipment service.Heater parts should be selected by exact part number and application details. Confirm electrical ratings, gas type, element dimensions, plumbing connections, and model compatibility before ordering, and have installation performed by a qualified service professional when required. Genuine or listed Presair Trol replacement option for Heater Parts applications Designed for matching by part number, equipment model, and physical configuration Useful for repair, rebuild, routine maintenance, or replacement service Compare size, voltage, color, connection type, and model details before ordering Professional installation is recommended for heater, gas, electrical, and pressure-sensitive repairs Show more