PresAir Trol Side Spout Pressure Switch [21A] [1 8" Barb] [SPDT] (PR11120A) magicplastics Using the wrong extension can Using the wrong extension can create panel issues that look like control failures when the real problem is the cable The TM26 fit and snap fit construction give this assembly practical value because internal filter parts work best when they match the original attachment style and geometry closely The PresAir Trol side spout pressure switch is designed for compatible systems that use a 1 8 inch barb connection and need an SPDT pressure activated switch rated at 21 amps Useful when the original switch is inaccurate or unreliable