![PresAir Trol FF Switch [Center Spout] [Blue Cam] [Threaded] (MTB-311A) skimfilters Useful for extended equipment layouts](https://cdn.shopify.com/s/files/1/1751/9347/products/59-369-1380_xl.jpg?v=1486194814)
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Useful for extended equipment layouts and retrofit work
and other supported operating modes
the whole assembly can feel less secure than it should
When a sensor cable fails or begins sending unreliable readings
That added protection matters in systems where water movement and heater activation must stay in sync
PresAir Trol FF Switch [Center Spout] [Blue Cam] [Threaded] (MTB-311A) skimfilters Useful for extended equipment layoutsThe PresAir Trol FF Switch [Center Spout] [Blue Cam] [Threaded] (MTB 311A) is an air control or air switch component from Presair Trol, intended for compatible spa and bath systems where correct fit and responsive operation are required. The listed part number is MTB 311A, making it easier to match this item against an existing component, parts diagram, or previous service record. Key listed details include Center Spout, Blue Cam, Threaded, 311A,