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![PresAir Trol Vacuum Switch [21A] [1/8](https://cdn.shopify.com/s/files/1/1751/9347/products/47-369-2000_xl.jpg?v=1486194855)
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Using the proper Hayward hardware can help restore cleaner fitment
Smaller jet components can be difficult to remove or install cleanly with general-purpose tools
A pre-filter can be a smart addition when the goal is to improve incoming water quality before it reaches the spa
or no longer advances the dial consistently
Durable material
PresAir Trol Vacuum Switch [21A] [1/8" MPT] (VS12506E) pleatco Using the proper Hayward hardwareThe PresAir Trol vacuum switch is designed for compatible systems that use a 1 8 inch MPT connection and need a 21 amp vacuum responsive control component. Vacuum switches are useful because they help the system respond appropriately to vacuum conditions that may be part of normal operating and safety logic. This replacement is especially useful when the original switch has become inconsistent, no longer reacts to vacuum changes properly, or causes
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