![Tecmark Vacuum Switch [Cal Spas] [Replaces V4001P-DX] (V4003P-DX) waterlevelers and extend the service life](https://cdn.shopify.com/s/files/1/1751/9347/products/47-319-2000_xl.jpg?v=1486197167)
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and extend the service life of internal filter components
The white finish helps the visible side of the repair stay bright and easy to blend into many spa interiors
The Hayward exhaust-side gasket kit is designed for compatible Low NOx heater applications where the sealing components on the exhaust side need renewal
A part like this is useful because it helps support the connection of the sight glass assembly within the plumbing line
That approach often improves both confidence and overall service quality
Tecmark Vacuum Switch [Cal Spas] [Replaces V4001P-DX] (V4003P-DX) waterlevelers and extend the service lifeThe Tecmark vacuum switch is designed for compatible Cal Spas applications and serves as a replacement for V4001P DX. Vacuum switches are useful because they help the system respond appropriately to vacuum conditions that are part of normal operating or protection logic. This replacement is especially useful when the original switch is no longer sensing vacuum correctly, becomes intermittent, or has failed entirely. Using the designated replacement