PresAir Vacuum Switch VM12540E-300

Name: PresAir Vacuum Switch VM12540E-300
Brand: PresAir
SKU: VM12540E-300
Price: 127.41 USD
Availability: InStock

Part #: VM12540E-300

$127.41

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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this maintenance/tool

The PresAir Vacuum Switch VM12540E-300 is a heavy-duty SPDT sensor designed for hot tubs and spas requiring reliable vacuum detection and switching. This 25-amp rated switch handles high-current loads while providing precise vacuum sensing at 300 water inches, making it essential for proper spa operation and safety systems.

Built to OEM specifications, this PresAir vacuum switch delivers exact fit guaranteed performance with our same-day shipping and comprehensive 1-year warranty. The robust SPDT (Single Pole Double Throw) design ensures dependable switching between circuits when vacuum conditions change, whether you're dealing with heating issues, circulation problems, or equipment protection needs. Verify your existing switch specifications and vacuum requirements before installation to ensure proper system operation and safety compliance.

Exact part number

VM12540E-300

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Also known as / Replaces

This part replaces or is interchangeable with:

300 water inch vacuum switch
PresAir VM12540E-300
SPDT vacuum pressure switch

Looking for an older part number? Check our supersession lookup tool

Technical specifications

Amperage: 25A

Common symptoms this part fixes

If your spa is showing any of these signs, this part is likely your fix:

Spa heater not activating despite adequate water flow
Circulation pump runs but heater never engages
Spa throws heating fault codes (HH, ICE, OH) intermittently
Heater cycles on and off erratically
Spa control board not receiving flow confirmation signal
Equipment protection system failing to trigger on low-flow conditions

Not sure if this is your problem? Try our diagnostic centre or .

Before you buy — quick checklist

Confirm your existing switch is rated at 300 water inches vacuum — do not assume all PresAir switches share the same setpoint
Verify the switch is SPDT (Single Pole Double Throw) — compare terminal configuration to your current unit before ordering
Check that your existing switch is a PresAir VM12540E series to ensure direct OEM replacement
Test your current switch with a vacuum gauge before replacing — confirm it's the failed component, not a blocked port or kinked tubing
Inspect the vacuum sensing port and tubing for cracks, clogs, or loose fittings before installation
Check your control board for burn marks or damaged terminals — a failed switch can sometimes indicate a deeper electrical fault

Reading the checklist now prevents 90% of returns. Worth the 60 seconds.

Medium — Some experience neededTypically 30–60 minutes

Warranty

1 year manufacturer warranty against defects

Covers manufacturing defects. Does not cover improper installation, normal wear, or accidental damage.

Warranty claims: warranty@bubblessupply.com

Perfect Fit Guarantee

Ordered with our help and the part doesn't fit? Contact us before installation. We'll resolve it with an exchange, replacement recommendation, or return approval.

Learn about our Perfect Fit Guarantee →

Shipping

We ship across the US and Canada. US orders ship from our US warehouse to US customers; Canadian orders ship from our Canadian warehouse to Canadian customers — no cross-border shipping, no surprise duties. In-stock orders placed before 3pm CT ship same day. Standard shipping $9.95 flat rate. Free shipping on orders over $200. Express options available at checkout.

Returns

30-day hassle-free returns on unused parts in original packaging. Contact us before returning to receive your RMA number.

Frequently asked questions

Check the Compatibility section above to confirm fitment for your spa brand and model. If your model is not listed, use our fitment selector at /pages/find-my-part or ask our parts AI for a personalized recommendation.

In-stock orders placed before 3pm CT ship the same day. You will receive tracking information by email as soon as your order ships.

We accept returns within 30 days of delivery for unused items in original packaging. Email returns@bubblessupply.com with your order number to start a return. Installed electrical parts cannot be returned for safety reasons.

Yes, all new parts come with a 1-year warranty against manufacturing defects. Warranty does not cover damage from improper installation or normal wear and tear.

Customer reviews

AI Fitment Assistant

Tell us your spa model and we will confirm this part fits before you buy.