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40" M7 BP7 Lo Flow Heater 28-V375-DS-7T-K - Bubbles Supply

40" M7 BP7 Lo Flow Heater 28-V375-DS-7T-K

Part #: 28-V375-DS-7T-K

$1022.22
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About this heater

The HydroQuip 40" M7 BP7 Lo Flow Heater (28-V375-DS-7T-K) is a premium OEM replacement heater designed for HydroQuip spa systems requiring low flow operation. This genuine HydroQuip heater features a 40-inch M7 sensor configuration and BP7 low flow design, making it ideal for spas experiencing heater failure, overheating issues, or inadequate heating performance.

Built to HydroQuip's exacting standards, this heater delivers reliable performance and energy-efficient operation for your spa system. At Bubbles Supply, we guarantee an exact fit for your application and provide same-day shipping on in-stock items, backed by our comprehensive 1-year warranty. The 40-inch sensor length and M7 configuration ensure proper temperature monitoring and system protection. Verify your existing heater's part number and sensor length before installation to ensure compatibility with your spa's control system and plumbing configuration.

Exact part number

28-V375-DS-7T-K

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Also known as / Replaces

This part replaces or is interchangeable with:

  • 28-V375-DS-7T-K Heater Assembly
  • HydroQuip Lo Flow Heater
  • M7 BP7 Heater

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

Common symptoms this part fixes

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

  • Spa not heating or heating very slowly
  • OH (overheat) fault code on control panel
  • HH (high heat) fault code on control panel
  • Heater element failure — no continuity on element
  • Spa trips breaker during heat cycle
  • Erratic or inaccurate water temperature readings

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

Before you buy — quick checklist

  • Match the part number exactly — confirm 28-V375-DS-7T-K on your existing heater label before ordering
  • Verify sensor length is 40 inches — measure from manifold to sensor tip on your current heater
  • Confirm your control system is a HydroQuip BP7 series — this heater is matched to that board
  • Check that your spa plumbing is configured for low flow — this is not a standard flow heater
  • Inspect existing heater unions and gaskets before install — replace o-rings or gaskets if worn to prevent leaks after installation

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

Install difficulty: Medium — Some experience neededTypically 45-90 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.

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