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1.5" Dome Lens 400-18B - Bubbles Supply

1.5" Dome Lens 400-18B

Part #: 400-18B

$7.13
In stock — ships today
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this lighting

This 1.5" dome lens is a genuine OEM replacement part designed specifically for Dimension One Spas lighting systems. The clear dome lens protects your spa's underwater lighting while maintaining optimal light transmission for enhanced ambiance during evening soaks. This decorative lens ensures your spa lighting performs as originally designed by the manufacturer.

At Bubbles Supply, we guarantee this dome lens will be an exact fit for your Dimension One Spas system. Every part ships the same day you order and comes backed by our comprehensive 1-year warranty for complete peace of mind. Installation is straightforward – simply remove the old lens and replace with this OEM component. Verify your existing lens diameter measures 1.5" before ordering to ensure proper fitment.

Exact part number

400-18B

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • dome light lens
  • spa lens cap
  • spa light cover
  • underwater light lens

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:

  • Cracked or shattered lens housing
  • Lens fogged or yellowed, reducing light output
  • Water intrusion into light fixture cavity
  • Missing or broken lens after impact
  • Light appears dim despite functioning bulb

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

Before you buy — quick checklist

  • Measure your existing lens diameter — this part is 1.5 inches
  • Confirm your spa is a Dimension One Spas model
  • Inspect whether the lens retaining ring or gasket also needs replacement
  • Check if the light fixture body itself is damaged, not just the lens

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

Install difficulty: Easy — DIY-friendlyTypically 15-30 minutes

Warranty

1 year 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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