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Valterra Adapter RF850 - Bubbles Supply

Valterra Adapter RF850

Part #: RF850

$1.70
In stock — ships today
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🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
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Fits these systems

Valterra

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

Before you buy — quick checklist

  • Confirm your existing fitting is a 1/4" male pipe thread on one end and 3/8" raised bead on the other — do not assume by sight alone
  • Inspect the mating port on your spa drain assembly to verify thread pitch and bead groove dimensions match
  • Check whether your spa uses a straight (inline) adapter vs. an angled adapter — this is a straight fitting only
  • Ensure the replacement adapter material (typically ABS or similar) is compatible with your spa's plumbing and any chemicals in use
  • Have appropriate thread sealant (PTFE tape or pipe dope rated for plastics) on hand before starting

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

Exact part number

RF850

Save this for ordering or warranty claims

Common symptoms this part fixes

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

  • Slow or restricted drain flow
  • Leaking at drain plug connection
  • Mismatched thread fittings preventing proper seal
  • Drip or seep at 1/4" MPT to 3/8" bead transition
  • Cracked or damaged existing adapter causing water loss

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

About this union/fitting

The Valterra RF850 Adapter is a straight drain plug adapter designed for spa plumbing systems requiring a 1/4" male pipe thread to 3/8" raised bead connection. This OEM-quality fitting provides a secure, leak-free transition between different pipe thread types in your spa's drainage system, ensuring proper water flow and system integrity.

Engineered with Valterra's precision manufacturing standards, this adapter delivers the exact fit guaranteed for reliable performance. We ship same-day from our Canadian warehouse and back every part with our comprehensive 1-year warranty for complete peace of mind. When installing, ensure threads are clean and use appropriate thread sealant to prevent leaks and maintain optimal seal integrity.

Also known as / Replaces

This part replaces or is interchangeable with:

  • 1/4 MPT to 3/8 raised bead adapter

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

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.

AI Fitment Assistant

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

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