Aquastorm Universal Pump Seal 27203-000-990

Name: Aquastorm Universal Pump Seal 27203-000-990
Brand: CMP
SKU: 27203-000-990
Price: 94.15 USD
Availability: InStock

Part #: 27203-000-990

$94.15

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

About this seal/gasket

The CMP Aquastorm Universal Pump Seal 27203-000-990 is a genuine OEM replacement seal designed for 5/8" shaft pumps across multiple spa brands. This universal seal includes a reducer for versatile fitment, making it compatible with various Aquastorm pump models and other manufacturers using the same shaft specifications. The precision-engineered design ensures reliable water-tight performance in your spa's circulation system.

At Bubbles Supply, we guarantee this CMP pump seal provides an exact fit for your pump assembly, backed by our 1-year warranty and same-day shipping on in-stock orders. The durable construction withstands spa chemicals and temperature cycling for long-lasting performance. Before installation, confirm your pump's shaft diameter matches the 5/8" specification and inspect the seal seat for damage or debris that could compromise the new seal's effectiveness.

Exact part number

27203-000-990

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

5/8" shaft seal
Aquastorm pump seal
mechanical shaft seal with reducer

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:

Water leaking from pump shaft area
Wet motor housing or dripping beneath pump body
Seal failure after chemical overexposure or freeze damage
Visible mineral deposits or corrosion around shaft seal
Pump running but losing prime due to seal bypass

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

Before you buy — quick checklist

Measure your pump shaft diameter — this seal is designed for 5/8" shafts; confirm before ordering
Inspect the seal seat (ceramic cup) in the pump housing — if it's cracked or scored, the seat must be replaced alongside this seal
Check whether your pump uses a 1/2" shaft — this seal includes a reducer, but verify your shaft size first
Confirm the seal spring orientation matches your pump's design before installation
Check for debris, pitting, or cracks on the volute face where the seal seats — a damaged surface will cause the new seal to fail prematurely

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

Medium — Some experience neededTypically 45–90 minutes

What's in the box

Mechanical shaft seal
Reducer insert for alternate shaft fitment

If your order is missing any items listed above, contact hello@bubblessupply.com within 48 hours of delivery.

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.