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Description
The Mr. Steam Max AutoFlush is an electronically activated 1 inch NPT drain valve that empties a Max series generator automatically after each session. It waits about two hours for the water to cool, then drains by gravity, with no buttons to press. It fits Mr. Steam MX4E through MX6E generators.
Specifications (Mr. Steam)
- Model / part number: CT81500
- Compatible generators: Mr. Steam Max MX4E to MX6E
- Operation: Drains about two hours after each session, by gravity
- With Express Steam: Drains for ten minutes, then refills with fresh water to begin the pre-heat cycle
- Valve: 1 in. NPT, electronically activated, with cord
- Materials: Aluminum, brass
- Listed dimensions: 5 in. W x 3.4 in. D x 5.4 in. H
- Certifications: cULus, CE
- UPC: 767931901805
What you need to know before buying
- Fits Mr. Steam Max MX4E to MX6E generators. For MS and Super series generators, choose the AutoFlush MS81500E.
- A drain line from the generator is required and is not supplied. Have a licensed plumber install the valve and drain per the Mr. Steam manual.
- The valve connects by cord to the generator; installation is listed as hardwired in the specifications.
In the box
AutoFlush valve (1 in. NPT) with cord and installation instructions, per Mr. Steam.
Warranty
Mr. Steam 2-year limited warranty on controls and components.
Returns
Returns accepted within 30 days of delivery for unused, uninstalled items in original sealed packaging. Return shipping is paid by the buyer, and a restocking fee of up to 15% may apply (up to 50% if packaging is missing or the seal is broken). Installed items are handled as manufacturer warranty claims.
Related
Mr. Steam steam shower systems | Steam shower generators and packages
Install per the manufacturer's instructions by a licensed plumber and electrician.
Specifications
| Model / part number | CT81500 |
|---|---|
| Compatible generators | Mr. Steam Max MX4E to MX6E |
| Operation | Drains about two hours after each session, by gravity |
| With Express Steam | Drains for ten minutes, then refills with fresh water to begin the pre-heat cycle |
| Valve | 1 in. NPT, electronically activated, with cord |
| Materials | Aluminum, brass |
| Listed dimensions | 5 in. W x 3.4 in. D x 5.4 in. H |
| Certifications | cULus, CE |
| UPC | 767931901805 |
Specifications from the manufacturer. Dimensions are approximate.
Shipping
We ship to the 48 contiguous U.S. states and Washington, DC. Your shipping cost is calculated at checkout and shown before you pay.
You will get an order confirmation right away and tracking by email when your order ships. Questions about timing for a specific item? Call (945) 280-3243 or email support@restoresuite.com before you order.
Delivery
Large items such as saunas, hot tubs and cold plunge tubs usually ship by freight. The carrier contacts you to schedule delivery. Please check the packaging and note any damage on the delivery receipt before you sign, then tell us within 48 hours so we can resolve it for you.
Before delivery day, measure doorways and hallways along the path to the install spot, and confirm the electrical requirement on the Specifications tab.
Warranty
Mr. Steam 2-year limited warranty on controls and components.
Warranty coverage for this product is shown above or in the description. If anything arrives damaged or stops working, contact us with your order number and we will help you get it resolved.
Reviews
What delivery looks like


Why this one
An automatic 1 in. NPT drain valve for Mr. Steam Max MX4E to MX6E generators, draining about two hours after each session.
- Drains the generator automatically after each session
- Waits about two hours so the water cools first
- Fits Mr. Steam Max MX4E to MX6E generators
- 1 in. NPT electronic valve, cULus and CE listed

Key specs at a glance
The numbers to check before you order. Full details are on the Specifications tab.
- Listed dimensions
- 5 in. W x 3.4 in. D x 5.4 in. H
Before you buy: what to know
Based on the manufacturer's specs, manuals and our research.
- Check your generator series before ordering: Max MX uses CT81500, MS and Super use MS81500E.
- The drain line is not included.
Not sure this is the right fit? Ask us or call (945) 280-3243.
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