Mist | Mist Fittings | Brass Automatic Drain Valve | Brass Automatic Drain Valve

3/8 Inch Auto Drain Valve | 10115

Item ID:

Prevents premature mist nozzle clogging and prolongs the life of your misting system
Versatile installation: install in any fitting with a 10/24 female-threaded opening or at the end of any Orbit Slip-Lok
High-quality brass construction
Easy to install
4-year warranty
For outdoor use with cold water only

Product may vary in overall size as we transition to a newer shorter design.

$5.39

In stock

Free returns on all eligible orders.

You have 30 days to request a return. All discontinued items are exempt.

The Mist Auto Drain Valve is an essential component for any outdoor mist cooling system. It is designed for installation in one of two ways: either thread it into a 10/24 female-threaded nozzle opening or insert it into any professional Slip-Lok fitting. The auto drain valve is used to drain water from the mist line when it is not in use. It operates as a siphon by drawing the water out of the system once it is no longer pressurized. When installed at low points in the mist line, it works with gravity and allows water to automatically drain from the line; this reduces nozzle clogging and prolongs the life of your mist system.

We offer free standard shipping on orders over $50. Most orders ship within 3–5 business days (placed before 12 PM MT, Mon–Fri). A tracking number will be emailed once your order ships, and you can also check order status in your account. Note that some oversized or heavy items (large pipe lengths, valve boxes, pumps) may not qualify for free shipping. [View full shipping details →]

Products purchased through Orbitonline.com are eligible for a refund within the first 30 days of the original order placement. We accept returns on a case-by-case basis. Accepted returned products must be new and unused and in their original packaging. We reserve the right to verify the condition of all returned products before determining refund or exchange eligibility. Orders above $500.00 may be subject to return freight charges and a restocking fee. [View full Returns details →]

Frequently asked questions

Some questions and answers are automatically generated.

Is this valve easy to install?

Yes. Multiple customers report straightforward installation, and the product description confirms it is designed to be easy to install.

Will this fit my existing couplers and fittings?

The valve is designed for 10/24 female-threaded openings or Orbit Slip-Lok fittings. However, some customers have reported fitment issues with couplers, noting the newer design is shorter than pictured online. Check your specific coupling type before ordering.

What is the physical size of this valve?

The product description notes that the valve may vary in overall size as the manufacturer transitions to a newer shorter design. Customers have described recent units as less than an inch in length and stubby in shape.

Does it really prevent nozzle clogging?

Most reviewers report it works as intended for draining and preventing premature nozzle clogging, though the sample size of detailed feedback is small.

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5 stars: 4 (57%)
4 stars: 1 (14%)
3 stars: 1 (14%)
2 stars: 0 (0%)
1 star: 1 (14%)

3/8 Drain valve

I guess the shape of the drain valve has changed.. The one I received is NOT like the picture on your website, but I guess it works... It's a short, stubby, less than an inch in length. You MIGHT want to check the web picture vs the product that is sent out...

We appreciate your feedback on the image of our Drain Valve from our website. We are always looking for ways to improve and will look into how we can make our product images appear more accurate. Our Customer Care team is happy to help with any further assistance that may be needed in the future, or to answer any other questions and concerns that you may have. Have a great rest of your day.

Works great

Works great, thanks to the rep who helped me.

these do not fit into couplers as advertised and

these do not fit into couplers as advertised and pictured they com too short now

Thanks for sharing your review on our Drain Valve not fitting and being too short. Our Customer Care team is happy to discuss any product questions and concerns that you may have, and help to find a solution that works best for you. We can be reached by phone at (800)488-6156 or online at support.orbitonline.com for assistance. Have a great rest of your day.