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Atlas Copco Zero Loss Electronic Drain (138 / 275 CFM)

Atlas Copco Air Compressors and Accessories
Model: EWD-50
(Based on expert analysis, manufacturer ratings and customer reviews)
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5
1 Review
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Electronically Controlled Condensate Drain
Safe, dependable condensate management

Intellegent Drain Function
Sensors monitor build-up & empties only when necessary
Avoids wasting compressed air for substantial energy savings

EWD 50 Suitable For Oil-Free Condensate Up To 232 PSI
Designed for compressors up to 138 CFM
Can be installed on dryers up to 275 CFM

Weighs Only 1.5 Pounds
Compact design is easy to install
Requires 115V power; can be hardwired into compressor or outlet

Minimal Maintenance
Non-wearing capacity sensors for longer drain life
Built-in auxiliary manual drain handles special situations
2 Pounds
Product Length
6.7 Inches
Product Width
2.8 Inches
Product Height
4.5 Inches
Consumer Warranty
1 Year
Commercial Warranty
1 Year
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  1 Question
Q: Hi Steve,

I just had Atlas Copco come and change out a failed drain valve. They installed the Atlas Copco EWD - 50. I think it is working but here is my question. The light is always green......I pushed the test button a few times to test it does nothing. What is the test button to do? How does the test button work?


by Gerald from California on July 11, 2016

A: Gerald

I'm looking through the manual and it's not addressing the test button so I need to refer you to Atlas. Here's the national number. If you can supply our order number we can get our local sales rep with Atlas to contact your directly.

Atlas Copco

by Jim, Product Expert
Atlas Copco EWD-50 Reviews & Ratings
1 Review  Sort by 
Thomas H.
Palo Alto, CA
Purchased from Air Compressors Direct
Purchased 8/10/15
5 out of 55 out of 55 out of 55 out of 55 out of 5
Failure Redeemed
Failure after 3 months. Air Compressors Direct has directed me to the Manufacturer for Warranty. This has turned out to be a run-around..

UPDATE (10/29/2015) - I recently received my auto Drain from Atlas Copco. Iíve installed it and it is working well. The Service representative that called me was polite and did everything he could to meet my satisfaction of the Warranty return. Some good advice, ask the representative of current failure problems. The problem might be in your Air... more
Thomas Recommends This Atlas Copco Product
Jim, the Air Compressor Expert
Product Expert
The Factory Warranty on all of the air compressors we sell is taken care of by the manufacturer. That being said, the folks at Atlas Copco should be taking care of any defects in material or workmanship that arise in the first year.

If you would please send the details of your situation to us at '' we will be happy to work with our Atlas Copco representative to get it resolved.
Manufacturer Response
Brand Rep

First I wanted to thank you for your feedback and apologize for your inconvenience. At Atlas Copco we value our customer's business and understand the importance of optimizing your process while keeping your downtime to a minimum. We want to ensure your satisfaction and will work with you to get this issue resolved in a timely manner.
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