Description
The Mepco (Dunham Bush) D4664 is a 3/4″ 2E-SW Straight Way Steam Trap engineered for dependable condensate drainage and air venting in commercial and industrial steam distribution systems. Mepco’s 2E-SW series is a trusted solution for maintaining system efficiency by continuously discharging condensate while retaining live steam, reducing energy waste and protecting downstream equipment.
Product Overview
The straight-way (SW) configuration allows in-line installation with the same inlet and outlet pipe alignment, simplifying retrofits and new installations in tight mechanical spaces. The 3/4″ connection size makes it well suited for a wide range of low- to medium-pressure steam and hydronic heating applications.
Key Features
- 3/4″ straight-way (in-line) connection configuration
- 2E-SW series design for reliable condensate removal
- Retains live steam while efficiently discharging condensate
- Suitable for commercial and industrial steam distribution systems
- Compact, in-line body for easy installation and maintenance
- Manufactured by Mepco (Dunham Bush), a recognized leader in steam specialty products
Applications
- Steam distribution and condensate return lines
- Hydronic and steam heating systems
- Commercial HVAC steam coil drainage
- Industrial process steam applications
Specifications
- SKU: D4664
- Brand: Mepco (Dunham Bush)
- Connection Size: 3/4″
- Series: 2E-SW
- Body Style: Straight Way (In-Line)







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