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The McDonnell & Miller 339700 (Model SA21-38R) is a critical strainer basket assembly engineered for high-performance integration with Series 21 Make-Up Water Feeders
The most common symptoms include the furnace's induced draft motor running without a visible orange glow from the ignitor
moisture-resistant connection to field wiring
Its rugged brass construction and aerated design minimize linting and soot buildup
Industrial-Grade SPST Contacts: High-quality electrical terminals designed to handle inductive loads without premature pitting or failure
EWC Controls PRD 10" Pressure Regulating Damper Els PW 17895 The McDonnell & Miller 339700EWC Controls PRD 10" Pressure Regulating Damper Made in USA. Model PRD RD pressure regulating damper is a single blade, round variation of a barometric relief damper. This is the simplest, most economical way of bypassing excess static pressure in multi zone applications. Resistance is controlled by offsetting the arm and adjusting the weights. The arm can be inserted into either side of the damper for added versatility.
US$ 20.00
US$ 195.95
US$ 22.00