The Apollo® Series 4D Defender™ backflow preventers are available in sizes ranging from 2-1/2 to 10 in. and feature a lead-free, all-stainless steel check valve design in a ductile iron body. The preventers perform to applicable ASSE and CSA standards and are UL listed and FM approved in sizes from 2-1/2 to 6 in.

- Conbraco Industries, Inc.
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