Coliter® supplies certified backflow preventers to protect public drinking water from contamination due to reverse flow. Our range includes the ZH6001 Reduced Pressure Zone (RPZ) backflow preventer—ideal for high-hazard applications like irrigation, fire systems, and industrial connections—and Double Check (DC) type valves for lower-risk residential and commercial use. Constructed from lead-free brass or ductile iron with epoxy coating, all models comply with GB/T 24684 and international backflow prevention standards. Rated at PN16 (1.6 MPa), with test cocks for annual inspection, they ensure reliable, fail-safe operation in municipal water networks, hospitals, and building supply lines—safeguarding health and meeting regulatory requirements worldwide.
