Coliter ® RPZ Backflow Preventer, 1.6MPa, -20–120°C, Lead-Free Brass, BSP Threaded
ZH6001 RPZ Backflow Preventer – Reduced Pressure Zone Assembly for High-Hazard Backflow Protection
The Coliter® ZH6001 RPZ Backflow Preventer is a certified Reduced Pressure Zone (RPZ) backflow prevention assembly designed to provide the highest level of protection against both backpressure and backsiphonage in high-hazard applications. Constructed from lead-free brass, it is suitable for use in potable water systems connected to irrigation, fire suppression, industrial processes, or any installation where contaminants could pose a serious health risk. Rated for a nominal pressure of 1.6 MPa, it operates within a temperature range of -20°C to 120°C and complies with GB/T 24684 and international backflow prevention standards. The unit features two independent check valves separated by a hydraulically monitored reduced-pressure zone, with an automatic relief valve that discharges to atmosphere if either check fails. Equipped with standard test cocks for annual inspection and ISO 228 (BSP parallel) threads, available in sizes DN15 (G1/2") through DN50 (G2"). Essential for safeguarding public water supplies in hospitals, chemical plants, and municipal infrastructure.
Installation diagram
Product Description
| DN | G | L |
| 15 | 1/2" | 154 |
| 20 | 3/4" | 150 |
| 25 | 1" | 166 |
| 32 | 1¼ | 200 |
| 40 | 1½ | 210 |
| 50 | 2" | 220 |
Technical Specifications
Nominal Pressure: 1.6 MPa
Working Medium: Water、Non-corrosive Liquid
Working Temperature: -20℃ ≤ t ≤ 120℃
Pipe Threads: ISO 228
Product Inquiry
We will contact you within one working day. Please pay attention to your email.
Faq - Frequent questions
Introduction to Backflow Preventer
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.
