LEAD FREE Series LFN9CD Watts Water （无铅系列LFN9CD 瓦水）.pdf

ES-LFN9-CD For Residential and Commercial Health Hazard Applications Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor –––––––––––––––––––––––––––––––––––––––––––– Job Location ––––––––––––––––––––––––––––––––––––––––– Approval ––––––––––––––––––––––––––––––––––––––––––––– Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––– Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative –––––––––––––––––––––––––––––––––––––––– LEAD FREE* Series LFN9-CD Field Testable Hose Connection Backflow Preventer 3 Size: ⁄ 4 (20mm) Hose thread The LFN9-CD is designed to prevent high hazard backsiphon- age backflow and low-head backpressure (10ft. or less) from contaminating the potable water supply. The LFN9-CD is ideally suited to prevent backflow associated with hose connections and may be screwed directly to the sill cock, yard hydrant or wall hydrant. Typical installations include service sinks, chemical dispensers, sill cocks and frost proof hydrants. Watts LFN9-CD features include two independently operating 3⁄4 (20mm) LFN9-CD rubber and stainless steel check valves with an atmospheric vent located between the check valves. In the event of fouling of the downstream check valve, leakage would be vented to Center Guided atmosphere, thereby, providing a visual indication of failure. The Checks integrity of the check valves can also be verified by performing the field test procedure included with the LFN9-CD. The LFN9- CD features Lead Free* construction to comply with