https://www.resideo.com/gb/en/products/water/backflow-preventers-check-valves/check-valves/rv280-1a-standard-version-with-1-in-port-diameter-17-kvs-rv280-1a/
RV280-1A - Standard version with 1" in port diameter, 17 Kvs | Resideo
Standard version with 1" in port diameter, 17 Kvs - RV280-1A : discover all the product's technical features and functionalities.
standard version