The Model F350 Sectional Test & Drain with an integral sight glass assembly, provides a simplified means for testing of waterflow alarm devices and draining of feed mains. It is typically utilized for connection to a common inside drain where it is not practical to terminate an inspector’s test connection outside of a building. The F350 has a smooth bore corrosion resistant test orifice equivalent to that of a 5.6K (80K) orifice sprinkler, and it is provided with 1-1/4 inch NPT pipe size connections that make it suitable for use as a sectional drain connection with up to a 3-1/2 inch (DN80) size feed main.