A 5-year riser inspection per NFPA 25 (2020) includes an internal pipe inspection, obstruction investigation, and a flow test. The scope involves opening a flushing connection and removing a sprinkler to check for foreign material; if any is found, a more thorough inspection and cleaning are required. Other components, such as valves, gauges, and the fire department connection (FDC), are also inspected, and a whole system flow test is performed for automatic standpipe systems. Internal Pipe and Obstruction Inspection • Initial Assessment: o Open a flushing connection at the end of a main line and remove a sprinkler from the end of a branch line to visually inspect the interior of the pipes for corrosion, scale, or debris. • Obstruction Investigation: o If any foreign material, such as corrosion, sludge, or other debris, is detected, a more thorough internal pipe inspection and obstruction investigation will be carried out.
