What is the correct procedure for pressure testing all system hoses?

Prepare for the TFM-04 Fire Extinguisher License – A with comprehensive flashcards and multiple choice questions. Each question offers hints and explanations. Get ready for your exam!

Testing hose integrity under pressure using a water-filled method is designed to reveal leaks that may not show up with air alone. Filling with water for one minute ensures the hose is fully charged and any weakness will leak under pressure. Then applying pressure checks the entire length for leaks rather than just visually inspecting. Drying the hose at a temperature no higher than 150°F protects the hose material and bonding from heat damage and prevents moisture-related issues before putting it back into service. If it passes, it’s safe to return to service; if it fails, destroying the hose prevents a dangerous failure in operation. Visual inspection alone or tests that use air, submersion in coolant, or no pressure test cannot reliably confirm the hose’s integrity under actual operating conditions.