Cold Water Flashcards
How do you ensure a water system is sound?
Inspect visually, test for leaks, flush debris, and disinfect chemically.
How do you test rigid pipes (copper/steel)?
Fill with water, stabilize, pump to 1.5x pressure, check for drops, and re-test if needed.
How do you protect plastic pipes during testing?
Follow manufacturer guidelines and avoid over-pressurizing.
Why flush and disinfect a system?
To remove debris and ensure safe, clean water.
What disinfectants are used?
Sodium hypochlorite or chlorine, per BS6700 standards.
What tests are done during commissioning?
Flow rates, pressure, and FOV levels in cisterns and toilets.
How does commissioning prevent issues?
Stops stagnation, bacterial growth, and noise.
What is given to the customer?
Documentation and operation instructions
What is temporary vs. permanent decommissioning?
Temporary: Isolated for repairs; Permanent: Removed or capped.
What steps are taken during decommissioning?
Inform others, cap pipes, drain water, and label valves.
What are dead legs?
Passive: Stagnant pipes; Active: Long hot water pipes wasting water.
How do you drain systems?
Localized, part, or full draining depending on the need.
Why drain from the lowest point?
Ensures complete drainage with minimal waste.
What does a drain-off valve (DOV) do?
Safely releases water from the system.
