A plumber is connecting a new copper hot water tank to existing 19 mm Type M copper piping. Due to tight clearance, access for traditional soldering is restricted, and fire hazards are a concern. What alternative jointing method, suitable for potable water, could be safely and efficiently used?

Question: A plumber is connecting a new copper hot water tank to existing 19 mm Type M copper piping. Due to tight clearance, access for traditional soldering is restricted, and fire hazards are a concern. What alternative jointing method, suitable for potable water, could be safely and efficiently used?

Answer options:

• Flare connection with soft copper tubing
• Push-fit connection with compatible copper fittings
• Solder using a flame deflector shield ✅ Mechanical press-fit connection system

Correct answer: Mechanical press-fit connection system

Explanation: Mechanical press-fit systems for copper tubing provide a flame-free, watertight connection suitable for potable water and are ideal for tight spaces where open flame soldering is difficult or hazardous. Push-fit connections are also an option but may not be as robust or widely accepted in all jurisdictions for permanent installations as press-fit. Flare connections are common for gas lines but not typically mainline potable water, and while flame deflectors help, they don't eliminate the flame hazard entirely.