Lightweight with strong grip. Suitable for fresh water plumbing systems and are easy to install. The secure connection indicator is there to ensure a leak-free joint. This is a highly visible green band that is seen when the product is unlocked. Upon connection, this green band disappears indicating that the joint is now properly connected. Simply push the fitting fully onto the pipe and twist the plastic nut clockwise to lock in place. No special tools are required, just hand-tighten them. Compatible with copper, PEX and PB pipes so they can be used for different plumbing scenarios, repair or new installations. Will not contaminate the water source, keeping water fit for human consumption. Push-Fit Plastic Fully Demountable & Reusable Secure Connection Indicator No Special Tools Required Will Not Contaminate Water Source Push-Fit Plastic Fully Demountable & Reusable Secure Connection Indicator No Special Tools Required Will Not Contaminate Water Source