AquaLock 3545-10 1/2 in. CTS Push-to-Connect Plastic End Stop Cap

The AquaLock 3545-10 is a 1/2-inch CTS (Copper Tube Size) push-to-connect plastic end stop cap designed to quickly and securely terminate water lines without any tools. Made from high-performance polysulfone thermoplastic, this end cap delivers a zero-leak, reliable seal for both hot and cold water plumbing applications.

Key Features:

• 1/2" CTS push-to-connect end stop cap — terminates water lines quickly and cleanly
• Tool-free installation — no tools or tube inserts required; simply push to connect
• Compatible with copper, CPVC, PEX (LDPE, MDPE, HDPE), and CTS-rated pipe
• Zero-leak patented O-ring guide ensures a watertight, drip-free connection
• Locking clip keeps the fitting securely in place under pressure
• Rotates under pressure for added installation flexibility
• Suitable for hot and cold water applications, including behind-the-wall installations
• Constructed from polysulfone — a durable, high-performance thermoplastic — for long service life
• Backed by a 25-year limited warranty

The AquaLock 3545-10 end stop cap is ideal for capping off unused ports or terminating plumbing lines in marine, RV, and residential applications. Its snap-in push-to-connect design makes it one of the fastest and most reliable ways to end a water line without soldering, clamps, or specialized tools.