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The 
McAlpine R23U
 is a ¾-inch overflow pipe blanking cap designed to securely seal off unused overflow outlets in plumbing systems. It provides a reliable, leak-proof, and maintenance-free solution for both professionals and DIY enthusiasts. 
Key Features and Specifications
Product Type: Overflow Pipe Blank Cap.
Pipe Size: Designed to fit standard ¾ inch (19.05 mm) overflow pipes.
Connection Type: Universal compression connection, compatible with most standard plumbing systems.
Material: Constructed from durable, resilient plastic (polypropylene) that is resistant to corrosion and chemical damage.
Installation: Features a quick, secure, and tool-free installation method.
Colour and Design: White finish, with a compact and discreet design.
Function: Intended for blanking or capping off an overflow pipe to prevent water leakage and maintain system integrity. 
 
Applications
The R23U blanking cap is suitable for various applications where an overflow outlet needs to be permanently or temporarily sealed: 
Sealing off unused overflow ports in sinks and basins.
Blanking excess plumbing connections. 
 
Installation Guide (General Steps)
Installation is designed to be simple and generally does not require tools. 
Preparation: Ensure the surface around the overflow hole or the end of the pipe is clean and free from debris.
Sealant (Optional but recommended): Apply a small amount of plumber's putty or silicone sealant to the underside of the cap for an extra-tight seal.
Placement: Place the cap over the overflow hole or pipe end and press down firmly.
Securing: Tighten the universal compression nut (if applicable) by hand until a secure seal is made.
Finishing: Wipe away any excess sealant and allow it to dry completely before testing the system.