TDM Brass 1475E Double Demountable Elbow 18mm x 1/2" Male Thread

The TDM Brass 1475E Double Demountable Elbow is a professional-grade plumbing component engineered for reliable and secure pipe connections. This fitting features an 18mm compression connection on one side and a 1/2 inch male threaded connection on the other, making it an essential part for transitioning between pipe sizes or connecting pipes to threaded valves and equipment. Constructed from high-quality brass, it offers excellent resistance to corrosion and mechanical stress, ensuring long-term durability in both residential and commercial plumbing and heating systems.

Advantages

The primary benefit of this double demountable elbow is its versatile design, which allows for quick and efficient installation without the need for specialized soldering tools. The compression fitting mechanism provides a tight, leak-proof seal that can be easily tightened or adjusted as needed. Because the unit is demountable, it simplifies future maintenance and system modifications, as the fitting can be disassembled and reassembled without damaging the pipework. Its robust brass construction ensures structural integrity under varying pressure and temperature conditions common in modern water distribution networks.

Suitable for

• Connecting 18mm copper or plastic pipes to threaded components
• Plumbing installations in residential and commercial buildings
• Heating system pipework and radiator connections
• Maintenance and repair of existing water supply lines

When it may not be suitable

This fitting is not designed for use in high-pressure industrial steam systems or environments where the fluid temperature exceeds the standard rating for brass compression fittings. It is also not compatible with pipe materials that require specific crimping tools or specialized welding techniques.

Key specifications

• Connection type: 18mm compression to 1/2 inch male thread
• Material: High-quality brass
• Design: Double demountable elbow
• Application: Plumbing and heating systems

How to use

To install the fitting, ensure the pipe end is cut square and is free from burrs or debris. Slide the compression nut and the olive onto the pipe. Insert the pipe fully into the elbow body until it seats against the internal stop. Tighten the compression nut onto the fitting body by hand, then use a wrench to tighten it further until a secure, leak-proof connection is achieved. For the threaded side, apply appropriate thread sealant or PTFE tape to the male threads before screwing it into the corresponding female port.

What to consider before purchase

• Verify the outer diameter of your existing pipework is exactly 18mm
• Ensure the threaded port has a standard 1/2 inch female connection
• Check local building regulations regarding the use of compression fittings in concealed areas
• Confirm the compatibility of the brass material with your specific fluid type

Usage recommendations

Regularly inspect the connection for signs of moisture or weeping after the initial installation. Do not overtighten the compression nut, as this may deform the olive and compromise the seal.