Comap transitional fitting Tectite Classic GW 18–3/4 (T270G1834)

The Comap transitional fitting Tectite Classic GW 18–3/4 (T270G1834) is a push-fit style adapter designed to provide a secure mechanical transition between a GW 18 connection and a 3/4 threaded interface. Built for plumbing applications, this Tectite Classic component is intended for potable water and heating systems where a reliable, tool-free connection between dissimilar pipe or thread types is required. The fitting simplifies changes in connection style while maintaining a compact profile suitable for tight installation spaces.

Advantages

The fitting offers a push-fit connection that enables fast, tool-free assembly and reduces installation time. Its design ensures a stable mechanical joint that can accommodate standard GW 18 pipe and a 3/4 threaded connection without additional adapters. The Tectite Classic construction is compatible with potable water and heating systems and is made to provide leak-resistant performance when installed according to manufacturer guidance.

Suitable for

• Connecting GW 18 pipes to 3/4 threaded fittings in plumbing systems
• Transitions between press-fit or push-fit plastic/metal pipework and threaded valves or appliances
• Potable water distribution and domestic heating installations

Key specifications

• Connection type: push-fit to threaded connection
• Input connection size: GW 18 push-fit
• Output connection size: 3/4" threaded
• Intended media: potable water and heating fluids
• Application: plumbing and heating system transitions

How to use

Ensure both pipe and threaded connection are clean, deburred and free from damage before assembly. For the push-fit GW 18 side, fully insert the pipe into the fitting until it seats against the internal stop; confirm retention by a light pull. For the 3/4 threaded side, apply appropriate thread sealant or PTFE tape if required by local practice, then hand-start and tighten to the required engagement using appropriate tools without over-torquing. Follow any additional installation guidelines from the system or component manufacturer to ensure correct sealing and mechanical stability.

Usage recommendations

Use the fitting within the operating pressure and temperature limits of the overall plumbing or heating system and verify compatibility with pipe material. When used in potable water systems, follow local regulations for potable-water fittings and flushing procedures after installation. Regularly inspect joints after commissioning and after initial thermal cycles to confirm leak-free performance.