tecuro Brass compression fitting screw connection with cylindrical external thread. Design: thread 18 mm x 1/2 inch male thread. For drinking water tested and approved according to DVGW W 534. Universal use for plumbing, heating, oil and compressed air installation. In the field of solar – thanks to metallic seal suitable for high temperatures. Particularly proven in the repair area and in the renovation of old buildings. With hexagon, therefore no special tools required, adjustable spanners or standard open-end wrench is sufficient. Tensile resistant, corrosion-proof and permanently sealed. Pure metallic sealing. Suitable for flush-mounted installation. Can be used with the following types of pipes/types: copper pipes: DIN EN 1057; DVGW worksheet GW 392; RAL 641/1 precision steel tubes: DIN EN 10305-1 (DIN 2391). For illustrative purposes, several items can be seen in one photo