Radiator connecting pipe made of semi-rigid nickel-plated d15mm copper with zeta value-optimised press-fit adapter tee made from dezincification resistant brass (DZR), incl. support sleeves with O-rings and stainless steel press-fit sleeves; "leak before pressed", audible leakage signal at air-pressure testing

ATTENTION: Follow the installation instructions of the screw fitting manufacturer and if necessary use support sleeves for copper connections!