Click to expand Tap to zoom Alpex-plus transiton coupling flat-sealing 20 1/2 FT Female Thread by FRANKISCHE SKU 87320672 Flat-sealing adapter made of dezincification-resistant brass to create detachable connections ion drinking water and heating systems Featuring fixed stainless steel sleeve and optical indicator for verifying correct positioning. The connection can be released during installation in the dimensions of 16 to 20 mm by means of special tools. Accessories