APPARATUS FOR CLOSING MOUNTING TUBES WATERTIGHTLY
The invention relates to an apparatus for closing mounting and casing tubes watertightly in buildings where water and/or heating lines (2) are mounted inside mounting and casing tubes (5) and where connection pieces (4), which are placed inside connection boxes (1), are used for connecting e.g. water fixtures to water lines. The connection box (1) contains a through opening (3) leading to at least one jointing element (6), by means of which a watertight jointing of the mounting and casing tube (5) can be accomplished. The connection box (1) is provided with a continuous circumferential shoulder (9) on the inside thereof for a washer (10) and the connection piece (4) is provided with a continuous circumferential flange (7). In the assembled form of the apparatus, said flange (7) is arranged to position against said shoulder (9) and the washer (10) therebetween is fitted to press against said elements and close the connection box (1) watertightly.