<p>Cistern comprises a cistern body (1) containing a filler valve (2) which can be locked in position by a crosshead (4) detachedly arranged in the cistern body. Preferred Features: The filler valve is fixed to an adapter (3) which is held by a holder. The crosshead locks the adapter in position. A locking bracket (40) is provided on the crosshead for locking purposes. The crosshead and locking bracket are made from plastic.</p>
