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Siamp Optima 50 Dual Flush Valve with Cable and 1 1/2" & 2" outlets can be installed into a plastic or ceramic cistern and is compatible with a duel flush button. It features a 2 part design which allows easy servicing without having to remove the cistern. The overflow can be cut increments of 4mm, and its flush is adjustable. It also comes with a foam pan seal that compensates for any pan irregularity. The stirrup fixes the cistern lid, once the button is screwed down and enables a non-alignment position.
