While you wait for answers, we may have found some information which could help you.
Success
Message
my toilet wont flush?
macdee dve 0600?
cistern constantly fills and runs into toilet pan?
Macdee cistern inlet valve?
leaking cistern?
how do I adjust a dve 0600?
Macdee Metro 3 Part Toilet Syphon?
How do we change the flush from 1/2 to a full flush?
where can I get spares for a Derwent Macdee 9.5 inch round syphon ?
Derwent Macdee metro syphon repair?
I need new bellows for my macdee pneu-compact 6 litre cistern?
Toilet seat?