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It's a mezzanine floor, the internal patio drain is blocked, and the downpipe is poorly constructed. We believe the entire installation needs replacing. It floods every time it rains. This is a communal work, and we need a quote for the community president. It's an old concealed cistern; the flat is from the 1960s. Two years ago, I replaced the flush valve with a new one (the blue and white plastic type). Now it leaks into the bowl, and the tank seems to never stop filling. The stopcock is next to the tank. In any case, I've bought a replacement rubber flapper (rubber/plastic flapper with rod and nuts), but given the difficult access, I'd like a professional familiar with this type of work to install it. That's why I'd like to request a quote.
