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This is a mezzanine floor; the internal patio drain is blocked, and the downpipe is poorly constructed. We believe the entire installation needs changing. Every time it rains, we get flooded. This is a community work, and we need a quote for the community president. It's an old backpack cistern; the flat is from the 60s. Two years ago, I replaced the flush valve with a new one (the blue and white plastic type). Now it's leaking into the bowl, and the tank seems to never stop filling. The stopcock is next to the tank. The float mechanism works perfectly. The water outlet never stops; it constantly keeps running, and we had to close the stopcock to avoid waste.
