My toilet cistern has a black box inside hiding all the components. How do I sort out the problem I have with my toilet constantly running/emptying?
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Reply to the thread, titled "Hello from a DIYer in Shropshire" which is posted in DIY Plumbing Advice on Plumbers Forums.
We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.