European 2 inch Flush Valve Flush Pipe Nut & Seal - 08000369/002
Fixaloo 50mm Flush Pipe Nut & Ring (Card) 208149
Cistern Flush Pipe Coupling Rubber Conical Washer Seal
Fix A Tap on X: "Fix your toilet with one of our FIX-A-LOO repair parts. The range includes flush pipe cones & seals, cistern buttons, pan screws, flush pipe & inlet valve
plumbing - Replace valve/washer/nut/seal for toilet cistern water inlet leaking where nut meets porcelain? - Home Improvement Stack Exchange
High Level Cistern Flush Pipe Nut and Cone Washer - 08001357
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Nut for flush pipe, manhattan | 8050882224
How to fix a leak on a W C flush pipe, pan end or the cistern end