unvented cylinder fixing leak water inlet

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    do i need to drain unvented water cylinder to fix water inlet pipe of toilet

    Hello, Need some expert advice... I have a leak on a water inlet pipe of a toilet which looks straight forward to fix. However, I have a unvented water cylinder system (i think that’s what they are called - It has a big tank and a small tank). It’s a small flat where the hot water cylinder...
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