Lazy-man option: give the plug a few wraps of plumbers (self-amalgamating) tape, this will increase the diameter to the point where it will seal until you get round to fixing it properly.
@Dammit started
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Lazy-man option: give the plug a few wraps of plumbers (self-amalgamating) tape, this will increase the diameter to the point where it will seal until you get round to fixing it properly.