For some years there has been a waste bin on my property (there before I moved in) that is used as a water butt. The (rubber?) washer on the drainage hole cap has developed a split and it now leaks. Where can I get a replacement washer? The washer is about 2 inches across externally with a central hole about 1.5 inches across.
The bin is rectangular, 4 feet by 2 feet by about 3 feet deep - these are approximations, I can't find my tape measure to measure it accurately right now.
Thanks