That's just what I was thinking - it's above the WC in the dry/vent part of the stack. I googled Armaflex outdoor lagging and on the first page found a site where it could be got and even accept PayPal The hemp grommet is used behind a modern strap on boss with silicone to take up the gap against the iron soil pipe. Maybe there is a you tube video showing how it's made. There is in fact a diagram under " how to make a rope strop block" (hello sailor) and it's like that but the strand is longer and goes right round the circle you are forming.How can that leak "every time the toilet is flushed"?
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