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Derek Broughton wrote: wrote: Don't install bottom drains. Why? 2 main reasons: 1. You have to cut a hole in the bottom of the rubber liner to fit the drain pipe. No matter how well you plan this and use the top of the line sealants, it will leak. Maybe not in the first 2-3 years, but no matter the claims of sealants, they expand and shrink as the temperature changes and do not change exactly at the same rate as the rubber liner. Over time this connection fails. Do you have _any_ evidence to back this up? Consider that the average toilet seal, generally a much weaker seal than a good gasket in the bottom of a pond, can last thirty years... If you are referring to the wax ring on the toilet base, that is a static gravity seal and not subject to constant pressure. There is nothing more aggravating that to drain your pond for spring or fall cleanout and find that a leaking bottom drain has saturated the earth with water. That water then causes the rubber liner to have huge pockets of trapped water that bubble up the liner and cannot be fixed without pulling the entire liner out and pumping the water out of the hole and resealing the drain and fitting the liner again. DO NOT USE BOTTOM DRAINS WITH LINERS |
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