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