Placing Drainpipe
To the Editor:
With regard to the question
"Orienting a Foundation Drain" (On
the House, 7/94), I would like to add a
couple of items: Locating the holes in
the drain in the 4 o'clock/8 o'clock
position is done not only to allow
groundwater to rise into the drain and
be quickly disposed of, but also to minimize
the chance that fines filtering into
the drain system from above will enter
the drain and possibly block it over
time. In fact, drains installed with too
much slope can actually pull sand and
other fines into the system.
Mr. Marsh's reminder that the stone
is part of the drainage system is a point
well taken. Taking a