On Sun, 30 Nov 2008 20:14:06 -0800 (PST), sherry
wrote:

Someone suggested using an automobile flex hose held on with clamps
instead of the standard rigid PVC U-trap. This is for the drain pipe
under the laundry sink. Will this work? We can't use the washer
until have an answer and a reason why it would/wouldn't work. Thanks
for any reply.
I've got a moulded flexible hose trap on one of my sinks and it
works. It isn't automotive - it was made for the job, but if you could
hold the flex in the right shape to provide a functional trap, it
would work..

BIG if though.