I have already explored the suggestion you posted. To fix the crack in the
drain pipe that is currently located about 12 inches beyond the 8" thick
monolithic slab will require opening a hole on the kitchen side, ripping out
the kitchen cabinets for access, and ripping out tiles that has no
replacement. There is no access from the garage side because there is a
intermediate concrete footing that runs along the separation wall between
the kitchen and garage. Alternative 2 is to have someone dig a tunnel 6
feet long from the side under the house to fix it, either way the cost is
extremely high and has other side impact that may exceed the inconvenience
of the original problem. The soil is sandy. When the washer discharges the
water pull sand through the crack and pile sand downstream in the main line
which causes occasionally blockage. Right now my remedy is to pay $1000 a
year to clear that blockage by reverse jet sweeping.

"John B" wrote in message ...
Thank you for the reply.
I'm still not interested in deciphering those plumbing scenarios you
painted.
Why don' t you just get a professional to unblock the existing drain line,
if you can't do it yourself? In the garage, this should be easy. I had
unplug the washer drain pipe in my in-house washroom once, and that was a
mess. It flooded repeatedly.
"orangetrader" wrote
I am trying to drain the washer discharge to the kitchen sink drain
because the drain line in the garage is "blocked".