We want to relocate our washer/dryer about 10 ft from its original location. We have a slab floor, so re-routing the drain would mean digging a trench in the slab floor to run the new drain pipe.

My concern is the cutting up the slab floor part - all the plumbers I've talked to have no issue with it, but I'm concerned for my foundation. Would cutting into the slab affect the foundation? The house is ~ 35-40 yrs old - and so far the foundation & slab are in great condition.

Any suggestions to allay my fears would be welcome.