I've got a leak in kitchen drain. House is on slab. No water inside...tore out sheetrock to check. Leak is apparent out side on 4 foot brick outer layer about 4 inches below the siding.... Took two bricks out at leaking spot....got to concrete blocks. They are holding up foundation...don't want to cause myself a major expense...On back corner of house....lots of stress on that spot...anybody know where i can find pvc pipe liner or anything else that may work...after thinking work smarter not harder...guess taking sink out would be a much better option....read a little on liners...just need a fix....any help would be appreciated...