Customer had stoppage affecting drainage of kitchen sink. Removed ptrap and ran small snake 15’ to clear line. Filled sink to drain test line but noticed water coming out of topside hole in pipe behind escutcheon while draining sink. Leak only appears when large volume of water is drained. Showed customer and explained conditions. Customer wants to wait to address issues. Not responsible for any further issues involved with drain line leak. Line drains properly aside from hole in line.