Recently removed a wet bar and wanted to get some advice. The house was built in 1978 and is a four level split. I removed the wet bar which is located on the lower level slab of the split. The supply lines and drain are approximately 6ft into the slab from the basement block. The supply line comes up through the slab, fed the old wet bar and splits, then returns back down through the slab to feed the bathroom and utility room water supply. My question is, what is the safest and easiest way to remove the lines above the slab and reattach the supply line? Chisel out concrete/slab around the lines, cut and reattach below the slab and replace concrete? I've attached some photos for reference. Thank you for your input!