Returned and swapped existing 50 gallon power vent water heater for another 50 gallon power vent water heater. Reconnected the existing gas, water, vent, and t&p line. Tested all work to ensure proper function and no leaks. Customer had water under cabinets in the kitchen. Opened the bottom cover for the dishwasher and found a leak on the diswasher. Recommended Reliable Restoration to inspect how much water is under the cabinets.