Tech located 3/4" hot water line the burst in the slab. Tech had to removed a section of the Bottom of the vanity cabinet to access the main hot water manifold. The pipe affected was rolling underground from the water heater to the back to back bathroom vanity. This pipe supplies hot water to both bathrooms. The only hot water still active is the kitchen sink. Tech is recommending doing a reroute over head instead of repairing it through the floor.