Kitchen renovation plumbing guide.
Plan plumbing first or simultaneously with kitchen design.
Moving a sink adds $500-$2,000 in relocation costs.
Essential requirements: sink needs hot and cold supply with 40-50mm waste, dishwasher needs water supply and waste connection, gas cooktop needs licensed gasfitter, fridge water line needs 10mm supply.
Common mistakes: no isolation valves, missing dishwasher air gap, inadequate waste pipe fall, flexible hoses in inaccessible locations, not upgrading old galvanised pipes.
Total plumbing cost $2,000-$5,000 representing 15-20 percent of renovation budget..