Pre-Move-In Plumbing Guide

Older homes share predictable plumbing challenges that appear regardless of age. Typical issues include:

• Pinhole leaks in copper pipes and internal corrosion in galvanized pipes.
• Slow or clogged drains caused by buildup inside older plumbing lines.
• Worn or stuck valves that no longer work safely.
• Leaky traps and joints under sinks, vanities, and shower connections.
• Gas pipes may leak, posing a significant safety hazard and inspection fail
• Failing waterproofing, such as cracked grout or missing silicone around wet areas.


A few simple checks can prevent most common plumbing failures. Before settling in:

•Run all faucets and drains at full power to test for slow flow, leaks, or noises.
•Replace all supply hoses (toilets, faucets, dishwasher, fridge, laundry) with braided stainless steel.
•Inspect every cabinet, especially under sinks, for moisture stains, swelling, or soft wood.
•Re-seal tubs, showers, and sinks with fresh silicone to prevent hidden water intrusion.
•Contact a professional gas company to conduct a gas pressure test. If a leak is detected, it must be addressed before the walls are painted.

Licensed plumber should verify system integrity before you occupy the home. Key tasks include:

•Whole-house water and gas pressure testing to identify hidden leaks or weak points in the system.
•Inspection of exposed piping, looking for corrosion, aging joints, or incompatible materials.
•Evaluation of drain lines for early deterioration, partial blockages, or past repairs.
•Full water heater assessment, including age, sediment buildup, venting, and signs of corrosion.


Focus on replacing aging hoses and valves, confirming leak-free drains, refreshing waterproofing, and ensuring the water heater and pipes are in good condition. A brief pre-move-in visit from a plumber costs far less than repairing hidden water damage later. By addressing plumbing first, you create a safe, dry, and reliable foundation before making any cosmetic upgrades to your new home.