The Limits of a General Home Inspection
During a real estate purchase, a general home inspector checks hundreds of items across the roof, electrical panel, HVAC, and cosmetics. When evaluating plumbing, their scope is typically limited to verifying that faucets flow and toilets flush.
General inspectors do not insert fiber-optic cameras into underground sewer laterals, test static line water pressure with calibrated gauges, or inspect the interior of water heater tanks. A hidden sewer line collapse or deteriorating galvanized supply piping can easily cost $7,000 to $15,000+ to remediate immediately after closing.
When to Book the Inspection During the Option Period
In Texas, buyers typically negotiate a 7 to 10-day option period. It is critical to schedule your specialized plumbing inspection within the first 3 to 4 days of that window. This ensures you receive the detailed digital findings and itemized repair estimates in time to negotiate seller repair concessions, escrow credits, or price adjustments before the option expires.
What a Comprehensive Plumbing Inspection Must Cover
A thorough licensed inspection should deliver verified findings across four major areas:
- Static Line Pressure Test: Verifying incoming municipal water pressure is between 45 and 65 PSI (pressures above 80 PSI blow out appliance valves).
- HD Sewer Lateral Camera Scope: Inspecting from the exterior cleanout all the way to the city main to verify pipe slope, joint integrity, and absence of root intrusion.
- Water Heater Safety Audit: Checking temperature and pressure relief (T&P) valves, thermal expansion tanks, flue draft, and remaining service life.
- Supply Line Material Verification: Confirming the absence of recalled polybutylene piping or heavily corroded galvanized iron pipes.