Whether you are buying a home, preparing to sell, or simply want to understand the actual condition of the systems keeping your household running, a professional plumbing and HVAC inspection gives you a clear picture that a surface-level walkthrough never will. Most homeowners have a general sense of how their systems are performing based on whether the heat comes on and whether the water pressure feels normal. A professional inspection goes considerably deeper than that, and what it reveals is often information that changes how a homeowner prioritizes maintenance and repair decisions going forward.
What a Professional Plumbing Inspection Covers
A thorough plumbing inspection begins with the water supply system. A licensed plumber checks the condition and material of the visible supply lines throughout the home, looking for signs of corrosion, leaking connections, improper repairs, and inadequate pipe sizing. In older New Hampshire homes this assessment carries particular weight because galvanized steel supply lines, which were standard in mid-century construction, corrode from the inside out and are often well past their reliable service life by the time a homeowner thinks to ask about them.
Water pressure is tested at multiple points throughout the home. Pressure that is too low suggests blockage, pipe deterioration, or a supply line issue. Pressure that is too high puts stress on fixtures, appliance connections, and pipe joints throughout the house and is a leading contributor to premature water heater failure and pinhole leaks.
The drain and waste system is inspected for slow drainage, signs of leaking at drain connections, and evidence of prior repairs that may not have been done correctly. For homes with accessible crawl spaces or basements, the inspector evaluates the visible drain lines for sags, improper slope, and corrosion. A HVAC inspection in Derry NH can extend this assessment to the underground portion of the drain system, revealing root intrusion, cracked sections, and deteriorating pipe that would otherwise remain invisible until a backup forces the issue.
Water heating equipment is evaluated for age, condition, signs of corrosion, and proper installation. The pressure relief valve is tested, the anode rod condition is assessed, and the venting on gas units is checked for proper configuration and integrity. Shut-off valves at individual fixtures and at the main supply are operated to confirm they function correctly, which matters considerably when a fixture develops a problem and the valve needs to actually close.
What a Professional HVAC Inspection Covers
The heating side of a combined inspection covers the furnace or boiler in detail. A technician inspects the heat exchanger for cracks, cleans the burners, checks the igniter and flame sensor, measures gas pressure, tests the safety switches and limit controls, and confirms that the flue and venting are intact and properly connected. Carbon monoxide testing is part of a thorough heating inspection, and it is not a step to skip in any home with gas appliances.
For homes with central air conditioning or a heat pump, the cooling system inspection includes checking the refrigerant charge, inspecting the coils for cleanliness and damage, testing the capacitors and contactors, evaluating the condition of the blower motor, and confirming that the condensate drainage system is clear and draining properly. Airflow through the supply and return system is assessed, and the thermostat is tested for accurate calibration and proper communication with the equipment.
Ductwork condition is an important part of any HVAC inspection in Southern New Hampshire, particularly in older homes where duct systems have had decades to develop leaks at joints and connections. Leaky ducts can account for a significant percentage of energy loss in a forced-air system and are a common reason why homes feel inconsistently heated or cooled despite equipment that appears to be functioning normally.
Why a Combined Inspection Makes Sense
Plumbing and HVAC systems in a home interact more than most homeowners realize. Water heaters, boilers, hydronic heating systems, humidifiers connected to HVAC equipment, and condensate drain lines from cooling systems all sit at the intersection of the two trades. Having both systems evaluated together by a company that handles both gives you a complete picture rather than two separate assessments that may miss how one system is affecting the other.
The team at daigleplumbing performs comprehensive plumbing and HVAC inspections throughout Derry, Manchester, Nashua, Londonderry, Salem, and all of Southern New Hampshire. Call Daigle Plumbing Heating & Cooling at 603-434-6353 or visit daigleplumbing to schedule your home inspection.