Plumbing Systems Inspection Flashcards

An inspector observes a double-tapped (two hoses connected to one fitting) washing machine supply hose connection at the valve. This is:

Answer: A deficiency; each supply connection requires its own dedicated valve

Each washing machine supply hose should connect to its own dedicated shutoff valve; sharing a single valve connection is improper and creates reliability issues.

What is the primary concern with a sump pump that discharges into the sanitary sewer system?

Answer: It introduces groundwater into the sewage system, which is prohibited in most jurisdictions

Discharging groundwater (clear water) into the sanitary sewer is prohibited in most areas because it overloads the sewage treatment system.

When inspecting a bathroom, the inspector finds no ventilation fan and no window. This is a concern because:

Answer: Moisture buildup can lead to mold growth and structural damage

Bathrooms without mechanical ventilation or an operable window are prone to moisture accumulation, which promotes mold, mildew, and deterioration of finishes and structure.

What condition is indicated when a toilet continues to run after the tank has fully refilled?

Answer: A faulty flapper or flush valve is allowing water to leak into the bowl

A continuously running toilet is most commonly caused by a worn or misaligned flapper that fails to seal the flush valve, allowing tank water to slowly drain into the bowl.

Which of the following materials is commonly used for drain, waste, and vent (DWV) piping in modern residential construction?

Answer: ABS or PVC plastic

ABS (acrylonitrile butadiene styrene) and PVC (polyvinyl chloride) are the most common materials used for DWV systems in modern residential construction.

An inspector notices that the cleanout plug on a main drain cleanout is missing. The significance of this finding is:

Answer: Sewer gases can enter the home and vermin can access the drain system

A missing cleanout plug allows sewer gases to escape into the structure and provides an entry point for insects and rodents into the drain system.

What does it mean when a home inspector reports 'evidence of prior repair' at a plumbing pipe?

Answer: There are visible signs of past leaks or patching that may indicate ongoing problems

Evidence of prior repair (tape, epoxy, clamps, or staining around a patch) suggests the area has experienced past failure and warrants closer evaluation for recurring issues.