Flexible Drains can be a nightmare

I usually call these out when I do a home inspection. A flexible drain pipe for a sink is a bendable, expandable plumbing component used under kitchen or bathroom sinks to connect the sink's tailpipe to the wall drain or trap arm. These can sag, kink or leak. They clog faster since the ridges trap hair, debris and food. In some plumbing codes they are not even allowed.

Ridges in corrugated (accordion-style) pipes trap hair, soap scum, food particles, and grease, slowing water flow. Smooth-walled flex pipes are better but can still accumulate buildup. This can lead to mold and bacteria growth. I’ve seen some nasty clogs.

Loose slip-joint nuts from vibration, poor sealing washers, or material softening from hot water/chemicals. Over-tightening can crack fittings.

Flexible material lacks rigidity, causing the pipe to hang and create air pockets or improper slope (water needs 1/4-inch drop per foot toward the wall).

Sharp bends or pressure from cabinets/tools pinch the pipe, restricting flow. Low-quality plastic becomes brittle over time.

Trap water evaporates (e.g., in rarely used sinks), dry P-trap, or cracks allowing gas bypass. It stinks.

Some corrugated flex pipes violate plumbing codes (e.g., IPC/UPC) due to clog risk or poor flow. They wear faster in high-use areas.

Not suited for sinks you use a lot.

Vince

www.Austinpropertydoctors.com