Stool Culture. Test Overview. A stool culture is a test on a stool sample to find germs (such as bacteria or a fungus) that can cause an infection. A sample of stool is added to a substance that promotes the growth of germs. If no germs grow, the culture is negative. If germs that can cause infection grow, the culture is positive.
color and is used for irrigation, water handling and other relatively low pressure jobs. Schedule 80 PVC is. usually dark gray in color (though it can come in other colors) and is primarily used in more heavyâduty. applications like industrial and institutional settings.
The black pipes you see under your sink and in the basement are made with a plastic called acrylonitrile butadiene styrene, or ABS. Plumbers use them exclusively for drain waste vent systems. Their advantage over PVC in this regard is their superior flexibility and resistance to extreme temperatures. Waste lines aren't pressurized, so when a length of ABS pipe leaks, it's usually either because a joint wasn't glued properly or the pipe is under external stress.