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.
This vents the radon from the fan to the roofline as dictated by EPA requirements. We have found that when PVC is exposed to the sun and elements, it often stains and yellows. Therefore, at our company, we use 4 inch by 3 inch white aluminum downspout to make the exhaust system as visually appealing as possible.