The lower weep hole exists to allow fluid to collect or drain out of the water pump to protect the bearing integrity. In a horizontal centrifugal pump there is little space between the bearing and the seal so fluid build-up could potentially threaten the bearing.
Definition of PETRI DISH. 1. : a small shallow dish of thin glass or plastic with a loose cover used especially for cultures in bacteriology.2. ADVERTISEMENT.Julius R. Petri â 1921 German bacteriologist.. : a small shallow dish of thin glass or plastic with a loose cover used especially for cultures in bacteriology. 2. ADVERTISEMENT. Julius R. Petri â 1921 German bacteriologist.
1 Make sure to label each petri dish with the source of the bacteria it contains, otherwise you won't be able to tell which is which. 2  You can do this using some tape and a marker. 3  As an extra precaution, you can place each petri dish in a zipper-lock bag.