What should be used to pipette wastewater or chemicals safely?

Using a rubber bulb to pipette wastewater or chemicals is a safe method because it allows for controlled transfer of liquids without direct mouth suction, which can pose health risks. The rubber bulb creates a vacuum when squeezed and released, drawing liquid into the pipette, making it easier to handle hazardous materials safely.

Additionally, this method significantly reduces the chance of chemical exposure or splashing, protecting both the user and the environment. Unlike a syringe, which can be more difficult to control with viscous or volatile liquids, or a glass pipette that runs the risk of breaking and causing injury or contamination, the rubber bulb provides a reliable and simple way to accurately measure and transfer liquids. Using a funnel is generally for pouring liquids rather than pipetting, which highlights the appropriateness of the rubber bulb in this context.