Rhode Island Journeyman Plumber Practice Exam

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What is required on a commercial sewage ejector?

Only a check valve
A ball valve
B+C--Ball Valve/Check Valve
Emergency shut-off

The correct answer is: B+C--Ball Valve/Check Valve

In a commercial sewage ejector system, it is essential to have both a ball valve and a check valve in place. The ball valve is important for allowing easy isolation of the system during maintenance or repairs, providing the ability to shut off the flow without having to drain the entire system. This feature is vital in maintaining operational efficiency and preventing unnecessary downtime during servicing. The check valve is crucial for ensuring that wastewater does not flow back into the ejector pit after it has been pumped out. By preventing backflow, the check valve helps maintain a hygienic environment and protects the pump from damage due to reverse flow, which can lead to malfunction or failure. Having both components together not only complies with typical plumbing codes and standards but also contributes to the overall reliability and effectiveness of the sewage ejector system in handling commercial waste. This combination ensures that the system is well-equipped to handle the demands of a commercial environment, where proper wastewater management is essential.