Red Seal Plumbing Practice Exam

What is required when installing a deep well jet pump?

1. Pressure switch

2. Foot valve on the jet suction line

3. Check valve on discharge line

4. Gate valve on suction line

The correct answer is: Foot valve on the jet suction line

Deep well jet pumps require a foot valve on the jet suction line to work properly. Foot valves are one-way valves that allow water to flow into the pump, but not back out. This is important because it maintains the prime of the pump (the water needed to start pumping) and prevents air from entering the system, which can cause the pump to lose its prime. Option A (pressure switch) is not required for installation, as it is used to regulate the pump's on/off cycles. Option C (check valve on discharge line) is also not required, but can be beneficial in preventing backflow and maintaining pressure in the system. Option D (gate valve on suction line) is not required and can actually hinder the pump's performance by restricting water flow.