What is the minimum required intake pressure for an apparatus being resupplied?

What is the minimum required intake pressure for an apparatus being resupplied?

• A. 20 PSI
• B. 10 PSI
• C. 30 PSI
• D. 40 PSI

Answer: (A)

Maintaining a minimum intake pressure keeps the pump primed and able to draw water from the resupply source without pulling in air. When an apparatus is being resupplied from a Mobile Water Supply, a positive, steady intake pressure around 20 psi ensures the water column remains established through the pump and allows the engine to overcome line losses as it takes in water. If intake pressure drops too low, the pump can lose prime, air pockets form, and flow becomes inconsistent. Pressures higher than this minimum aren’t required for the clean, reliable draw from the supply and can complicate coordination with the source. So the required minimum intake pressure is 20 psi.

Maintaining a minimum intake pressure keeps the pump primed and able to draw water from the resupply source without pulling in air. When an apparatus is being resupplied from a Mobile Water Supply, a positive, steady intake pressure around 20 psi ensures the water column remains established through the pump and allows the engine to overcome line losses as it takes in water. If intake pressure drops too low, the pump can lose prime, air pockets form, and flow becomes inconsistent. Pressures higher than this minimum aren’t required for the clean, reliable draw from the supply and can complicate coordination with the source. So the required minimum intake pressure is 20 psi.