What issue could cause the nozzle of your hand sprayer to work, while the air pressure remains low?

A worn check valve can lead to situations where the nozzle of the hand sprayer might function, but air pressure remains low due to improper sealing within the sprayer. The check valve is responsible for ensuring that air and liquid do not flow backward in the system, maintaining consistent pressure. If this valve is worn or damaged, it can prevent the system from achieving the necessary pressure while still allowing some liquid to flow through the spray nozzle.

Other options, such as a clogged spray nozzle and incorrect seal, might impede the effective functioning of the spray but wouldn't directly account for the air pressure being low while the nozzle still sprays. A low battery power situation is generally more applicable to battery-operated sprayers; it wouldn't specifically address the relationship between air pressure and nozzle function in the context provided. Therefore, recognizing the role of the check valve clarifies how it affects pressure maintenance, leading to the nozzle working inconsistently under low pressure conditions.