My hand gun loses pressure.

Here are some possible causes.

It could be the following: 

• Debris in hose or nozzle.
• Pump losing prime.
• Pump pressure dropping/fluctuating. 

Here are some solutions: 

• Unthread nozzle tip and clean
• See Remedy for Pump will not prime or loses prime.
• See Remedy for Pressure drops/fluctuates during standard operation.