Steam Explosion! This is an amazing video shows what happens when the flow switch, pressure switch and high limit switches are bypassed or disabled. Video posted by Dan Swede at Industrial Cleaning Equipment & Supply.

 Note: This is a staged failure, very strict safety precautions were taken during the shooting of this video.
 This will show operators and mechanics what could happen if the safety systems are bypassed or improperly tampering with on hot water pressure washer.
  This is an amazing video showing what happens when the flow switch, pressure switch and high limit switches are bypassed or disabled.
  This is why we always recommend a steam burst relief valve as a final safety precaution. In this video, the burst valve has been removed.  
Caution: Do Not Try This Yourself Injury or Death Can Result!