The Suttner ST601 is an inline, linear gun that was especially designed to be used with extra long lances, such as the high pressure telescopic lances. The housing is made from impact resistant plastic which also has a safety lock on the trigger and is made from corrosion resistant materials. This wash gun has weep design implemented. The idea behind this design is to allow a small amount of water to continue to pass through the gun even when the trigger is not actuated. This continuous movement of water through the piping, hose and spray device significantly reduces the liquids ability to freeze.