Weep guns and triggerless guns for continuous duty work. A triggerless or weep gun holds flow without a finger on the trigger, which is what you want on long wash cycles, in dairies and food plants, and anywhere an operator would otherwise be squeezing a trigger for hours.

A weep gun also protects the pump - it bleeds a small flow rather than putting the machine into full bypass, which keeps water moving and heat down. Check the pressure and flow rating against your machine, and match the inlet and outlet threads. These suit fixed installations and wash lines better than general contract cleaning, where a standard trigger gun with a swivel inlet is usually the better tool.