Drive Type: Pressure washers and Jetters are divided up into 3 basic drive types. Jetters start at the 4 GPM mark and go up from there, 8-9 GPM for portable models and up to 18-25 GPM for trailer mounted equipment. Last but not least, Gearbox Drive pumps offer the same speed reduction benefit and long life of belt drive systems (1450-1600 RPM), higher oil capacity etc… but, offer more space efficient design options due to the compactness of the gear drive vs. These light duty pumps run hotter, higher RPM, hold less oil and have smaller faster wear parts. So, your larger pressure washers might be effective for jetting up to 4″ pipe. Larger units will include a water tank to supply both the right amount of incoming water for the unit and to provide for cooling of the pump for longer periods in bypass (flow is turned off with a valve but the engine is running). Jetting hose is lightweight, abrasion resistant, slippery, and push able when inside pipe.When shopping for a jetter also keep in mind that gearbox driven and belt driven units provide better pulsation due to the longer slower plunger stroke. Like anything else you might buy for your business, a jetter needs to be effective for the job it’s designed to do.But the answer doesn’t stop there, what are the differences?First, and most obvious is the hose and nozzle. So here are a few of the basic differences…Flow (GPM): Your typical pressure washer is between 2.
OK so we get this question all the time…can I use my pressure washer as a jetter? The short answer is yes (with the right tools).So let’s get more detailed about the differences between a Jetter and a pressure washer. Higher GPM is needed for tougher jobs like grease and tree roots. A jetter is built specifically to do the job. The clog, grease, scale, roots and sludge don’t know or care about the name of the machine that is supplying high-pressure water via the jetter nozzle. The better it does its job, the more likely it is to become a profit center for your business. There are specialty nozzles available for jetters to make cleaning more effective however, a lot of the industry’s best tools are not available for lower “pressure washer” sized GPM’s. A direct drive basically means 2 things, the pump is directly connected to the engine and the pump runs at the same RPM as the engine. In most cases that’s where the similarity ends. Belt Drive units have long been the standard of the commercial industrial cleaning market, with the main benefit being the reduction of speed between pump and engine.
Even among pressure washers there is a huge difference between hardware store models and one made for professional cleaning contractors. They are often high pressure (2700-3000 PSI) but lower HP (5-7) units, which is the first indication of lower GPM or Gallons Per Minute. Direct Drive units dominate the pressure washer market and are sold by hardware stores and commercial dealers alike. These machines are not built with the heavy duty parts like commercial duty equipment. Jetting nozzles are designed to pull the hose into the line and provide proper cleaning. Our rule of thumb for flow is 1 GPM per 1″ of pipe diameter for “normal” flushing and maintenance.. Belt driven pumps will typically outlast a direct drive pump 4:1.Duty Cycle: A much larger segment of the pressure washer market is geared towards homeowners and light duty users.5 and 4 Gallons Per Minute. Let’s face it, the basics are the same.Features: Jetters and pressure washers alike both come with a pump, engine, and some form of pressure control (usually an unloader valve).
A professional Jetter will have additional features like a pressure gauge to aid in making adjustments, a pulsation valve to create hose shake when needed, a hose reel with adequate continuous length of jetting hose, multiple jetting nozzles, and a method of turning the flow to the nozzle on and off. the size and spacing needed for a belt driven unit. They are most often direct drive pumps and in recent years the trend is going toward even smaller, cheaper built pumps. Some of them are not bad units, just not built for a substantial amount of use. Most belt drive pumps run between 1450 and 1750 RPM, are larger than direct drive pumps, run cooler, hold more oil, and are made with bigger heavy duty parts