Diaphragm Pump:

EVERFLO Diaphragm Pump-EF4000-4.0 GPM-60 PSI-13 AMPS-1/2" FPT:

The EF4000 Everflo 12 Volt Diaphragm Pump is ideal for fluid transfer applications, agricultural sprayers, spot sprayers, and is even rated for Round-Up.

This lightweight and versatile Everflo diaphragm pump comes equipped with a polypropylene pump housing and valve plate, viton valves and a santoprene diaphragm. This Pump also features a flow demand switch that automatically turns the pump on and off as flow is required. This feature eliminates the need for a pressure regulator or by-pass valve also making this a very efficient electrical draw pump, as power is only used when the pump flow is in demand.

Please remember that Demand Pumps require a balanced flow. Too small of a nozzle (whether on your Spray Gun or on your Spray Boom) may restrict the flow resulting in your Demand Pump repeatedly shutting off and on.

We recommend using the AA122-1/2-PP Poly Line Strainer to help eliminate contaminates from running through your Everflo Pump. Please see the Related Products tab to view the Everflo pump in different flow

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HOW A PRESSURE WASHER PUMP WORKS

HOW A PRESSURE WASHER PUMP WORKS

Moving a column of water to create a flow is what a pump actually does. When water passes through a nozzle, pressure results from a restriction on that column of water. What we really mean when we speak of a pump’s ability to develop a certain pressure at a certain flow is that the pump is capable of moving that quantity of water per minute through a restriction or nozzle which will create the specified pressure. 

Most pressure washer pumps used in the pressure washing industry rely on a system of cylinders and valves in order to develop a flow of water. The activity of motion of a piston or plunger in the cylinder pulls water through the inlet valve and the upstroke discharges the water through the outlet valve. These valves essentially send the water through the pump by preventing backflow. 

The simplest valve design consists of a poppet and a spring which is hydraulically operated by differences in pressure on either side of the valve.  The valve opens when the pressure against the valve starts to exceed the ability of the spring to hold closed the poppet.  The valve is held closed and prevents flow of the water in the wrong direction on the opposite stroke; This is when the water presses the poppet against its seat.

There are three ways the flow of water through the pump can be controlled: By lengthening or shortening the stroke of the piston or plunger, by increasing or decreasing the speed at which the pump operates or by increasing or decreasing the bore of the cylinder.

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Before the temps dip too far, make sure your pressure washing ..

 Before the temps dip too far, make sure your pressure washingPressure washing equipmentt is prepared for freezing temperatures.

In extremely cold temperatures and high winds, your Water Cannon Pressure Washing equipment can take a beating. When wintery weather dips below 32 degrees F, water filters can freeze and break, hot water coils can freeze and burst, and ceramic plungers in the water pumps can spider crack if water isn’t blown out. To prevent these problems and more, you just need to take some extra precautions. Take a look at this insider’s guide to preparing for the freezing cold.

How to winterize your Gas Powered Water Cannon Pressure Washer

You will need a short section of garden hose, a funnel, hose clamp, and a 5 gallon bucket with any type of antifreeze coolant.  Attach the hose to the funnel and the other end of the hose to the inlet of the pump.   You will need a friend to hold the funnel and the trigger gun while you start the machine and begin pouring the anti-freeze into the funnel.   Your friend should be triggering the gun off and on a couple times to insure that the antifreeze protects the unloader as well as the trigger gun, hose and coil if it is a hot water unit.  As soon as you see the antifreeze coming out of the trigger you can capture what is left of the antifreeze in the bucket.  You can then run the unit for only a few seconds without the antifreeze to clear the pump.  At this point you can drain the remaining antifreeze from the hose and trigger into the bucket for use at another time.  This will not only protect your equipment from freezing but will also keep seals lubricated throughout.

Another option is to simply drain the water from the hose and gun, and if your unit has a direct drive pump, remove the pump from the motor and store them both in a warm location such as a basement.

As for the engine, you can either drain the fuel tank and run the engine until it has run the gas out or leave the fuel in the tank and add a fuel stabilizer such as Stabil.   I recommend changing the oil before putting it away for the season so that it is ready to go for next year.

The burner system does not need a whole lot of attention except to run a diesel fuel stabilizer through the system.

The main goal is to completely remove the water from all of the accessories, hoses and the pump assembly. With the system turned off, release any trapped pressure by squeezing the trigger gun. Disconnect the trigger gun and wand assembly.   Drain the water from the Trigger gun by holding the trigger gun in a vertical direction while squeezing the trigger to let the water run out. Next disconnect your high pressure hose assembly and coil up into to 3 or 4 foot loops allowing one end of the hose on the ground so the water can drain out during the coiling process.

 If you have quick connects it is a good idea to snap the quick connects together to avoid insects from making your pressure washing hose it's winter home. If you have a chemical, foam or soap injector follow the same technique to clear them of all water. 

Now let's work on the high pressure pump and inline filters, with the engine switch in the off position pull the engine recoil until water stops shooting out of the pump outlet, normally six pulls will do the job. Depending on the water filter inlet you may want to disassemble the filter if it has a water trap.

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How to select the correct nozzle for the pressure washing task:

How to select the correct nozzle for the pressure washing task

Pressure washer spray nozzles are conveniently color coded so you can select the straight zero degree which is red or a fan degree nozzle which are angled nozzles. The angled nozzles come in 3 dispersed angle pattern, the 15 degree is yellow, 25 degree is green and the white 40 degree has the widest angle for the high pressure nozzles.

When choosing an angled nozzle consider the concentration of pressure you want on the surface for example;

A 15 degree yellow nozzle packs the most power and would be a good choice for cleaning off bubble gum, oil stains, baked on grease from a BBQ grill or any stubborn stain.

The 25 degree nozzle is the most widely used because it has enough concentrated power for most jobs and covers a slightly wider pattern than the yellow nozzle. Select the 25 degree green for washing painted surfaces, concrete, pool decks, or other standard surfaces that need cleaning.

Wider fan 40 degree white nozzle is a great choice for general washdown jobs, screens, lawnmowers, cars and other surfaces where control of the pressure is more important than powerful blasting.

Chemical injector 65 degree black low pressure nozzles activate the downstream chemical/soap injectors and the wide broadcast pattern covers a lot of terrain fast.

These nozzles can be purchased individually or in low cost convenient packages of 4 or 5 different degree angles.

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PARTS & ACCESSORIES

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