I use a direct drive no issues if you use a buffer tank it’s a must to use a 12v 3-5 gpm pump to support that pressure washer otherwise u can burn pump but no issues

Yes,the hydrostatic pressure in the buffer tank will feed the pressure washer no problem.The larger the feed line and fluid level in the tote helps as well

Glad to see someone perform that task. I will be using that same set up with the same Honda 4200 PSI 4.0 GPM pressure washer but was not sure if it would work, I am just starting to build my system thanks a lot. I will put water in my buffer tank then let it flow into a 5-gallon bucket and see if it will flow 4 - 5 GPM

You need to feed the water into the tank from the top and only use one line for the pressure washer coming from the bottom of the tank, your water going in and water coming out the same inlet is your problem. I hit your subscribe button and hit your bell. Change it up and you should be fine.

If you are having problems getting enough water flow put a 12 volt 4 gpm water transfer pump coming out of the tank and into the pressure washer. They are like 100 dollars at Tractor Supply

Put a bypass hose feeding back into buffer tank. I run a 5.5 gpm direct drive comet pump and it works perfect. I've been running it for 21/2 yrs with no problems.

A buffer tank is not needed for a 4gpm machine. A faucet normally yields 8gmp

I have a 4 gallons per minute direct drive and I’m legit making a video right now regarding this. Someone told me to make my tank higher than my pressure washer. I want a buffer tank so I can use my softwash system and maybe to down stream with a proportioner. also I’m setting up a bypass from my machine to the buffer. . I’m also just stacking money to replace it with a 8 gpm.

Tie into a line feeding to a float valve and double feed the pump, you will always have a good amount of pressure feeding the pump, when the tank gets full the supply water will feed the pump 100%.

4gpm machine most cases needs to be gravity fed, so you have to fill that tank atleast halfway up and it should be plumbed down towards your inflow

The only reason you need a buffer tank on a pump that small is just to send water from the unloader to keep the pump cool when not using the gun, you can even just let it run on the ground.

$150 bucks on 5 gpm pump on buffer tank outlet,no need to worry about flow or cavitation.

That little noise is pump cavitation, it will ruin that pump!!!

Funny to come across this video. Earlier today I tried the same thing with a 2.5 GPM /3000 psi. It worked fine but it felt just slightly light in the volume. But even still my surface cleaner was working great. The surface cleaner is a better indicator of a proper amount of water volume and pressure than a wand with a yellow tip on it. I tasted it with only about 10 gallons of water in the tank with a 75ft garden hose feeding the pump. If I tested it with 55 to 100 gallons of water and a 5ft hose to the pump, I would probably not be able to tell the difference between gravity fed and house fed. I believe that any pump that is pushing water out one end is automatically creating a vacuum on the other end. A 12 volt can start off dry and suck up water, just like a wet vac. But my 2.5 GPM pressure washer most likely needs to first have water fed to it, then as it pushes water out one end it creates a vacuum and continues to draw water in and through the pump. Can a belt driven pump start off dry and suck water up like a 12 volt can?

Some of the direct drives may pull some water, but some won’t. Either pump water from the buffer or swap to a gear drive pump.

yea get rid of the hose and do a braided clear hose 1" to it and prime it then fire it up and itll feed np. done.! volume=success

The noise may be that the pump isn’t getting a steady flow of water like it would from the tap. If your tote was full of water it would flow a lot better also. If your pressure washer was lower than the tank it would flow better.

I have a direct drive also yes it can be done but you might fall in the risk of burning your pump because u have to hold trigger - but now they sell these unloaded valves that will not have to hold gun constantly and can pour the released water in buffer tank with no issues

Why aren't you feeding the buffer tank from the top? Keep enough water in it and a larger supply line to the machine and the water pressure in the tank should feed it fine

You may be actually creating a vacuum (Venturi) when feeding into the tank, therefore actually creating suction to the pump. Try buying a bulkhead to add another connection to the tote itself to supply water. Does the gun spray when the motor is not on and both valves are open? I didn’t see you do that. I would guess the wand actually sucks when both valves are open.

Irene is our predator 420 CC and it's worked

Put a 12v pump between buffer tank and pressure washer

yes you need a bypass from the unloader to the buffer tank you can ruin the pump

I think need it a bypass and secund pomp broth with battery. But if work fine like that. Cool. You cat pomp anyway those the Best

How is that set up going after the buffer tank? Those 3 red valves. Can you send me the links? Thanks! Cheers from Texas!

Is that a CAT 66 series pump? Those will draw water fine. It’s the other 4gpm pumps that won’t

My direct drive pump won't feed from a tank like this, wish it would

So just run a 12v pump to feed the buffer to the washer

I think you need to install a bypass

All the need is a water pump to pump the water to your washer

What size hoses or you useing

Can you run that 5.5 GPM pump with just hooking straight up to the house? I’m thinking it can be done. I’m up in Pasco county and we have good water flow. I just don’t wanna mess with a buffer tank but want to get 5.5 for more flow.

Get a belt driven and you can run it how u want with no issues so replace your machine and you will be ok

You should get a real machine. That would solve all your issues

Usually u should get 2inch inlet barb and run 2 inch hose from buffer to pw