If you're having gas pressure washer unloader valve problems, read my expert tips on how the valve works -- and how to repair or replace it!
An unloader valve is attached to the side of your gas pressure washer pump. It's responsible for safely directing the flow of the water, from your garden hose, to your pump. It's job is to keep your pump from being damaged. See how:
When you pull the trigger on your spray gun, the unloader valve opens wide to send your water through the pump. Then the pressurized water flows through to your spray wand.
And, when you stop spraying, it closes and it redirects the water through a hose and it is recycled through the pump again.
Basically, the unloader valve works like a safety device for your pump. It makes sure that too much pressure doesn't build up in your pump!
Your unloader valve has an adjustable spring inside of it. If you tighten or loosen that spring, you can decrease or increase the pressure of the water coming out of your washer.
If you're having some high and low PSI problems with your gas pressure washer, it might be because your unloader valve spring is not properly set. And it might need to be adjusted.
Yes, the spring can be loosened or tightened to readjust, but truthfully, it's something that I've ever done myself. If you're really mechanically inclined & experienced, you can certainly do it yourself. But most people take their unit to a local service or repair shop to get this adjustment done.
What happens if your gas pressure washer unloader valve fails? Great question. Your balance relief inlet, on your washer, is your secondary safety feature that will kick in and release the built up pressure in your pump. You'll be protected. But you'll have to replace your gas pressure washer unloader valve before you start your power washer again - otherwise you could do some serious damage to your pump.
You could always take your unit to a service or repair shop to replace this part. But many gas pressure washer users tackle the replacement job themselves. Even if your local hardware store or big box doesn't stock this part, you'll find lots of websites that sell them.
When you look for this part, always match up the inlet & outlet size, GPM (Gallons per Minute) and PSI (Pounds Per Square Inch) specs from your pressure washer - with the specs of the replacement part. This is important! Your owners manual lists these specs for you.
Thinking about getting a new pressure washer? Before you buy, get my pro review of the best pressure washers on the market! My expert reviews will save you time & money. Just click on one of my photos, below, to get the information you need:
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