Built to handle the electrical side of a pressure washer based on flow and pressure.

Anyone who's laid eyes on one can tell you that it's instantly recognisable by its distinctive blue coloured housing. This particular PA pressure switch plays a critical role as part of the control system for hot water setups and automatic on/off configurations.

Unlike your run-of-the-mill flow switches that just rely on water movement, this pressure switch uses a tough stainless steel plunger that responds to the build-up of pressure inside the system. When you pull the trigger gun, the sudden pressure increase triggers the microswitch, completing the electrical circuit to either kick the motor into life or light the burner.

All this ensures that the burner system only kicks in when there's sufficient pressure to make it safe, stopping the risk of overheating or dry firing. With a max pressure rating of 4050 psi, this product is built to withstand the rigors of commercial cleaning applications. And, let's face it, getting the right part number for your specific machine is key to keeping things running safely and smoothly.

Features and Benefits

The PA pressure switch has some seriously impressive features that set it apart from the competition - super high resistance openings that give you top-notch electrical insulation, protecting it from moisture ingestion which is pretty common in wet cleaning environments.

This reliability makes it the go to choice for pros who can't afford to be down for the count. One of the key benefits of this switch is that it can handle big electrical loads - rated at 15 Amps at 250 voltage, it can directly control a lot of burner solenoids and motors without needing to add in extra relays.

The pressure settings on the internal spring mean that the switch will kick in at around 580 psi, which is a safe threshold that ensures the system is fully pressurized before the electrical components get going.

Robust Build: Features a stainless steel plunger and a top-quality blue plastic casing that's built to last.
Automatic Control: Automatically opens up or closes down the circuit based on system pressure, protecting the burner and pump.
Super Sensitive: Activates at 580 psi, which means the burner won't fire until there's enough water flow to make it safe.
Universal Fit: The 1/4" NPT connection makes it easy to install on a wide variety of manifolds and unloader valves.

Key Specifications

This PA pressure switch is a real industrial-grade heavy hitter with some serious specs. It's got a standard 1 4 npt (1 4" Male Pipe Thread) inlet thread that makes it compatible with most European and North American pump heads. The electrical power rating is pretty substantial, handling up to 250V and 15A, which is about right for most hot water pressure washer units.

The safe operating pressure for this unit tops out at 4050 psi, giving you a healthy safety margin for 3000 to 4000 psi machines. The max fluid temperature is rated at 195°F max, so it can handle even when the water is hot. When you add this component into the mix, you're choosing a part number that says quality.

Inlet Connection: 1/4" NPT (1/4" Male Pipe Thread)
Activation Pressure: 580 psi (40 bar)
Maximum Pressure: 4050 PSI
Electrical Rating: 15 Amps / 250 Volts
Temperature Rating: 195°F max

Installation and Reliability

Installing the PA pressure switch is a pretty straightforward process, but you do need to pay attention to the details. First turn off the machine and bleed off any trapped pressure from the lines. Locate the existing switch on the pump manifold or unloader valve and double-check the part number to make sure it matches your replacement.

Unscrew the old unit and give the new one a bit of thread sealant on the 1 4 npt threads before screwing it in place. Connect the wires to the control circuit - usually a normally open setup that closes when reaching pressure. Once installed, the PA pressure switch will be managing your burner or motor like clockwork.We reckon it's a good idea to take a look at the part number in your manual and just double-check that it is indeed what you need to ensure everything is compatible.

If you're looking to pop a spare into your inventory, just pop the part number into your cart and check out the price. Loads of our customers have actually written a review saying that once they get this part number installed, their system is running like it used to - all systems go again; not a problem at all. Don't be hesitant to chuck this crucial bit into your tool kit, having the right part number to hand means you can avoid all sorts of hassle and downtime. When you go for PA, you're getting a component with a good reputation for being built to last.

(20)VACUUM SWITCH 2.5" HG 1/4 FPT

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(20)VACUUM SWITCH 2.5" HG 1/4 FPT

(20)VACUUM SWITCH 2.5" HG 1/4 FPT

Product Information

Shipping & Returns

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