Overview
The Gun RL 37 is a heavy duty pressure washer gun rated to 5000 psi, built for commercial machines that run high pressure and high flow. The listing states a maximum pressure of 5000 psi, a 160C temperature rating and 40 litres per minute flow, which places it squarely at the top of the pressure cleaner range and well above the entry level guns. The gun is built for machines that run at the top of the commercial range, where the trigger, seals and body have to survive sustained daily use rather than occasional weekend washing.
At that rating the gun suits the diesel and hot water machines in the pressure washer range, where the fittings and seals need to handle sustained high pressure work. It is the sort of gun an operator runs all day on fleet washdown and plant cleaning, so the build quality matters as much as the rating.
Key Features
- Maximum pressure 5000 psi
- Flow rate 40 litres per minute
- Temperature rating 160C
- Heavy duty commercial build
- Suits the high pressure machines in the range
Specifications
- Maximum pressure: 5000 psi
- Maximum temperature: 160C
- Flow rate: 40 litres per minute
- Product: pressure washer gun RL 37
Applications
- Truck, trailer and plant washdown
- Fleet maintenance and degreasing
- Building and concrete cleaning
- High pressure commercial cleaning
- Hot water pressure washer work
What You Need to Complete the Job
Run the gun with a V grip lance 1200mm for reach, and fit a 5 piece nozzle kit for the spray angles. For work that needs a shorter handle, the V grip lance 900mm matches the same gun, and the Pressure Washers Accessories range holds the rest of the kit.
Frequently Asked Questions
Is this gun rated for hot water?
Yes. The listing states a 160C temperature rating, which covers the hot water machines in the range that run up to 93C maximum. That makes the RL 37 a match for both the cold diesel machines and the hot water units. The listing does not give a thread size for the gun inlet, so confirm the fitting matches the delivery hose before ordering.
What pressure machines does it suit?
With a 5000 psi maximum and 40 litres per minute flow, it suits the high output machines in the pressure cleaner range. It is a step up from an entry level gun, so it is the right choice for commercial machines rated near its maximum.
What lance fits this gun?
The V grip lances in the range connect through a 1/4 inch BSP male inlet, which is the standard gun fitting. The 900 mm and 1200 mm lances both suit, depending on the reach you need for the job.




