Q: The EPW2-ST5.5 pressure washer is not producing water - what should I do?

If your pressure washer EPW2-ST5.5 is not producing water , here are the checks to perform in order: 1. Check the water supply Open the water supply tap - This is the first and often forgotten step. The device cannot operate without a supply. Check that the water inlet pressure is between 0.3 and 0.6 MPa (3 to 6 bar) . If your network pressure is too low, the washer will not deliver water. Ensure that the supply hose is not compressed or kinked along its entire length. 2. Clean the water filter A clogged water filter is the most common cause. Inspect and clean the inlet filter before each use, according to the manual instructions. Make sure the filter is properly connected after cleaning. 3. Check the nozzle The nozzle may be partially blocked , obstructing the flow of water. Unclog it gently with a small needle or a thin object (without damaging the opening). If you suspect a clogged supply hose, consult our tips on unclogging the hose of the EPW2-ST5.5 washer. 4. Check seals and leaks Inspect the seals of the hose and lance - worn seals allow water to leak instead of propelling it. They may need replacement. Important: This device is not designed to be connected directly to the drinking water network. Ensure that a backflow prevention device is in place. If after these checks water still does not come out, consult an authorized STERWINS after-sales service.

Q: How to unlock the locked trigger of the gun handle?

The trigger safety lock of the STERWINS 110C EPW.3 is a protection system that prevents any accidental activation of the gun handle during transport or storage. To unlock and use the trigger: Step 1: Press the safety lock located on the gun handle to unlock it Step 2: Then press the trigger until you achieve a stable and constant water jet Step 3: Release the trigger as soon as you stop cleaning Important: The safety lock does not keep the trigger in the on position . It is simply a protection against accidental activation. You must maintain pressure on the trigger for the device to operate. As soon as you release it, the jet stops immediately. Essential safety instructions: Always hold the pressure washer with both hands during operation to control the recoil. Ensure that the safety lock is properly engaged when not in use, especially before leaving the tool unattended or during storage.

Q: What are the dimensions of the high-pressure hose thread of the STERWINS 135C EPW.3?

The high-pressure hose thread of the STERWINS 135C EPW.3 is not specified in detail in the manual provided with the device. The manufacturer recommends the exclusive use of hoses, fittings, and connectors recommended for this model. However, the specifications indicate that the recommended water supply hose must have a minimum diameter of 13 mm (1/2 inch) . For the precise dimensions of the high-pressure hose thread and specific connectors, consult the label or documentation provided with the included hose , or contact STERWINS customer service directly with the model reference 135C EPW.3 .

Question 1

The EPW2-ST5.5 pressure washer is not producing water - what should I do?

Accepted Answer

If your pressure washer EPW2-ST5.5 is not producing water, here are the checks to perform in order:

1. Check the water supply

Open the water supply tap - This is the first and often forgotten step. The device cannot operate without a supply.
Check that the water inlet pressure is between 0.3 and 0.6 MPa (3 to 6 bar). If your network pressure is too low, the washer will not deliver water.
Ensure that the supply hose is not compressed or kinked along its entire length.

2. Clean the water filter

A clogged water filter is the most common cause. Inspect and clean the inlet filter before each use, according to the manual instructions.
Make sure the filter is properly connected after cleaning.

3. Check the nozzle

The nozzle may be partially blocked, obstructing the flow of water. Unclog it gently with a small needle or a thin object (without damaging the opening).
If you suspect a clogged supply hose, consult our tips on unclogging the hose of the EPW2-ST5.5 washer.

4. Check seals and leaks

Inspect the seals of the hose and lance - worn seals allow water to leak instead of propelling it. They may need replacement.

Important: This device is not designed to be connected directly to the drinking water network. Ensure that a backflow prevention device is in place. If after these checks water still does not come out, consult an authorized STERWINS after-sales service.

Question 2

How to clean and unclog the hose of the EPW2-ST5.5 pressure washer?

Accepted Answer

The 8-meter hose of the STERWINS EPW2-ST5.5 pressure washer can become dirty or clogged over time, which reduces water flow or completely stops the jet. Here’s how to effectively unclog and clean it.

Before you begin: Turn off the machine, unplug it, and close the water supply tap. Wait a few minutes for the pressure to drop before handling the hose.

Checking and unclogging the hose: Start by checking that the hose is not bent, crushed, or knotted, as this would reduce water flow. Then detach the hose from the machine and the gun by unscrewing the fittings. To unclog a hose blocked by deposits or limescale, hold the hose vertically and slowly pour warm water (below 40°C) from top to bottom to rinse it. If the water does not flow, the deposit is likely limescale buildup. In this case, fill a bathtub or container with a solution of 1 part white vinegar to 3 parts water, then submerge the hose for a few hours. This solution will gradually dissolve the limescale deposits. Rinse thoroughly with clear water until the water is clear and the vinegar is no longer detectable.

Cleaning the 5-in-1 nozzle: The issue sometimes comes from the nozzle, not the hose itself. The nozzle openings may be partially or completely clogged. To clean the openings, gently insert a fine needle or a paperclip into each opening to remove deposits. Set the nozzle to high-pressure 0° (the precision one) for easier access to the openings. Test each position of the nozzle under a water jet to ensure it does not leak anywhere.

Cleaning the water filter: Before reassembling, inspect and clean the water intake filter, located on the water inlet fitting. A clogged filter significantly reduces flow and can damage the pump. Rinse it under running water to remove particles and debris. Also check the water supply connection adapter and clean it if necessary.

Reassembly and testing: Reinstall the hose by screwing it firmly back onto the machine and the gun. Open the water supply tap, plug in the machine, then pull the trigger until you get a stable and continuous water jet. Let the device run for a few seconds to expel air from the hose and any cleaning residue. Test on a discreet surface before cleaning your usual surfaces. If the flow remains low after these steps, consult the troubleshooting guide or contact customer service.

Question 3

The foam/detergent system does not draw detergent from the tank - what should I do?

Accepted Answer

The detergent suction system of the STERWINS EPW2-ST5.5 cleaner works by depression created by the water flow. When you activate the foam mode (nozzle position 5), water flows through the nozzle and creates a low-pressure area that draws detergent from the connected bottle. If the detergent is not being drawn up, here are the points to check in this order:

Nozzle position: Make sure that the 5-in-1 nozzle is in the foam position (the 5th position). To change position, turn the nozzle to the corresponding pictogram. Only this position activates the detergent suction circuit.
Filled and connected bottle: Check that the detergent bottle contains enough detergent. Also, ensure that the bottle's hose is properly inserted into the cleaner's top cap. A loose or incomplete connection prevents suction.
Detergent thickness: Use a detergent recommended for pressure washers. If the detergent is too thick or concentrated, dilute it with water according to the manufacturer's recommendations, as this may prevent suction.
Clogged detergent filter: The EPW2-ST5.5 cleaner is equipped with a detergent filter that must be inspected and cleaned before each use. A partially or completely clogged filter blocks detergent suction. Remove the detergent filter (cross-shaped part at the top cap) and clean it with a soft brush or a pointed object (paperclip) to remove residues.
Clogged bottle suction hose: Inspect the hose connecting the bottle to the top cap to determine if there is a blockage (dried residues, impurities). Clean the hose by rinsing it with clear water or using a thin object to remove any blockage.
Insufficient water flow: The detergent is only drawn if the water flows with sufficient pressure. Check that the water supply tap is fully open, that the inlet hose is not bent or compressed, and that you have pressed the trigger to operate the machine.

If after these checks the detergent is still not being drawn, the detergent filter may be defective or damaged. You can obtain a replacement detergent filter (reference: cross-shaped filter ST3,5x30) from STERWINS customer service. The internal circuit of the cleaner may also have a blockage requiring professional intervention.

Question 4

How to unlock the locked trigger of the gun handle?

Accepted Answer

The trigger safety lock of the STERWINS 110C EPW.3 is a protection system that prevents any accidental activation of the gun handle during transport or storage.

To unlock and use the trigger:

Step 1: Press the safety lock located on the gun handle to unlock it
Step 2: Then press the trigger until you achieve a stable and constant water jet
Step 3: Release the trigger as soon as you stop cleaning

Important: The safety lock does not keep the trigger in the on position. It is simply a protection against accidental activation. You must maintain pressure on the trigger for the device to operate. As soon as you release it, the jet stops immediately.

Essential safety instructions: Always hold the pressure washer with both hands during operation to control the recoil. Ensure that the safety lock is properly engaged when not in use, especially before leaving the tool unattended or during storage.

Question 5

What are the dimensions of the high-pressure hose thread of the STERWINS 135C EPW.3?

Accepted Answer

The high-pressure hose thread of the STERWINS 135C EPW.3 is not specified in detail in the manual provided with the device. The manufacturer recommends the exclusive use of hoses, fittings, and connectors recommended for this model.

However, the specifications indicate that the recommended water supply hose must have a minimum diameter of 13 mm (1/2 inch). For the precise dimensions of the high-pressure hose thread and specific connectors, consult the label or documentation provided with the included hose, or contact STERWINS customer service directly with the model reference 135C EPW.3.

Question 6

How to generate foam with the STERWINS EPW2-ST5.5 pressure washer?

Accepted Answer

The STERWINS EPW2-ST5.5 pressure washer is equipped with a 5-in-1 nozzle that has a special position for generating foam. This function allows you to effectively apply detergent to surfaces before high-pressure cleaning.

Preparing the foam system: Start by filling the detergent bottle provided with the device with a suitable foam detergent. Then connect the bottle hose to the pressure washer by attaching it through the top cap of the machine. Ensure that the connection is tight.

Adjusting the nozzle: The 5-in-1 nozzle offers 5 different positions for various uses. To generate foam, turn the nozzle to the Foam position (the last position). To do this, place one hand on each side of the rotating part of the nozzle and gently turn it until it aligns with the foam pictogram. The other available positions are: High pressure 0 (very precise targeting), High pressure 25 (large surfaces), High pressure 40 (very large surfaces), and Rotary (precise targeting).

Usage: Once the nozzle is set to foam mode and the detergent bottle is connected, turn on the machine by plugging it in and setting the power switch to ON. Open the water supply tap and press the trigger on the gun handle. The detergent will now be sprayed in foam form.

Usage tips: Foam is ideal for pre-treating surfaces before high-pressure cleaning. It allows the detergent to adhere well to dirty or greasy surfaces. Inspect the detergent filter before each use and clean it if necessary. After prolonged use, check that the bottle hose is not clogged; if it is, dilute the detergent with water.

Question 7

What is the pictogram on the nozzle of the STERWINS EPW2-ST7.5 pressure washer for dispensing detergent?

Accepted Answer

On the STERWINS EPW2-ST7.5 pressure washer, the nozzle that dispenses detergent is generally identified by a specific pictogram. This pictogram is often represented by:

An icon in the shape of a bottle or flask, symbolizing a liquid product or detergent.
Sometimes, drops or bubbles are added to indicate the use of a cleaning product.

This symbol is engraved or printed on the nozzle or nearby, allowing it to be distinguished from other nozzles intended for a standard high-pressure water jet.

To use the detergent, you generally need to:

Install the nozzle with the detergent pictogram on the gun.
Activate the detergent tank if your device is equipped with one.
Adjust the pressure and cleaning distance according to the recommendations for optimal use of the detergent product.

This nozzle allows for the dispersion of detergent mixed with water at low pressure, thus facilitating deep cleaning of surfaces.

Question 8

Why is the cleaning product not coming out of my STERWINS EPW2-ST7.5 pressure washer?

Accepted Answer

If the cleaning product is not coming out of your STERWINS EPW2-ST7.5 pressure washer, several causes may be responsible. Here are the steps to check to resolve this issue:

1. Check the cleaning product tank

Make sure the tank is sufficiently filled.
Check that the tank lid is properly closed to avoid any leaks or poor suction.

2. Check the hoses and connections

Inspect the suction hose of the cleaning product for any blockage, kinks, or damage.
Replace or clear the hose if necessary to ensure free flow of liquid.

3. Use the correct accessory

Ensure that you have installed the nozzle or lance intended for applying the detergent.
An incorrect accessory may prevent the cleaning product from coming out.

4. Check the operating mode

Confirm that the device is set to detergent mode, if this option is available on your model.

5. Purge the air from the system

Run the washer for a few seconds without using the cleaning product to expel any trapped air in the hoses.
Then, try activating the product output again.

By following these tips, you should be able to identify and resolve the cause preventing the cleaning product from coming out. If the problem persists, it may be helpful to check the overall condition of the pump or contact a specialized after-sales service.

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