V3 13 Regulator repair kit
Applicable for:
- AVA Easy, Smart & Go: All models.
• This kit contains key components to restore the function of the control piston (also called the pressure regulator plunger) located in the top of the pump. Its job is to sense water pressure and activate a spring-loaded mechanism that communicates with the electrical switch, telling the machine when to start or stop.
• The kit includes piston, seals, and spring needed to restore the regulator function of your AVA V3-series pump.
Recommended for qualified technicians – Always consider a complete module kit.*
*We offer and recommend fully assembled kits for pump and electric modules. These simplify the process and help ensure long-term performance.
This individual repair kit is ideal for experienced users or service technicians who have already confirmed that surrounding parts are in good condition.
If you suspect frost damage, or the root cause is unclear, we strongly recommend a complete 5-Year Warranty and Repair Kit instead.
See complete overview of our Warranty & Repair kits here.
Typical cause of failure
- Internal wear over time.
- Dirt or limescale causing the piston to stick.
- Water left in pump during storage – leads to frost damage.
- Overpressure or mechanical misalignment.
Failure symptoms – Part correlation
- Machine does not stop when the trigger is released.
- Machine fails to start despite water flow.
- Delay in pressure response.
- Leaks around the regulator (especially after frost exposure).
Installation advice
Always priority safety first: Safety instructions – AVA of Norway
Disassemble the piston unit following the appropriate guide below, then:
• Remove all old seals and clean pistons and mating surfaces thoroughly
• Fit the oil seal in the aluminium guide plate with open side facing the oil, and the tapered lip pointing upwards
• Replace the oil chamber O-ring
• Press the high-pressure seals into the valve housing first, then mount the housing back onto the piston unit
Tools Needed for all AVA Pressure Washer Maintenance – AVA of Norway
Click here for Easy guide and then:
- Follow the guide to step 10. Then disassemble the piston set by removing the lower 3 bolts and release piston guide from oil chamber. Remove pistons by pulling them out and Then replace oil sealing. Insert high pressure sealing to the valve body. Control oil level, change oil chamber O-ring and assemble the piston guide. Then follow the remaining steps in guide.
Click here for Go guide and then:
- Follow the guide to step 11. Continue with the same replacement steps as described on Easy above.
Click here for Smart guide and then:
- Follow the guide to step 9. Continue with the same replacement steps as described on Easy above.
Warranty and Self-Repair – The AVA Way
At AVA, we encourage repair – not throwaway culture. You’re free to open your machine, inspect it, and replace parts yourself without losing your warranty.
We offer guides, spare parts and support so you can keep your machine running for years to come – whether it’s a simple O-ring or a full pump module.
Many parts are designed to be replaceable – just like they should be.
Signs of use or repair are welcomed – they mean your product is being maintained.
Read more here: AVA Warranty Terms & Conditions
Price includes VAT
V3 13 Regulator repair kit
Applicable for:
- AVA Easy, Smart & Go: All models.
• This kit contains key components to restore the function of the control piston (also called the pressure regulator plunger) located in the top of the pump. Its job is to sense water pressure and activate a spring-loaded mechanism that communicates with the electrical switch, telling the machine when to start or stop.
• The kit includes piston, seals, and spring needed to restore the regulator function of your AVA V3-series pump.
Recommended for qualified technicians – Always consider a complete module kit.*
*We offer and recommend fully assembled kits for pump and electric modules. These simplify the process and help ensure long-term performance.
This individual repair kit is ideal for experienced users or service technicians who have already confirmed that surrounding parts are in good condition.
If you suspect frost damage, or the root cause is unclear, we strongly recommend a complete 5-Year Warranty and Repair Kit instead.
See complete overview of our Warranty & Repair kits here.
Typical cause of failure
- Internal wear over time.
- Dirt or limescale causing the piston to stick.
- Water left in pump during storage – leads to frost damage.
- Overpressure or mechanical misalignment.
Failure symptoms – Part correlation
- Machine does not stop when the trigger is released.
- Machine fails to start despite water flow.
- Delay in pressure response.
- Leaks around the regulator (especially after frost exposure).
Installation advice
Always priority safety first: Safety instructions – AVA of Norway
Disassemble the piston unit following the appropriate guide below, then:
• Remove all old seals and clean pistons and mating surfaces thoroughly
• Fit the oil seal in the aluminium guide plate with open side facing the oil, and the tapered lip pointing upwards
• Replace the oil chamber O-ring
• Press the high-pressure seals into the valve housing first, then mount the housing back onto the piston unit
Tools Needed for all AVA Pressure Washer Maintenance – AVA of Norway
Click here for Easy guide and then:
- Follow the guide to step 10. Then disassemble the piston set by removing the lower 3 bolts and release piston guide from oil chamber. Remove pistons by pulling them out and Then replace oil sealing. Insert high pressure sealing to the valve body. Control oil level, change oil chamber O-ring and assemble the piston guide. Then follow the remaining steps in guide.
Click here for Go guide and then:
- Follow the guide to step 11. Continue with the same replacement steps as described on Easy above.
Click here for Smart guide and then:
- Follow the guide to step 9. Continue with the same replacement steps as described on Easy above.
Warranty and Self-Repair – The AVA Way
At AVA, we encourage repair – not throwaway culture. You’re free to open your machine, inspect it, and replace parts yourself without losing your warranty.
We offer guides, spare parts and support so you can keep your machine running for years to come – whether it’s a simple O-ring or a full pump module.
Many parts are designed to be replaceable – just like they should be.
Signs of use or repair are welcomed – they mean your product is being maintained.
Read more here: AVA Warranty Terms & Conditions
