Unlock the Right Part
for Your Repair
Find the exact part you need
Enter your model number to see parts that fit your machine.
Price Match Guarantee
In-stock parts ship the same day
365-Day Return Policy
Price Match GuaranteeChoose Product
Identify Problem
03
Find Solutions
HomeRepair HelpGenerac Pressure Washer RepairGenerac Pressure washer leaking water Repair
Generac Pressure washer leaking water
If your Generac pressure washer is leaking water, the pump assembly is the most likely source. A worn or damaged pump assembly can leak from the pump or bottom of the pressure washer, especially after several years of frequent use. Replace the complete pump assembly when the unit is older or heavily used. If the pump is newer and used occasionally, rebuilding it or replacing the pump seals may correct the leak. The pump itself is the next likely cause, and it may also need to be rebuilt or replaced depending on its age, condition, and use. A thermal release valve can also release water during normal operation. If the pressure washer runs without spraying, water trapped in the pump heats up, causing the thermal relief valve to open and discharge hot water. Stop the engine or motor when you are not actively spraying, and inspect the pump, pump seals, and thermal release valve for damage. Enter your Generac pressure washer model number to find the exact replacement part for your specific machine.
01 - Generac Pressure Washer Pump Assembly
You may need to rebuild or replace the pump assembly. If the pump is more than a few years old, and you use the pressure washer fairly often, replace the pump assembly. If the pump is relatively new, and you don’t use the pressure washer often, either rebuild the pump assembly or replace the pump seals.
Enter model number to search for the required part specific to your product
Top Solution
02 - Generac Pressure Washer Pump
You may need to rebuild or replace the pump. If the pump is more than a few years old, and you use the pressure washer fairly often, replace the pump. If the pump is relatively new, and you don’t use the pressure washer often, either rebuild the pump or replace the pump seals.
Top Solution
03 - Generac Pressure Washer Thermal Release Valve
The leak could be due to the normal operation of the thermal release valve. The thermal release valve allows hot water to exit the pressure washer if the water temperature becomes excessively high. If the pressure washer is left running while it is not spraying water, the water in the pump will begin to heat up. When the water temperature rises above the acceptable limit, the thermal release valve opens to allow the hot water to exit the pressure washer.
Highly Likely
Frequently Asked Questions
Why is my Generac pressure washer leaking water from the pump or bottom?
Is water from the thermal release valve normal on a Generac pressure washer?
How can I check a leaking Generac pressure washer pump before replacing it?
How do I find the correct replacement part for a leaking Generac pressure washer?
What safety steps should I take before repairing a leaking Generac pressure washer?
Shop by Generac Pressure Washer Parts
Shop by Popular Generac Pressure Washer Models
Our Story
Family-owned and operated since 1912, Burke America Parts Group is the longest-running genuine appliance, HVAC, and outdoor power equipment parts solution in North America. At Repair Clinic, we're proud to be an international brand trusted by the pros as well as the DIY community.
About Repair Clinic
© 2026 RepairClinic.com