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Pressure Washer Siphon Troubleshooting
How do I get the pressure washer to siphon?
For basic operating instructions related to your specific pressure washer, please refer to your product Owner's Manual.
Possible causes for lack of siphoning include:
Chemical hose placed on improper port -
Check clear hose placement.
Pressure washer is not set to low pressure -
The unit must be set to low pressure to apply soap. Adjustable nozzles need to be pulled forward about 1/4", while units utilizing quick connect tips require the small black tip to be installed.
Extension is being used on the high pressure hose -
Remove extension on high pressure hose.
Chemical injection area is clogged or component needs to be replaced -
Test for blockage: Remove nozzle extension from gun, attach and turn on water source, then pull the trigger. If the unit then siphons (for units built 2006 or before) remove the o-ring in the nozzle extension (on the end that butts up to the gun) with a small screwdriver, turn the metal shaft upside down, and tap to remove the inline filter. The filter is not necessary, so removing it will not cause any damage. If the unit now siphons, you have isolated the problem.
If the unit does not have the inline filter (units built after 2006 or the filter has been already removed) and the unit is still not siphoning: Start the engine and remove the high-pressure hose from the pump. If the unit siphons, add one piece at a time until you lose the siphoning action to isolate the piece that would need to be cleaned out or replaced.
If the unit still does not siphon, there may be an internal pump issue which would require the unit to be examined by an Authorized Service Dealer.
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