Bypass Unloader Valve

Genuine Part no 9.001-135.0 from an authorised Karcher dealer

Please click on Karcher / Pressure Washer Part category in our shop for many other Karcher parts

Pressure Relief Valve or Bypass Valve for Karcher early electric powered models with the metal pump or gas powered pressure washers. It is the plastic part with the brass bolt and spring on it which can be seen at a right angle from the high pressure outlet.

Upgraded with aluminum cage set and pre-set spring

For selected Karcher Pressure Washers. If you are unsure if this is the correct part for your model please feel free to ask.




Terms of Sale 

We hope that your item meets your expectation, however, if you are not happy with the item then you are welcome to return it in the original, unopened packaging within 30 days for a full refund.
We strongly suggest that all parts are fitted by a competent person with the correct tools and knowledge

Shipping Information


Free Shipping
Items purchased between Monday - Friday and before 1pm are usually dispatched on the same day. All items purchased after this time are usually dispatched on the next working day. 
Items purchased on the weekend are dispatched on the Monday.
Deliveries take 2-3 working days.