Sounds very odd. Give these guys a call. They helped me when I had problems with my Nilfisk resulting in a zero cost repair. Really helpful and will only sell you something if you really need it.

http://www.northwestpowerwashers.co.uk/

If it needs parts they will be able to supply them.

 

Very odd. I've had my P150 for over 10 years and no such problems. It sounds as if it is producing too much pressure if it is still leaking with a new lance - it might be a fault with the pressure valve. Best take some advice from those that service and sell them.

 

Brill thanks for the advice!

 

did you change the one on the end of the hose bit that goes into the lance ?

 

Yes all o rings!

 

I had a similar issue with water dripping from the gun on my c120 and just replaced that part, picked one up on eBay for £16 brand new posted

 

Not sure if this is the same as yours though https://www.ebay.co.uk/itm/122316125760

 

Not sure if you have resolved your issue or not but both my son's P150's had the same issue and it is actually the intermediate tube that split right along the reinforcing plastic vein. You cant see the split until you put pressure on it like you have experienced.

The past you need is Nilfisk Intermediate Tube G5 Lance 127440051, North West Pressure washer part# 12744005.

 

I will take another look! Thanks buddy

 

Big shout out to North West Power Washers, who sent me a brand new G5 gun for my old P150 to replace the original leaky one, which was 14 years old or so. I called up at about 4pm and it made it to the post that evening and arrived with me at 11 the next day. Great price, speed and quality.