I have a friend that bought one from northern tool and used it maybe 2 or 3 times then it would not work anymore. I looked at it and the orifice inside it was extremely rusted and I think that is why it would not work. I told him to call vendors to see if they can get that orifice to change out.
He ordered an X-Jet to try out and it came in last week and called me Friday and said the X-Jet not only shoots much further but stronger concentration.
I have a few X-Jets and they are not only great but the quality of stainless steel they use is the best. I did an apartment complex and forgot to rinse out the X-Jet afterwards and it sat for about 2 years in storage. I looked at it last year and the stainless steel plug was crumbling apart and I had to use a remover to get the rest of it out of the X-Jet threads so I could put a new plug in there. I looked inside the X-Jet to see the orifice and it was a little dirty but in good shape. I used it a week later and it worked great.
I don't use them often but it is a good tool to have.