You need this:
Karcher K series adapter from AutoGeek. Also, when you receive it, you need to be aware it contains a small tube and O-ring that is just held in by gravity before its screwed into the second thing you need, which is this:
This is a 1/4" piece of NPT pipe. It's available from Home Depot in the plumbing department. Another thing you will need is a 1/4"(I believe) female quick release, as unlike other formers, the quick release does not unscrew from your foamer, you you need a female to connect to the male
built into your foamer. That's all you need, is those 3 things. One comes from AutoGeek, the other 2 from Home Depot or Lowes.
So, it will fit like this:
Foamer with 1/4" male quick release ->
1/4" female quick release (with internal/female 1/4" NPT pipe thread on other end) ->
1/4" piece of NPT pip( threaded on both ends/same size): One side screws into female quick realease internal thread/ other side screws into ->
Karcher K series adapter (also has female 1/4" NPT threads). ->
The Karcher adapter goes into your Karcher gun taking the place of the wand. You will not use the wand with a Karcher and a foamer.
Here is a picture of my set up:
It's similar, but I use a MTM Hydro Foamer. The foamer I use came with a quick release, but I chose to remove it to simplify my setup. However, the quick release on your foamer must be utilized, as it's molded into the plastic and can't be removed.
Two important points:
1. The adapter comes with an o ring and spacer inside. Be careful NOT TO let it fall out. Or it may fall out in shipping (it comes from AG in an envelope so it won't be lost)..do not lose either piece (o ring or tube) or the adapter is useless and will leak all over the place. PM me if you have this problem
2. Don't waste your time contacting any pressure washer "experts" or retailers. They will tell you you can not use a foamer (except the Karcher foamer) with this pressure washer. This is just not true. Here is proof:
PM me if you have any problems. All the parts you need will cost about $20.00 ( not including any shipping cost).