Unfortunately this MTM foamer attachment is not compatible with any of the residential grade electric machines, regardless of brand. MTM is working on an adapter for the Karcher machines but it is not out yet. There is a Campbell Hausfeld model CP5101 that this foamer would work with. Also, the prosumer or professional models with a quick connect spray lance on them are also compatible with this foamer.
If you wanted to keep the price down but yet still have a foamer attachment, you could purchase the Karcher machine and then purchase the Karcher foamer bottle.
I am posting a link below to the Karcher foamer attachment that we carry. Unfortunately Campbell Hausfeld does NOT have a foamer attachment for their electric residential grade machines.
See below:
Karcher Foamer Attachment