If your hose connection looks like this you do not need any adapter:
These bargain bin and auto part store applicators do no good when spreading a coat of wax over a freshly detailed painted surface
Designed for a wide range of surfaces
this kit gives you what you need to adapt this better trigger to fir a Karcher K series
With Total Interior Car Cleaning Wipes
Wax On Wax Off Kit - With our Best Wax Cloths & Accessories If your hose connection looksNot Just for waxes. This is what you need to apply a Wax, Glaze or Sealant by hand, wait then buff off by hand. The show starter applicators are great to apply with, use a fresh one for each product, this kit comes with 2, so that's enough for say a glaze like blacklight and a wax like Enhanced Wax, Jetseal or butter wet . If you want to apply 3 layers, like a glaze, sealants or waxes then get 2 kits. The applicators are foam wrapped in microfiber