Royobi and Ozito both have 2 types of fittings, and no clear guide as to which models have which fittings, so you need to check your machine to be sure.  If you get it wrong it's no problem to swap, but to help get it right first time we have measured the fittings so you can check yours.

We will also add more detail as we hear back from customers which adapter fitted their model, so over time it will get easier!

Hose Adapters for Royobi and Ozito:

Adapters to connect the M22 Rockcar Green flexible hose to a Royobi water blaster, you will need a male adapter, either #2 or #5.  

Here is a guide:

Older models are normally #2, newer models are normally #5

Links:: 

#2 male hose fitting adapter for older Royobi and Ozito water blasters

#5 male hose fitting adapter for newer Royobi and Ozito water blasters

So far we know:

#5 fits:

Jason and Branden have both confirmed #5 fits this machine, thanks guys, and thanks for the photos!

Connections to the Trigger to fit foam cannons etc:

Again, Karcher and Ozito have 2 fittings, please check yours before ordering, here is a photo sent in by Scott (thanks Scott), that shows both types.  The top brass fitting is what nearly all Royobi had.  Sometime in 2025 in New Zealand some machines started to have a different shorter fitting like the black fitting in the photo.

We have adapters for both, this is a lot easier to see the difference so please check your machine before ordering.

If your fitting looks like the top one you'll want this one.

If your fitting is like the bottom shorter one you'll want this fitting 

The bottom short adapter fits: