If you can thread your pole hose through to the brush, then yes u can. Just connect it all up and feed it through and sort it out at the brush end.
So it connects as such
Pole hose to the bottom of the univalve.
Then pole hose from the top of the univalve, to the brush, whilst leaving the univalve inside the pole. So feed this tube through to the brush (8 - 10inches or so, pending ur gooseneck) trim and connect to your brush as usual. However slide an o ring down to clamp the pole hose where it comes out your pole to the brush so it aids when you tug on the hose.