So sorry, missed your message. Yes, just spray with good pressure from garden hose, no need to brush. It is a bit more involved than backwash for sure, but it is only done once every 6-12 months, unlike backwash which is almost every week or every second week, and it should take you about 10-20 minutes max. Also, media backwashable filters are 40 microns at best, this cartridge filter is 5 microns. Unfortunately cartridge filters are not backwashable. I know that there are few companies that claim that you can backwash, but it's not true, by backwashing a cartridge it gets damaged.

As requested, some photos of installation. One attached to the wall, the other one is using custom FRP stand where there was no possibility to attach to the wall: