Underwater pressure washing - GIF

**Jon** · Jan 19, 2021, 02:55 PM

Underwater pressure washing.

Previously:

APS underwater rifle - photo
Underwater chainsaw - video
Cleaning an underwater data center - GIF
Underwater pipe and pile cutter - GIF
Underwater arc cutting - GIF
Underwater digging water jet - GIF
Underwater rock blasting for dredging - GIF
Underwater power tools - GIF
Tank drives underwater - GIF

**IntheGroove** · Jan 19, 2021, 05:07 PM

Crusty 280 Volvo Penta...

**trigger** · Jan 19, 2021, 07:21 PM

Wonder what pressure they using,I have tried that with my little 160 bar washer and gave it up as it way to slow so it was back to scraper and brush

**IntheGroove** · Jan 19, 2021, 11:01 PM

An outfit called CaviDyne seems to have the technology for underwater pressure cleaning...

**Hoosiersmoker** · Jan 20, 2021, 06:15 AM

Looks like a spiral blasting nozzle but hard to tell under water.

**Moby Duck** · Jan 24, 2021, 02:44 AM

Wouldn’t do the shaft seal much good.
Can’t be UHP, lance is too short, Heath and Safety specify minimum lance lengths to make it impossible to shoot yourself in the foot with both hands on the gun.

**trigger** · Jan 24, 2021, 07:00 PM

After looking at Cavidyne,put a rotating nozzle on the gun after cutting it down to just pistol grip size.
Pushed the pressure up to about 180 bar ( most prob kill the motor now) and gave it a test .Most light fouling is removed easily but barnacle growth still too stubborn ,now thinking to inject a flow of air into the waterjet to assist in the process as it seems cavitation is the key.