You will likely ruin your anti fouling paint if you attempt this, whether you have hard or ablative paint. Pressure washers should never be used to clean painted surfaces underwater. The reason is that in order to overcome the ambient pressure of the water surrounding the hull, you will have to have the wand tip extremely close to the surface being cleaned. At the distance we are talking about, the pressure of the water being emmitted from the wand is very high and uncontrollable. You will blast the paint off your hull.Pressure washing the bottom in-water. Any info on an wantxextension to do this?
I think you will find the pressure washer is pretty much ineffective at any safe distance underwater. Again, you will have to get the wand tip right up on the surface of the hull before it will remove fouling growth. A distance so close that you will be unable to keep from removing paint as well.What distance did you have in mind? I was thinking that a depth of up to three feet pressure was about 16 psi.
If this worked the pros would use it, don't you think? There are few things more tiring than hand cleaning a hull in scuba gear.What distance did you have in mind? I was thinking that a depth of up to three feet pressure was about 16 psi.
Hey, rationalize all you want, but what I'm telling you is based on over 19 years of professional hull cleaning experience. But it's your boat and your dime. Let us know how it works out for you if you go forward with this.Right. Assuming the pressure washer is operated with a tip to give 800 to 1200 PSI it appears that a washer submerged with 16 psi of sea back pressure isn't significantly different than operating a washer out of water with no back pressure. For house paint you pick a the nozzle tip to avoid removing paint from too high a pressure. Seems like that would be the same underwater with a hard paint.
That page doesn't really define what "soft" is beyond what the manufacturers say. Anything sold as ablative counts as soft as far as the state is concerned.FYI
Wash. Dept of Ecology allows in water bottom cleaning for "hard" bottom paints. The details on what it considers to be "hard" is on thier website: Hull Cleaning and Boat Washing | Clean Green Boating | Washington State Department of Ecology
Some marinas, maybe Edmonds, apply restrictions beyond what DoE requires.
Alex--That page doesn't really define what "soft" is beyond what the manufacturers say. Anything sold as ablative counts as soft as far as the state is concerned.
There are certainly lots of devices that one can find for cleaning the bottom from the dock. Most look like a long pole with a dogleg halfway down and some sort of sponge at the end.
I have Micron 66, so no in water cleaning for me. I'd be curious to know what hard paints people are getting 2-3 year service out of in Puget Sound.