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Author Topic:   Washdown system on newer boats
DeepSouthWhaler posted 06-19-2006 11:54 AM ET (US)   Profile for DeepSouthWhaler  
Has anyone installed a raw water washdown pump on their boat? I want to install one on my 18 Dauntless. I would like to know on the type of pump and the fittings that were used and the installation process.
tmatt posted 06-20-2006 08:59 AM ET (US)     Profile for tmatt  Send Email to tmatt     
While I have not installed a wash-down pump I do have that option on my '05 18 Dauntless. Perhaps I can offer some insight into the setup.

Since I have the Livewell in the RPS, the raw water washdown pump gets the water from the intake side of that livewell pump. (I think there is a knockout on the intake of that pump where you can connect a fitting, or you could just install a T fitting on the intake side of your livewell pump to get the raw water.) You shouldn't have to install a new through-hull fitting.

I'm not sure of the tubing used in plumbing between the pumps and fittings...I try to give it a look the next time I have the boat out.

My pump is mounted under the aft starboard hatch (below, where my battery & other items are mounted) against the inside of the starboard hull. From there, the output of the pump is run to a stainless-steel hose-bib fitting on the starboard side of the engine splash-well. I just screw on a 15' coil hose w/nozzle when I use it.

It is wired to one of my accessory switches on the dash. I believe all the raw-water washdown pumps on the market work with a pressure switch. Once the system is pressurized, the pump shuts down until you start the water spray. When the pump sees the pressure drop, it kicks in and delivers water until you shut-off the nozzle.

I've been very happy that I have it...comes in real handy when fishing & for spraying down footprints before they set in the non-skid.

Let me know if I can be of anymore help.


tmatt posted 06-20-2006 09:01 AM ET (US)     Profile for tmatt  Send Email to tmatt     
Oh, one more thing. You should be able to go on and get the drawings for your boat that will show the exact mounting locations for the raw-water washdown option. This can come in handy when deciding where/how to mount things.


DeepSouthWhaler posted 06-20-2006 01:42 PM ET (US)     Profile for DeepSouthWhaler    
Thanks for the information. My Dauntless is a 1999 model. I don't think a washdown pump was any option back then. I do however have a spare throughhull fitting with a seacock already on the boat. This was used as a drain for the fish box in the removable rear storage box/seat. The newer models have this integrated into the deck. I will probably mount the pump and the outlet in the same area that you talked about. I also have a spare accessory switch on the console so I will just run the wires to that switch.
Whaler_bob posted 06-20-2006 02:02 PM ET (US)     Profile for Whaler_bob    
Most modern washdown pumps use 3/4" ID hoses which use a supplied quick connect to the pump housing. If your pump doesn't come with a intake strainer- buy one. My intake is on the transom (21ft Seaswirl Striper) so a soon as I'm over 7mph or so... it stops working. I soak the deck down good, then once the bow comes up to plane, all the dirty water goes out the transom scuppers. I have a 3/4" ID brass 1/4 turn shutoff valve threaded directly to the salt water intake thru-hull fittings for the washdown pump and for the livewell pump just in case a hose bursts.

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