raw water washdown system
- Thread starter haliman
- Start date
starcrafttom
Active member
I had one of these for a couple of years but it eventually succumbed to the salt. I put on a different plastic spray nozzle that worked better. It produced enough water pressure to get the job done. Maybe I’ll get another to replace the plastic bucket, yea let’s spend some more spring boat fever money….I think perhaps I will. Also, if you have a scotty or similar power port just attach the appropriate plug to the pump.
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starcrafttom":3dg971jd said:
I have the same one, getting ready to install here in the next week. took it off my old boat and really have nothing bad to say about it works good.
any chance up throwing up your instal pics? on my last boat I mounted under splash well, ran good flexed tube to a male/female 90 out the top back of the transom(out of the wood) and drop down below water line and secured it to transom. been kicking around different ideas but don't really want do a below water pickup through transom due to fear of water damage.....
starcrafttom
Active member
My install is different then the typical install as I have a 27. I did mount the pump under a panel under the gunnel near the back of the deck. From the pump I was able to drill a hole thru the hull above the water line and in pure glass. On the other side of the pump I installed a quick disconnect and one of those curly hoses. It works really well expect that I sometimes get air lock and have to hand prime the hose. Still working on a fix for that.
We had a factory installed raw water wash down. Since I'm not found of thru hulls, I had it glassed over. I used the wash down pump but connected the pickup to a hose to it with a strainer. Thanks (Pacific Wander) I throw it over or can use it as a back up bilge pump or pump out a dink etc. I retained the off on switch and the hose connection. It's nice to use when winterizing as I fill a cut opened milk container with RV anti freeze and put the pick up in the container and turn the pump on and connect a hose to the hose connector and pump it into my water tank and run my sink pump until I see the pink stuff. It does it pretty quickly. Handy coming home fro Florida to still freezing temps. Can do this in less 5 minutes in a rest area.
D.D.
Salmon Fisher
Member
I have one in the garage, like Tom's, and will install like Jake said. I saw this on the Arima Owners website. I like it because when returning home, I can put an extension on the pick up hose over the transom and stick in a bucket of fresh water and run all the salt out. Figure this will extend the life of the pump. I have to confess, I bought it last spring and didn't get to it yet. 
I will get 'er done this spring.
I will get 'er done this spring.breausaw":1qzv9ixg said:I use a plastic bucket with line attached, small one for little jobs, and large one for bigger jobs.
Same here, except it's just one bucket. KISS. We bought a new collapsible bucket last summer on close out at a marine store. Have not used it yet, but it will be our "new & improved" system. :wink:
I've used a collapsible canvas bucket for 30 years (same one!) and like it. I don't plan to do a raw water washdown but easy to do if you want.
You need a proper thru hull fitting with valve to a basket strainer and then hose to a hose bib in the cockpit. Switch nearby.
Google "raw water washdown system" and you'll get the basics from The Hull Truth and Powerboat TV.
The best place for the thru hull is likely near the bilge sump in the back of the 19. The hardest part of the job will be taking a hole saw to the bottom of your boat. Be sure you have easy access to the valve.
As always, once the hole is cut if core material is present, do the undercut and epoxy fill as discussed in many threads. Install thru hull with marine sealant and ball valve and marine hose up to an easy access strainer and plumb there to where you want a hose attachment plate. All available at WM or Defender etc. I like to see a good heavy duty rocker switch you can use hands free. Ie somewhere that you can hip or knee it on or off if you're cleaning fish etc.
You need a proper thru hull fitting with valve to a basket strainer and then hose to a hose bib in the cockpit. Switch nearby.
Google "raw water washdown system" and you'll get the basics from The Hull Truth and Powerboat TV.
The best place for the thru hull is likely near the bilge sump in the back of the 19. The hardest part of the job will be taking a hole saw to the bottom of your boat. Be sure you have easy access to the valve.
As always, once the hole is cut if core material is present, do the undercut and epoxy fill as discussed in many threads. Install thru hull with marine sealant and ball valve and marine hose up to an easy access strainer and plumb there to where you want a hose attachment plate. All available at WM or Defender etc. I like to see a good heavy duty rocker switch you can use hands free. Ie somewhere that you can hip or knee it on or off if you're cleaning fish etc.
You needn't do a below the waterline through hull for this project. On our Tomcat, Carl at EQ installed the washdown pump using a through hull above the water line a PVC pipe to get down below the water. Here's the only image I have of the install. The approximate position of the water line is indicated by the black bottom paint. The PVC pipe comes out through the transom into a 90 degree bend and then passes down the back side of the sponson. He drilled a few holes in the side of the pipe so that it will still draw water if a piece of kelp or something gets drawn onto the end of the pipe. It's a pretty simple idea and you should be able to do a similar install on a 22 or 25.
on the last two boats I have had i did not have to go into the water line. on my pump there is a strainer on the intake there so no need to strain at initial pick up. also we use the good reinforced clear tubing from HD to run out the back of transom. also on the end of that i attached a quick disconnect hose fitting so I could hook up hose to intake turn pump on and flush out. will be installing this weekend. I do however really like the wash down hose hook up on the will-c where do you pick one of those up at? already have a blue sea 4 switch I am putting in cockpit as well
The hose is a heavy duty bilge pump hose from www.defender.com The strainer is a part number 50016 also from Defender listed under plumbing and bilge pump strainers. It required some creative adapters, maybe from Home Depot to get from the bilge hose to the pickup strainer.
D.D.
D.D.
Thanks all for the replies. I bought the Johnson Aqua Jet 5.2 GPH washdown kit.
Will get Groco bronze thru hull, flange and ball valve, appropriate hoses, etc. Will do the thru hull next to the bilge pump as Northwest Marine recommends. As far as the hole saw, plan is to put painters tape bottom of hull before drilling ,drill a pilot hole of course then hole saw. As far as using PVC for that set-up on the Tomcat, seems kind of sketchy but I am not a pro at this so what do I know. Will PVC hold up in a marine environment over years?
Will get Groco bronze thru hull, flange and ball valve, appropriate hoses, etc. Will do the thru hull next to the bilge pump as Northwest Marine recommends. As far as the hole saw, plan is to put painters tape bottom of hull before drilling ,drill a pilot hole of course then hole saw. As far as using PVC for that set-up on the Tomcat, seems kind of sketchy but I am not a pro at this so what do I know. Will PVC hold up in a marine environment over years?
It will hold up for many years and in the rare event that it breaks or cracks, it's easily replaceable with a purchase from any hardware store. IMHO, it's far less worrisome than a below the water line through hull. E.g. if the PVC breaks, my raw water washdown quits working but water doesn't come into the boat. With a below water through hull, if the valve is left open and the tubing on the inside of the boat fails, water comes in. But either system will work if properly installed, operated and maintained.haliman":3nmpmuv9 said:
journey on
New member
I'm kind of curious as to why holes through the hull is a bad thing. All the boats I've had had through hull fittings, with valves. None of them ever leaked, though I had to replace a couple of Forespar Marelon valves ( composite reinforced polymer ) which froze up. And I did that with the boat in the water.
So what's wrong with a through hull? Honest question. Assuming you use good bronze stuff.
On Journey On, the washdown pump shares the through hull that services the marine head. Works great, the pump works as a shut-off valve both for the intake and outlet.
Boris
So what's wrong with a through hull? Honest question. Assuming you use good bronze stuff.
On Journey On, the washdown pump shares the through hull that services the marine head. Works great, the pump works as a shut-off valve both for the intake and outlet.
Boris