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-   -   Want to install a wash down pump (https://www.thehulltruth.com/boating-forum/987473-want-install-wash-down-pump.html)

natenez 02-11-2019 06:02 PM

Want to install a wash down pump
 
i have a 19í open aluminum jet sled, and I want to install a wash down pump in it this year. Have a few questions.

first, does anyone have a recommendation for make/model for the pump? Reviews Iíve seen online are generally negative.

second, Iíve been told to put the through hull in the transom, near the drain plug. And to use a plastic through hull fitting. Does that seem right?

third, should I put a seacock on the through hull? If so how is that done, since the through hull hitting looks like it is designed to take a plastic hose not another component?

what type of plastic hose to run between through hull and pump?

anything else I need or should be aware of?

thanks much

Island Marine Group 02-11-2019 07:11 PM


Originally Posted by natenez (Post 12234740)
i have a 19í open aluminum jet sled, and I want to install a wash down pump in it this year. Have a few questions.

first, does anyone have a recommendation for make/model for the pump? Reviews Iíve seen online are generally negative.

second, Iíve been told to put the through hull in the transom, near the drain plug. And to use a plastic through hull fitting. Does that seem right?

third, should I put a seacock on the through hull? If so how is that done, since the through hull hitting looks like it is designed to take a plastic hose not another component?

what type of plastic hose to run between through hull and pump?

anything else I need or should be aware of?

thanks much

I can't recommend one pump over another.
Plastic fitting because if you use a metal one on an aluminum hull, it may cause galvanic corrosion.
You should have a sea cock to shut off any thru hull penetration below the waterline. If it were my boat, I'd buy the whole thru hull and valve setup from Forespar.
Search the threads here to learn about not mixing different thread types. Thru hulls have straight threads so the flange nut can travel the entire length. Ball haves have tapered threads. The don't mix. You can install a thread to barb fitting in the valve and attach a good quality hose to it and mount the pump up higher. This type of pump will self prime. Ask the person at West marine to recommend the hose. Get all stainless steel clamps. Some have steel screws that rust. If a magnet sticks to them, then they're not the proper stainless alloy.
Piece of cake.


barrell 02-12-2019 06:38 AM

I dont see how mounting in transom will pick up any water when you are on plane. Pickup should be through bottom of boat. Watch location doesnt send turbulence to your transducer.

Reachport 02-12-2019 06:50 AM

I agree with the suggestion about location by barrell, but I would not know if an aluminum hull is conducive to a hole being punched through it. Sounds scary.

Besides, without scuppers, your washdown will flood the boat with no water exit in sight. I would stick to a hose from the dock.

Roger rodbolt 02-12-2019 12:05 PM


https://cimg7.ibsrv.net/gimg/www.the...a510cc5f7.jpeg
Holes in wood, fiberglass or composite vessels are more likely to cause problems then an aluminum hull/transom. For wash down and live well inlets I prefer welding in aluminum tubing, brace welded and extended above the water line. Makes a permanent solution and is safe. The pic attached is an example from another forumó not my boat.

For a jet boat Iíd do a transom or bow/bottom intake depending on where you will mount the pump and outlet. Both will be out of the water while on step if that matters.

mystery 02-12-2019 12:36 PM


Originally Posted by natenez (Post 12234740)
i have a 19í open aluminum jet sled, and I want to install a wash down pump in it this year. Have a few questions.

first, does anyone have a recommendation for make/model for the pump? Reviews Iíve seen online are generally negative.

second, Iíve been told to put the through hull in the transom, near the drain plug. And to use a plastic through hull fitting. Does that seem right?

third, should I put a seacock on the through hull? If so how is that done, since the through hull hitting looks like it is designed to take a plastic hose not another component?

what type of plastic hose to run between through hull and pump?

anything else I need or should be aware of?

thanks much

you want saltwater or freshwater or both ?

wdlfbio 02-12-2019 01:06 PM

Drill hole in the bottom, weld in aluminum pickup with threaded end (inside the boat). You can actually weld a 1/2 bead just aft of the pickup hole to help force water into the intake while yupoir are running. As said, make sure it’s not in a place that will ,easy with your transducer. Mount seacock to the threads. Putting a hole in the bottom without a seacock is a terrible idea. Mount pump to seacock.


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