salt water washdown pump

seasick

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a little more info would help:)

The biggest issue is the raw water source plumbing. If you have a live well that has a pump connected to a seacock, it may be possible to tap into that water source. One easy way is to swap the livewell pump for a dual outlet model. The second output then connects to a new washdown pump and associated hoses and deck fittings.
Knowing the boat model will help. The electrical can be pretty straightforward if you have a spare breaker/switch position at the helm.
 

seasick

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I suppose the model year would help. Nevertheless is the livewell aft between the aft seats?
Does currently work? If so locate the pump in the bilge and see if it is mounted to a seacock. It may already be a dual outlet type.
 

Hookup1

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I have two Rule baitwell pumps that screw into the thru hull shutoff valves. Both have dual ports. The pump circled in lower right corner you can see the short hose coming out and connecting to the Shurflow washdown pump. The Rule baitwell pump goes to a external baitwell on deck and the Shurflow washdown pump goes to a bulkhead mounted hose connection.

Originally the washdown was connected to this thru hull. I added the dual port baitwell inline. Power for the baitwell pump was added. You can see switch next to last battery switch (bottom).

25 Bait 4.jpeg
 
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Hookup1

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Your wiring reminds me of my angiogram.
I hope your doctor cleaned you up as well as my wiring!

This was still work in progress. The pump wiring in the lower part of the picture has been cleaned up. Because I have so many problems with the Rule baitwell pumps I'm using reusable ty-wraps. I have pumps on board and can change one out in a minute thru the pie plate.
 
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FLWhaler

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My 2003 228 has two thru hulls and the live well is on one and the raw water wash down is on the other.
 

seasick

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My 2003 228 has two thru hulls and the live well is on one and the raw water wash down is on the other.
Separate thrus and seacocks are preferable but if the boat doesn't have a raw water system and therefore no thru hull, it is easier to use one of the existing pickups like the livewell for the source of sea water
Here is an example of a pump with a second takeoff

The livewell connects to the pumps motorized output and the lower fitting with the plug) would be piped to a separate raw water pump
 
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Sea Shift

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I have two Rule baitwell pumps that screw into the thru hull shutoff valves. Both have dual ports. The pump circled in lower right corner you can see the short hose coming out and connecting to the Shurflow washdown pump. The Rule baitwell pump goes to a external baitwell on deck and the Shurflow washdown pump goes to a bulkhead mounted hose connection.

Originally the washdown was connected to this thru hull. I added the dual port baitwell inline. Power for the baitwell pump was added. You can see switch next to last battery switch (bottom).
Hookup, am i seeing this correct? You have a livewell pump which discharges into the intake of your washdown system? That seems genious. More pressure in should make the pump run great? Is that the case?
Also, what model washdown pump are you running?
 

Sardinia306Canyon

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I don't believe that this bait well pump with two exits can be used reasonable as washdown pump as she will not provide reasonable pressure due the impeller construction. A considerable strong washdown pump is a membrane pump what deliver much higher pressure and has a switch to stop the pump if pressure is hold.
Also, i am for safety reasons not at all a fan of seacock mounted pumps as they are mounted usually below water level and if they break off disaster is obvious. They are convenient to install but i consider them as dangerous after i pulled one on the Venture 34 and she disintegrated as soo i tried to unscrew her. So i installed double clamped hose with a T after the highest part of the gooseneck bend and used another pump for the live well.

I used the cheaper Seaflo pumps from Amazon on the 30ft RIB mounted in the bilge area and she hold 4 years, till when i sold the RIB a few weeks ago what is actually a longer time. I have the strongest Seaflo on a 300 gallon water tank on my truck to water the olive trees and she works well too.

I did not used it on that pump but my newly acquired 2011 Canyon had the washdown pump covered with white water resistant grease to protect motor body it from humidity and that works.

If you don't need the live well often then you can either install a Y valve to connect either the live well or the washdown pump or put a T to connect both contemporary.

Chris
 
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Hookup1

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In response to both of the last two posts, one of the 3/4” seacocks has a baitwell pump mounted to it that shares a connection to a separately mounted wash down pump. This does not increase flow to the wash down pump and in fact takes flow away from the wash down pump. As a practical matter though I have plenty of wash down pressure when the baitwell is running. I’m using Rule 1000gph baitwell pump and Sureflo Blaster wash down pump.

Chris’s point about plastic baitwell pump mounted to seacock being a possible sinking hazard if broken off is valid. But this pump setup is in a restricted access area where it is unlikely someone would step on it or something shifted to break it off. Also every GW of this vintage are delivered with one of these Rule pumps installed this way.