I'm about to drill holes into the bottom of my boat and need advice...

[killerbren]

Hi guys,

I am just getting everything ready and marked to start drilling holes into the bottom of the boat for a ballast install. I need 3 pumps here, and I think I have it set up pretty good, just need your opinion.



The pumps I'm concerned about is the two bottom ones on a "T". They are going to feed my rear port and starboard sacs. The one on the left of the T has a slight upward angle to the pump, then the outlet will be turned upwards slightly, then the hose will go up from there. I don't think I will have any troubles with this pump. The pump on the right however, due to the slope of the hull, has a slight down angle to the black 90, then an upwards angle to the pump. The output will be pointed up slightly and the hose will have an upward slope.

Will I have troubles with that pump on the right side? I'm thinking all of the air bubbles in the T will move towards the left pump and out. I just want to double check and see if I'm missing anything. These pumps will sit about .75" lower after the Thru hull is installed so I can turn them a little bit further up than they are set now, but that T is always going to have a slight downward slope if I set it up like this.

Thanks, I don't want to screw this step up.

[Jetdriver]

I think the T pump setup should be good. Like you said the water will push out any air. The problem comes to play when you go up then down then up again, air gets trapped. If your 06 VE is like my 07 VE the speed sensor(paddle wheel) is right behind where that single pump is sitting. I've heard that a thru hull that close and in front of it can screw that up. What if you faced the manifold and 2 pumps towards the starboard stringer and put the second thru hull to the right of it? You can route the hose any which way you need to.

[killerbren]

I thought of that single pump messing with the paddle wheel. I installed the Nautic laugic GPS this spring so as of now my paddle wheel is pretty much a non issue. I am still thinking about the depth finder though, but that thru hull is a good 3 feet in front of the depth finder/paddle wheel so I don't think it is going to mess with it that much. Should I reconsider?

I think I'm going to take that single pump and put it on a 90 degree fitting so I can get it horizontal and get the pipe heading towards the bow from the get go.

I looked at pointing the two pumps straight starboard, but I think it didn't leave a whole lot of room between the pumps and the floor. I am able to get the pumps turned up more with the way they sit now because the left one is under the seat and clear of the floor while the right one is a little bit under the floor and the hose can go upwards under the seat.

[Jetdriver]

Nice. I can't think of a reason why the depth sounder would be affected but I could be wrong. How are you liking the nautic logic GPS? What all does that involve? I'm wondering if that would improve my speedset. It slows quite a bit when I corner hard. Perfect pass it is not.

[chpthril]

Heres a 22ve with a similar setup, except 2 T800 pumps for the bow sacs rather than a single 1200 for a single bow sac. As you have it mocked up now, any air on the right pump, which is lower, will move towards to the left pump as its higher. You will want to orient the pump outlets so they are at the 12 oclock position rather then the 9 or 3 as they are currently in the pick. Plenty of room to turn the 90's toward the STBD stringer. Or, take one of the 90's and us it on the single T1200 and have one of the 1200 going direct into the T fitting and the other 1200 on a 90 in the T

The main thing is to keep that upward travel all the way from the thru-hull to the pump outlet. The exception being two pumps in a T. As long as one of them maintains that upward travel, you are good.

[Dandy]

Below is a link to the install that Chp did with more pics of that 22Ve including some hose routing.
http://www.tigeowners.com/forum/show...-Ballast/page2
(oddly, I get a feeling that the boat in this thread is the one that we are purchasing...will wait for delivery to see)

[killerbren]

I tried to point the two pumps straight starboard like the picture, but there is no way it will work in my boat. I think it has to do with the different v-drive (or the fittings) because when I set it there the pumps are sitting well higher than the floor.

I modified it a bit and think I know what I'm going to do. I took a 90 degree off one pump and put it on the other thru hull.



That pump on the right still has a downward angle to it, but with this configuration I am able to point the pump discharges straight up. There is also quite a bit more room to work with.

The pump to the back left has a good upward angle to it, and I like how the discharge is set.

[Jetdriver]

DRILL IT!!

[tigeunrest]

I used the 1600gps pumps from Mike. Just to prevent any problems I would make sure that pump is turned slightly up. I had mine installed and had to reposition them because they would airlock 50% of the time. I had to detach the hose at the sack and siphon it to get it to start.
After the first hole all the rest are easy

[killerbren]

DRILL IT!!

OK! be right back........

[killerbren]

OK, done, all 6 holes drilled, cleaned up with a dremel, and thru hulls dry fitted.

I took a bunch of pics, I will start my own ballast install thread tomorrow.

[BCRider]

If you need to gain space you can always put a 90 on the thru hull first before the ball valve. It will also allow you to position the pumps in almost any spot you'd like.

[Talakeda]

are the pumps better to be on their side as you have or straight up....or does it matter? im asking for a prime concern

[chpthril]

Talakeda,

Two things matter most; Pump needs to be below the water line and the that the flow of intake water make a continuous up hill travel from the thru-hull to the pump outlet. Outlet hose also needs to continue up hill. Letting it dip below the pump can crate a tap.

[IDBoating]

Imagine yourself as a bubble somewhere between the thruhull and the pump's outlet hose. With the pump off, would such a bubble naturally float up and out of the whole system? Or would it find a "high spot" somewhere and get trapped there? You must prevent a bubble from finding a place to get trapped. This is accomplished by making certain the path from the thruhull, through the valve, through the pump, and out the outlet hose is continuously "rising" with no "dips" anywhere along the way. This is also why people here point out that the pump's outlet must be ABOVE its inlet, because air can get trapped within the pump itself just like it can get trapped in the hose along the way.