Questions about installing a second bilge pump

DavidT · 08-19-2009, 07:54 PM

I've been wanting to install a second bilge pump and i was wondering how yall have done it. Do you Y both bilge hoses to the 1 thru hull exit? or do you drill and make a new exit? thanks

angus_cow_doctor · 08-19-2009, 07:55 PM

there are 2 exits on my boat. one pump is mounted slightly higher than the other so they don't compete with each other.

jim t · 08-19-2009, 08:04 PM

I suppose you could put one way check valves just down line of each bilge pump and use a t-fitting to your single thru hull(you'd need a check valve for each pump or the waste water pumping from one would pour back into the bilge through the second pump).

For a true back-up and separate system use a second through hull. It's not tough to do. I recommend a metal thru hull fitting rather than the plastic. depending on how tight your hose is it can apply side pressure to the thru hull fitting and eventually break a plastic one.

A second thru hull is preferred for sure though.

Good Luck,

Jim

DavidT · 08-19-2009, 08:56 PM

not to disagree with your knowledge but i hear that you're not suppose to put valves in the hose because it slows down the flow a lot.

jim t · 08-19-2009, 09:11 PM

Quote:

FO' REEL (8/19/2009)not to disagree with your knowledge but i hear that you're not suppose to put valves in the hose because it slows down the flow a lot.

Sounds good to me... I wouldn't put them in, I ran aseparate thru hull for each of my 3 bilge pumps. I think you gave agood reason to do the extra thru hull.:letsdrink:letsdrink:letsdrink

If you put two pumps on the same hose a lot of the water would simplybackflow to the bilge when one pump runsand the other does not. That's why check valves would be necessary if you wanted to use a single thru hull.

Jim

Patriot · 08-19-2009, 09:38 PM

ABYC Standard for pumps/discharge is 1 discharge for 1 pump. No doubling up. Can run them electrically together for simultaneous operation.

Hope this helps.

Sequoiha · 08-20-2009, 07:56 AM

Hi Tom, welcome aboard, glad to have another professional with good advice on the forum,,,,

Patriot · 08-20-2009, 12:53 PM

Thanks Kenny!!! You still the best!

DavidT · 08-20-2009, 02:00 PM

so i can tap into the existing wires for the new pump? or will i have to run separate wires for both? how hard to make a new bilge exit hole? im sure i can just drill a fit the new thru hull fitting and throw some sealant around it, run the hose, and wire the pump/float and i should be good right?

Tuna Man · 08-20-2009, 02:12 PM

My boat came with (1) one bilge pump..didn't take me long to add another (automatic) and a separate discharge. I had it easy on the instillation of the discharge. Some boats will be tougher. I would NEVER think of running two on one discharge, even with a check valve. FYI if a check valve is ever needed, a washing machine/dish washercheck valve makes for a great one...they are made of nylon and has a free floating ball in them and you can get them free. I used one on my bait well instillation as I have a bilge pump mounted on the outside of the transom for fresh water, to help out with the head lift.

08-19-2009, 07:54 PM	#1
DavidT Asian boy Trigger Join Date: Apr 2008 Location: Pensacola Posts: 230	Questions about installing a second bilge pump I've been wanting to install a second bilge pump and i was wondering how yall have done it. Do you Y both bilge hoses to the 1 thru hull exit? or do you drill and make a new exit? thanks

08-19-2009, 07:55 PM	#2
angus_cow_doctor Senior Member Sailfish Join Date: Apr 2009 Location: Gulf Breeze, Florida Posts: 2,097	RE: Questions about installing a second bilge pump there are 2 exits on my boat. one pump is mounted slightly higher than the other so they don't compete with each other.

08-19-2009, 08:04 PM	#3
jim t Neptune calls me "Daddy" Blue Marlin Join Date: Sep 2007 Posts: 5,231	RE: Questions about installing a second bilge pump I suppose you could put one way check valves just down line of each bilge pump and use a t-fitting to your single thru hull(you'd need a check valve for each pump or the waste water pumping from one would pour back into the bilge through the second pump). For a true back-up and separate system use a second through hull. It's not tough to do. I recommend a metal thru hull fitting rather than the plastic. depending on how tight your hose is it can apply side pressure to the thru hull fitting and eventually break a plastic one. A second thru hull is preferred for sure though. Good Luck, Jim __________________ GO GATORS!!!

08-19-2009, 08:56 PM	#4
DavidT Asian boy Trigger Join Date: Apr 2008 Location: Pensacola Posts: 230	RE: Questions about installing a second bilge pump not to disagree with your knowledge but i hear that you're not suppose to put valves in the hose because it slows down the flow a lot.

08-19-2009, 09:38 PM	#6
Patriot Senior Member Trigger Join Date: Jun 2009 Location: GUlf Breeze/Pensacola Posts: 261	RE: Questions about installing a second bilge pump ABYC Standard for pumps/discharge is 1 discharge for 1 pump. No doubling up. Can run them electrically together for simultaneous operation. Hope this helps. __________________ Tom Kennedy Patriot Yacht Services (850) 261-4312 tom@patriotyachtservices.com www.patriotyachtservices.com Full Service Yacht Repairs, Restorations and Refits Specializing in Awl Grip spray applications Structural Fiberglass Gel coat and non-skid repairs AC/DC electrical / corrosion control Electronics Marine Systems Custom installations and fabrications

08-20-2009, 07:56 AM	#7
Sequoiha Senior Member Sailfish Join Date: Sep 2007 Location: Pensacola Florida Posts: 2,478	RE: Questions about installing a second bilge pump Hi Tom, welcome aboard, glad to have another professional with good advice on the forum,,,, __________________ Kenny Mann Ms Penny Fishing Team Member NRA 172499461 Minn Kota ASC Dealer for The Super Stick www.thesuperstick.com Emerald Coast Marine LLC Allmost Anything Computers 4610 Saufley Field Rd Pensacola Fl, 32526 1-850-456-8196 1-850-455-8318 Sequoiha@cox.net Kenny_Mann-ECM@cox.net

08-20-2009, 12:53 PM	#8
Patriot Senior Member Trigger Join Date: Jun 2009 Location: GUlf Breeze/Pensacola Posts: 261	RE: Questions about installing a second bilge pump Thanks Kenny!!! You still the best! __________________ Tom Kennedy Patriot Yacht Services (850) 261-4312 tom@patriotyachtservices.com www.patriotyachtservices.com Full Service Yacht Repairs, Restorations and Refits Specializing in Awl Grip spray applications Structural Fiberglass Gel coat and non-skid repairs AC/DC electrical / corrosion control Electronics Marine Systems Custom installations and fabrications

08-20-2009, 02:00 PM	#9
DavidT Asian boy Trigger Join Date: Apr 2008 Location: Pensacola Posts: 230	RE: Questions about installing a second bilge pump so i can tap into the existing wires for the new pump? or will i have to run separate wires for both? how hard to make a new bilge exit hole? im sure i can just drill a fit the new thru hull fitting and throw some sealant around it, run the hose, and wire the pump/float and i should be good right?

08-20-2009, 02:12 PM	#10
Tuna Man Senior Member Grand Slam Join Date: Oct 2007 Location: Calera, AL....25 Miles S of Birmingham Posts: 6,581	RE: Questions about installing a second bilge pump My boat came with (1) one bilge pump..didn't take me long to add another (automatic) and a separate discharge. I had it easy on the instillation of the discharge. Some boats will be tougher. I would NEVER think of running two on one discharge, even with a check valve. FYI if a check valve is ever needed, a washing machine/dish washercheck valve makes for a great one...they are made of nylon and has a free floating ball in them and you can get them free. I used one on my bait well instillation as I have a bilge pump mounted on the outside of the transom for fresh water, to help out with the head lift.

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