Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 29-01-2018, 20:06   #1
Registered User

Join Date: Aug 2015
Posts: 66
Smallest automatic bilge pump?

In the book "This Old Boat," author Don Casey recommends using a small, 400 gph or less bilge pump with internal float switch to pump small amounts of water out without draining the batteries. This makes sense to me. Trouble is, I can't find any pump that matches this criteria. They're all too big (higher amp draw) or don't have an integral switch. Anyone know of one?
__________________

Water Dragon is offline   Reply With Quote
Old 30-01-2018, 05:44   #2
Registered User
 
zboss's Avatar

Join Date: Sep 2011
Location: On a boat
Boat: 1987 Cabo Rico 38 #117
Posts: 3,721
Re: Smallest automatic bilge pump?

They donít draw a lot of power for a long time. You would probably never notice the amount drawn over a few days as a portion of your total consumption.

Also, donít waste your money on one with an integral switch. Buy a great switch like the Ultra Junior and a small Rule or Johnson and be done with it. Or just get a whale IC... which has the advantage of being mounted outside of the bilge high and dry with a hose that goes down into the bilge.
__________________

zboss is offline   Reply With Quote
Old 30-01-2018, 06:37   #3
Registered User

Join Date: Dec 2017
Posts: 55
Re: Smallest automatic bilge pump?

Been using the rule full auto for a few years now. Been working great on the ol woody Swiss cheeser. Great little pump, very low consumption, no extra wires and more junk to fail. So much crap in the wooden boat bilge I'm scared to use a floater for it gets junked up easily. Last one gave out after a year and looks like all the oil that escaped to the bilge might be why as the rubber grommet for the wiring was mushed and swollen and let water in. Returned it to west marine under warranty. They also offer an extended warranty makin it a very attractive option $$ wise. We were surprised that it failed even though the ancient one from our first boat is still going strong! Only difference was the oily bilge

Cheers!
IslandHop is offline   Reply With Quote
Old 30-01-2018, 06:40   #4
Senior Cruiser
 
Sailmonkey's Avatar

Cruisers Forum Supporter

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 6,477
Re: Smallest automatic bilge pump?

Quote:
Originally Posted by zboss View Post

Also, donít waste your money on one with an integral switch. Buy a great switch like the Ultra Junior and a small Rule or Johnson and be done with it. Or just get a whale IC... which has the advantage of being mounted outside of the bilge high and dry with a hose that goes down into the bilge.


+1,

Forget about internal switch disposable submersible pumps.

For maintenance work a diaphragm pump (jabsco, whale, shurflo, etc) are much better suited. They donít leak current, last forever, and are able to strip water from the bilge that will leave centrifugal pumps gasping.

Keep a big centrifugal pump mounted higher for big water ingresses.
Sailmonkey is online now   Reply With Quote
Old 30-01-2018, 08:26   #5
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2007
Location: Santa Cruz
Boat: Boatless Again
Posts: 4,554
Re: Smallest automatic bilge pump?

Quote:
Originally Posted by Sailmonkey View Post
+1,

Forget about internal switch disposable submersible pumps.

For maintenance work a diaphragm pump (jabsco, whale, shurflo, etc) are much better suited. They donít leak current, last forever, and are able to strip water from the bilge that will leave centrifugal pumps gasping.

Keep a big centrifugal pump mounted higher for big water ingresses.
+1

Unless you put a stop valve in the exhaust (which creates its own problems), the centrifugal pumps just keep cycling mostly the same water back and forth.
donradcliffe is offline   Reply With Quote
Old 30-01-2018, 09:46   #6
Registered User

Join Date: Sep 2013
Location: Alert Bay, Vancouver Island
Boat: 35ft classic ketch/yawl.
Posts: 1,292
Images: 4
Send a message via Skype™ to roland stockham
Re: Smallest automatic bilge pump?

Depends on your bilge, depth and shape! I Have more than 6ft of lift. Tried a small pump and it just stalled out with no effective output. A 1500 gal worked and gave 2-300g output but did not last. Now gone to an impeller pump and it works much better. The ideal is a single diaphragm pump because of there ability to run dry and not clog but they are really expensive.
roland stockham is offline   Reply With Quote
Old 30-01-2018, 12:43   #7
Registered User
 
Dougtiff's Avatar

Join Date: Jul 2015
Location: San Rafael, Ca.
Boat: Gaff rigged Ketch[Spray]37' on deck
Posts: 283
Re: Smallest automatic bilge pump?

The new generation of RULE bilge pumps have a built in float switch, low profile, can be rotated in many configurations, worth checking out the model # LP900S, draws 4 amps.
Dougtiff is offline   Reply With Quote
Old 30-01-2018, 13:10   #8
Senior Cruiser
 
Sailmonkey's Avatar

Cruisers Forum Supporter

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 6,477
Re: Smallest automatic bilge pump?

Quote:
Originally Posted by Water Dragon View Post
In the book "This Old Boat," author Don Casey recommends using a small, 400 gph or less bilge pump with internal float switch to pump small amounts of water out without draining the batteries. This makes sense to me. Trouble is, I can't find any pump that matches this criteria. They're all too big (higher amp draw) or don't have an integral switch. Anyone know of one?


I also forgot to add that it makes little sense to worry about small amounts of water draining the battery. If there is enough water to drain a battery, no matter the pump size, there are other problems.
Sailmonkey is online now   Reply With Quote
Old 30-01-2018, 13:37   #9
Registered User
 
Colin A's Avatar

Join Date: Mar 2013
Location: East of the river CT
Boat: Oday Mariner 19 , Four Winns Marquis 16 OB, Kingfisher III
Posts: 650
Send a message via Skype™ to Colin A
Re: Smallest automatic bilge pump?

Rule used to make a 350 or 500 called the mate with an attached switch but I don't see it anymore in the catalog. Looks like Johnson makes a 500 that draws 2.5 amps with an available clip on switch.
Bilge Pumps - Cartridge 500-1250 GPH & Ultima Combo 500- 1250 GPH | Johnson Pump - Marine | Product Detail
Looks like attwood still makes the sahara as well
Sahara S500 500 GPH, 12-Volt : Attwood Marine
That said for long term durability as mentioned I much prefer a diaphram pump for moving small amounts of water from a bilge.
I used to replace the tiny 350 and 500 gph pumps quite frequently when I was a tech at a power boat dealer.
__________________
mysite: Colinism.com
Colin A is offline   Reply With Quote
Old 30-01-2018, 16:20   #10
Registered User

Join Date: Nov 2010
Location: BC
Boat: O'Day 40
Posts: 363
Re: Smallest automatic bilge pump?

I put in a Whale Supersub low profile automatic bilge pump. It works fine as a primary pump for small amounts of water but doesn't go a lot lower than the big Rule main pump. I'd like something that goes down to the last 1/4 inch.
__________________
Trying to make new mistakes.
bcboomer is online now   Reply With Quote
Old 31-01-2018, 15:59   #11
Registered User
 
MarkusK's Avatar

Join Date: Feb 2017
Location: Lacolle Quebec
Boat: Tanzer 8.5 #51
Posts: 100
Re: Smallest automatic bilge pump?

Quote:
Originally Posted by bcboomer View Post
I put in a Whale Supersub low profile automatic bilge pump. It works fine as a primary pump for small amounts of water but doesn't go a lot lower than the big Rule main pump. I'd like something that goes down to the last 1/4 inch.
I picked up a brochure from these guys:

Arid Bilge Home

These nano pumps are specifically designed to pick up the last dregs in the bilge. Smallest pump only draws 0.36 A.
__________________
Markus
MarkusK is offline   Reply With Quote
Old 31-01-2018, 16:11   #12
Registered User

Join Date: Nov 2010
Location: BC
Boat: O'Day 40
Posts: 363
Re: Smallest automatic bilge pump?

Holy crap!! Did you see the price?
I'll have to wait to win the lottery and commission a new yacht to spend that much just to eliminate sponging the bilge.
__________________

__________________
Trying to make new mistakes.
bcboomer is online now   Reply With Quote
Reply

Tags
bilge, bilge pump

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
making manual bilge pump automatic boat_alexandra Marine Electronics 4 01-01-2012 08:24
Rule Automatic Bilge Pump Switch #43 endoftheroad Plumbing Systems and Fixtures 13 26-12-2010 15:20
Whale 650 automatic bilge pump electrical issues? brianontheroad Plumbing Systems and Fixtures 0 01-02-2010 17:50
Automatic Bilge Pump Switches? Boomp Construction, Maintenance & Refit 11 26-08-2009 17:23
Custom Automatic Bilge Pump for Dinghy Joe500 Auxiliary Equipment & Dinghy 3 05-05-2009 05:11



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 07:59.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.