[Public-list] Bilge Pump Discharge

[George Dinwiddie]

If I really need to pump a lot of water in a hurry, the electric bilge 
pump is not going to do me any good.  The one I put in (1100 gph, I 
think) trickles a small stream pushing up that hill to the counter under 
the stern.  The one I put in originally (500 gph) would only pump out if 
the battery was charged to max by shorepower.  Normally it only got the 
water within a few inches of the outlet.

BTW, I learned another trick from This Old Boat: reduce the hose from 
the size on the pump down to 1/2" ID.  That way there's less water to 
drain back when the pump shuts off.

  - George

Roger L. Kingsland wrote:
> Thanks George.  I am wondering if, in a pinch when one needs both manual and
> electric pumps operating at maximum efficiency, having a common discharge
> could compromise performance?  Do you agree, or am I splitting hairs?
> 
> Roger
> 
> 
> 
> ----- Original Message ----- 
> From: "George Dinwiddie" <gdinwiddie at alberg30.org>
> To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>
> Sent: Tuesday, July 13, 2004 5:10 PM
> Subject: Re: [Public-list] Bilge Pump Discharge
> 
> 
> 
>>Roger,
>>
>>My bilge pump through-hull is to starboard, and my exhaust outlet is to
>>port.  Until recently, I only had a manual pump, but when I added the
>>electric pump I teed off the same through-hull to avoid putting another
>>hole in the boat.  I used a standard cast-bronze plumbing tee and put
>>the 1/2" hose for the electric pump on the side that's uphill at rest.
>>The 1-1/4" manual pump hose is on the end of the tee, and flows straight
>>down.  I haven't needed any check valve.
>>
>> - George
>>
>>On Tue, Jul 13, 2004 at 03:49:16PM -0400, Roger L. Kingsland wrote:
>>
>>>Thanks Mike,
>>>
>>>Do you have a "Y" at the discharge and does it have check valves to
> 
> prevent
> 
>>>water from one pump flowing the wrong way through the other.
>>>
>>>Roger
>>>
>>>----- Original Message ----- 
>>>From: "Meinhold, Michael J" <MICHAEL.J.MEINHOLD at saic.com>
>>>To: "Alberg 30 Public List -- open to all" <public-list at alberg30.org>
>>>Sent: Tuesday, July 13, 2004 3:22 PM
>>>Subject: RE: [Public-list] Bilge Pump Discharge
>>>
>>>
>>>
>>>>I've got an above-water through hull to port that matches the exhaust
>>>>through hull to starboard. It's connected to the electric and manual
> 
> bilge
> 
>>>>pumps. It looks original to me!?
>>>>
>>>>Mike
>>>>Rinn Duin #272
>>
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>>
> 
> 
> 
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-- 
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   When I remember bygone days                         George Dinwiddie
   I think how evening follows morn;            gdinwiddie at alberg30.org
   So many I loved were not yet dead,           http://www.Alberg30.org
   So many I love were not yet born.
                                             'The Middle' by Ogden Nash
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