[C38] Holes in boats

Mon Oct 3 11:25:43 EDT 2011

Max, I have backflow at the sink with the current Rule 1000,  I solved
the problem by putting a ball valve between the through hull  and the
sink.  Where were you planning on installing the sump below 

From: listserve-bounces at catalina38.org
[mailto:listserve-bounces at catalina38.org] On Behalf Of Max Soto
Sent: Monday, October 03, 2011 8:22 AM
To: Catalina 38 Listserve
Subject: Re: [C38] Holes in boats

Jeffry, Everyone that shares interest for the C38 is welcomed here!!

Steve, if the shower sump pump discharges on the head sink thruhull, if
you put a bigger pump, you might be getting backflow on the sink.

I was planning to remove the pump and install drain that leads to a real
shower sump on the bilge like the one on the link. This will also help a
lot with the soapy water odors..     

http://www.defender.com/product.jsp?path=-1|51|26832|319659&id=680799

Chuck, I hate to use check valves. The original bilge pumps thru hull on
the stern is now for the manual bige pump only. I installed  two  more
thruhulls, one on each side, both at same level  (higher the exhaust and
manual pump thruhulls) for my bilge pumps. I have a 1500 primary and a
2000 secondary on the bilge, plus a high alarm system.

Hope this helps, Max

2011/10/3 Chuck Finn <charles at finn.ws>

Holes in boats... everybody's nightmare!

One of the problems I found with our bilge pumping setup is the long
hose and size.   I have a 2000 as well and get quite a bit of head
pressure.  I am planning on replacing the hose with a smooth bore hose
that resists pinching and kinking.  I currently have two pumps working
through the one hose, which does not increase volume but does ensure
against pump failure.  I am considering plumbing the second pump
(located forward of the shower sump, which I have disconnected and put
the starting battery in) to a separate overboard hole.  The only thing
stopping me is actually selecting where I am going to drill that second
hole...  Probably the best place would be high on the port side,
possibly following the path of the holding tank vent and then out the
side.....

Anybody have a better idea?

Chuck Finn
Mighty Quinn,  #114
Great Lakes

On 10/3/2011 2:49 AM, Jeffry Matzdorff wrote: 

Hope the listserve doesn't mind me 'hanging around' and occasionally
commenting.  Fact is, this listserve is really awesome.  

You guys know your stuff and the emails are filled with lots of really
spot on advise for others.

Steve, this is an excellent point below. Brilliant idea to increase the
output of the shower sump with a bigger pump.

Other types of hull breaches such as losing a shaft or being holed by
various objects are always possible.

I lost a though hull bringing up a boat from Baja several years ago.  It
was 0200 and a very rough, dark night. 

Between the lag time of not knowing you have a problem, and the frantic
tearing up of floor boards or getting a diaper over it from the outside
will take many minutes.

High water alarms are great and like you point out, secondary pumps are
always a good idea.

I have a y-valve on my big bilge pump and an 8' hose attached which I
can move around and get water out when I am heeled over.

Cheers~

Captain Jeffry Matzdorff
323.855.0191
www.offshoredeliveryskipper.com

	----- Original Message ----- 

	From: Steve Smolinske <mailto:SSmolinske at rainierrubber.com>  

	To: Catalina 38 Listserve <mailto:listserve at catalina38.org>  

	Sent: Sunday, October 02, 2011 9:59 PM

	Subject: [C38] Holes in boats

	During the planning stage of one of my current projects (putting
a sump in the shower sump, when we have a full crew we can never get the
sump emptied and there is always "liguid" left sloshing and the current
design just doesnt get all of it out, especailly bad on starboard tack)
.  I got the idea to beef up the shower sump with an much larger than
needed bilge pump so that in the event that we ever were taking on water
we would have another higher capacity pump than the one that is
currently installed.  Since Im cutting in the new sump hole its easy
enough to make sure things will fit.   

	This thought process raised the question of how the capacity of
my current bilge pump stands up against say a failed through hull (hull
damage a whole different story)   I searched and searched the net until
I found the following link that shows the amount of water at different
head levels that comes into a boat through different sized holes.    Eye
opening to realize that depending on the circumstance and which through
hull failed I could loose my boat.   

	I have a Rule 2000 in the bilge, thats 33 gallons a minute,  a
failed 1" through hull at 2' head level pumps in 28 gallons per minute,
interpolating to a 1 1/2" through hull the amount of water coming in is
70 gpm.  If you have never removed your knot meter in the water, try it
some time it is amazing the amount of water that fills the bilge before
you get the cap on the opening.   Thought I would pass this link along
so you can have the information for you own calculations.     

	http://www.tpub.com/content/advancement/14145/css/14145_191.htm

	Steve

	#312 Peregrine

	Seattle

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-- 
Max Soto
C38 #198 ESTANCIA
Puntarenas, Costa Rica

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