[C38] Holes in boats

Mon Oct 3 11:21:37 EDT 2011

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 <SSmolinske at rainierrubber.com>
> *To:* Catalina 38 Listserve <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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