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Catalina/Capri 25/250 Sailor's Forums

Catalina 25 Specific Forum

thru hull or to hull

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ddlyle
Captain

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302 Posts

Initially Posted - 04/27/2003 : 09:52:34

I have an '86 that is in pretty nice shape.
I'm painting the hull today (Trinidad SR - blue).
But how do I tell by looking if I have the to-hulls or thru-hulls?
I have two (sink in head and galley). Both inside and outside the boat the hull looks like new around where the thru/to hulls are.
Nice hard and solid fiberglass, very smooth and even surface.
Thanks.

Cap'n Dave
Sailing The Blues
1986 C25 sr/sk #5413

Edited by - on

dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 04/27/2003 : 10:20:53

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>But how do I tell by looking if I have the to-hulls or thru-hulls?<hr height=1 noshade id=quote></BLOCKQUOTE id=quote>

Cap'n Dave,

The "to-hulls" are a glassed in pipe and, from the outside hull surface, look just like a pinky sized hole that is smooth to the surface. On the inside, it looks like a fiberglass volcano with a valve on top.

To Hull(Inside)
<img src="http://home.attbi.com/~c25sailor/images/tohull3.JPG" border=0>
To Hull(Outside)
<img src="http://home.attbi.com/~c25sailor/images/tohull1.JPG" border=0>

The "through hulls" are an actual fitting with pieces that are screwed together from both inside and outside. You should see and feel the fitting on the outside of the hull.

Through Hull(Outside)
<img src="http://im1.shutterfly.com/procserv/47b2dd04b3127cce9d4cdf90ce590000005610" border=0>
Through Hull(Inside)
<img src="http://im1.shutterfly.com/procserv/47b2dd00b3127cce9d5f160f0d0a0000005610" border=0>

<img src="http://www.catalina25-250.org/c25sm.gif" border=0>Don Lucier<img src="http://www.catalina25-250.org/c25sm.gif" border=0>
<img src="http://im1.shutterfly.com/procserv/47b2d904b3127cce9f7cd9ffdf1d0000003010" border=0>
North Star SR/FK

Edited by - dlucier on 04/27/2003 10:23:49

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H20boy
1st Mate

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USA
31 Posts

Response Posted - 04/27/2003 : 11:23:46

NOW I have a question also....are all the to/thru hulls located in the same place , or are they different per boat? I have a 79 that seems fine, but would like to know more.

Rick Price
"79" 25' SK/Standard
Hull # 1237
Tacoma, Wa

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Dave B
Admiral

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Mali
863 Posts

Response Posted - 04/27/2003 : 18:39:47

Hi Cap'n... Simple answer: In 1986, they were thru-hulls. On my '85, they're the flush kind with flat disks countersunk into the outside of the hull. I suspect that choice was made for trailer loading.

On older boats (I think up till about 1983), all you can see on the outside is a hole in the hull.

Dave Bristle, 1985 C-25 #5032 "Passage" SR/FK/Dinette/Honda

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 04/27/2003 : 21:33:30

<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>NOW I have a question also....are all the to/thru hulls located in the same place , or are they different per boat?<hr height=1 noshade id=quote></BLOCKQUOTE id=quote>

I believe they are all in the same place. On North Star there is one thru-hull through the door under the stove. This one drains the ice box and sink. Another thru-hull is through the door under the V-berth. This one provides water to the marine head.

I not sure of the setup for those with the vanity sink in the head. Does it share the head's seacock or does it have a separate one?

<img src="http://www.catalina25-250.org/c25sm.gif" border=0>Don Lucier<img src="http://www.catalina25-250.org/c25sm.gif" border=0>
<img src="http://im1.shutterfly.com/procserv/47b2d904b3127cce9f7cd9ffdf1d0000003010" border=0>
North Star SR/FK

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Leon Sisson
Master Marine Consultant

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USA
1893 Posts

Response Posted - 04/28/2003 : 00:52:16

Rick,<BLOCKQUOTE id=quote>quote:<hr height=1 noshade id=quote>....are all the to/thru hulls located in the same place , or are they different per boat?<hr height=1 noshade id=quote></BLOCKQUOTE id=quote>In following the to-hull issue over the last few years on this board, it has seemed to me that the location of the various underwater holes in the hull does vary depending on year and options. The most consistant ones seem to be the swing keel cable and the galley sink & icebox drain. Up forward, they seem to be all over the place. Locations I remember reading about include under the stbd. settee, under the V-berth, and under the port settee. The number of holes for head compartment plumbing seems to vary from none (Porta-Potty, no sink) up to about three (sink drain, marine head intake, head discharge). Owner mods over the years can complicate the picture.

-- Leon Sisson

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H20boy
1st Mate

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USA
31 Posts

Response Posted - 04/28/2003 : 10:17:09

Thanks again to all

Rick Price
"79" 25' SK/Standard
Hull # 1237
Tacoma, Wa

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ddlyle
Captain

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302 Posts

Response Posted - 04/28/2003 : 15:12:26

In my '86, the galley sink and ice box drain out the port side inside the lower cabinet door. The head sink drains out the same forward location previously mentioned (behind little door under V-berth).
My porta-pottie goes over the gunwale (just kidding <img src=icon_smile.gif border=0 align=middle>).

Cap'n Dave
Sailing The Blues
1986 C25 sr/sk #5413

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