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Go Back   SailNet Community > General Interest > General Discussion (sailing related) > Closing seacocks
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Thread: Closing seacocks Reply to Thread
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Topic Review (Newest First)
05-13-2012 01:36 AM
Jgbrown
Re: Closing seacocks

Yes. always, except the sink and cockpit drain. Both hard to get to both are above waterline. The boat next to me would have had a sad day tomorrow if we hadn't opened his engine compartment while looking at the the zincs he lost after 3 weeks in the water. I noticed his bilge pump was cycling, all afternoon. Hose was fine, engine was leaking, small plastic plug was broken off below the o ring. He was not connected to shore power so batteries only. 2 very expensive engines, batteries and an expensive generator down there. He never closed the seacock before, had to pry it shut with a wrench.

EDIT: After Brent's comment one thing about my head finally(sort of) makes sense. The previous owner observed the sink drain hose runs to the deck, and nowhere else. The rubber hose is just the right length to drain into the head, so long as you are willing to hang onto it. The SS tube makes more sense, I'll try that when I get to fixing the head.
05-13-2012 12:10 AM
Bene505
Re: Closing seacocks

Let's see... 4 bathrooms at 4 seacocks each, galley sink, washdown pump, engine, crew's quarters toilet (uninstalled), crew's quarter's sink, prop shaft. That's 22 below the waterline.

3 bilge pump outlets, engine exhaust, swim platform locker.. those are above the water line.

Many of the inlets are verticle and at or near the water line at the top of the seacocks.

I'm putting a bilge-on alarm on the onboard webcam. So at least I'll get an email every time the bilge pump goes on. (I actually brought the webcam home tonight to bring it to a tech store for the right plug for the alarm connection.) I have a driod, so I usually see emails pretty quickly.

Regards,
Brad
05-12-2012 08:27 PM
Brent Swain
Re: Closing seacocks

I once worked on a boat, which had the head sink drain led thru a slightly flattened ss tube , under the head seat, into the head bowl. One thru hull eliminated. There are many such innovative options , Finding them is great sport.
05-12-2012 08:19 PM
BCC1
Re: Closing seacocks

Just did the orientation on the boat today. Been thinking about this topic.

On previous boats, I always closed seacocks, if I was going to be away more than hours.

No more.

No key needed to start the auxilary.

So, everythings going to be double clamped. and tightened.

Seacocks going to stay open thoughout the season.

Insurance, dude.
05-11-2012 08:02 PM
Brent Swain
Re: Closing seacocks

If you would stop eating in that Mexican restaurant and drinking that Mexican water, perhaps you wouldn't need three toilets.
My composter eliminates any thru hulls dealing with the heads. My skeg cooling eliminates the engine intake. That leaves just the sink drain and the watermaker intake
05-11-2012 12:15 PM
JoeDiver
Re: Closing seacocks

I've only got 2 thru-hulls.....the head fresh water intake and the galley sink/cooler drain. I keep both closed unless in use. I'll open both seacocks when I get to the boat, pump some fresh water into the head. When I'm done for the day, or weekend...I'll close both seacocks when I leave the boat.
05-11-2012 12:08 PM
catamount
Re: Closing seacocks

Quote:
Originally Posted by Cruisingdad View Post
Those that open and close for every use, I wonder if you are F/T cruisers and or LA with kids?
That would be me (open/close every use), and no I am not a full-time cruiser or live aboard.

And my boat is also very simple -- manual head, manually-pumped water, one engine, no generator, no air conditioning, no wash-down, etc....

Head: one seacock for the raw water intake which also serves as drain for the sink; one seacock for draining the holding tank (which we only open when offshore).

Galley: one seacock for draining the sink, one seacock for sea water intake (manual pump at galley sink).

Engine: one seacock for raw water cooling, one stuffing box for propellor shaft.

two seacocks for cockpit drains, left open.

two below-water thru-hulls for depth sounder and speedo paddlewheel

above water thru-hulls for engine exhaust, multiple bilge pumps, and additional cockpit drains.

The rudder shaft enters the hull above the normal waterline and is contained in a solid "stand-pipe" to deck level.

As long as the seacocks are easily accessible, it's not really a big deal to use them as the primary on/off valves for the manual plumbing systems.
05-11-2012 10:34 AM
tspooner
Re: Closing seacocks

I close them all four of them if I'm leaving the boat for more than a few hours while at dock and also when we depart the dock except for the salt water engine intake. That one get closed as soon as the sails go up. If the head needs to be used while underway it's relatively easy to open and reclose them since they're handy inside the vanity.
05-11-2012 09:26 AM
Cruisingdad
Re: Closing seacocks

Quote:
Originally Posted by Minnewaska View Post
Just for clarification, CruisingDad, does close his thru hulls when he leaves his boat for extended periods. He was referring to whether one would put a dowel into the barb of a closed seacock that had no hose attached.
Correct. I do not close them when cruising or LA (except engine and generator). When cruising the generator does not generally get closed and the main only if not being used for a while.

My biggest issues are the sink drain and the Main engine intake. Reality is that any of the thulls could sink the boat, but the sink drain (on the 400's) and the Main engine are very large Thulls and would swamp her quickly.

WHen cruising, we really have no great choice on the sink drain. It is always open. Those that open and close for every use, I wonder if you are F/T cruisers and or LA with kids? THat would get really old.

The engine is a bit of a different story. Honestly, for me, it is an issue of years of doing it and losing our key to the main once! Yes, it is true. I blame the kids (but, shhh, it was probably me on a dink ride... I mean, yeah, it was the kids or wife.). SO we long ago got in the habit of puting the key on the Thull for the main. Helps to remember where the key is and is also a bit of insurance.

Thulls that are close to waterline or above I don't worry about as much. It is the ones on the bottom of the boat that can shoot water up like a garden hose. ANything above the waterline I couldn't care less about. Exeption is when sailing we close them (like the head sink(s), because you can fill it up with water on the C400 on a good heel with some nice seas).

Brian
05-11-2012 07:42 AM
Minnewaska
Re: Closing seacocks

Quote:
Originally Posted by MikeinLA View Post
My feelings exactly. I've owned this boat for 13 years and other than the engine intake, I don't close any of them ever.......
Just for clarification, CruisingDad, does close his thru hulls when he leaves his boat for extended periods. He was referring to whether one would put a dowel into the barb of a closed seacock that had no hose attached.
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