That odd little bronze thing beneath the sole
Is so vital to my boat for water control
The skin of my vessel, as thin as can be
Depends on this marvel to keep out the sea,
So open and close it and fondle it well
Or into your ship, very wet water may swell!
As I grow older the necessity of exercise becomes more evident to maintain good health. In order to maintain flexibility and strength, one has to work those muscles and joints, As they say, no pain no gain.
One of the most neglected components on Our vessels is the lowly sea valve. Nestled below the cabin sole in the usually deep dark reaches of our bilges live these necessary and important portals to the deep. Through these values flow the life blood of our vessels. Water that cools our engines, supplies our heating and air conditioning systems, drains our decks and cockpits and dispose of waste water, etc.
Now I consider myself a boat physician of sorts. I diagnose problems and either write prescriptions or outline a course of physical therapy. A good portion of my valve patients are suffering from either lock jaw or severe arthritis. They either won’t open or close at all, or are so stiff from lack of exercise that you fear you are going to break them during the physical exam.
What these simple mechanical marvels need is a disciplined regime of exercise.
One two – one two – up down, turn around, work it Out, You can do it. Sound like Denise Austin?
American Boat and Yacht Council H-27 SEA COCKS, THRU-HULL
CONNECTIONS, AND DRAIN PLUGS, SOME BASICS
Seacock – A type of valve used to control intake or discharge of water through the
hull. It is operated by a lever type handle usually operating through a 90 degree
arc, giving a clear indication of whether it is open or shut.
REQUIREMENTS – IN GENERAL
All piping, tubing or hose lines penetrating the hull below the maximum heeled
waterline, under all normal conditions of trim and heel, shall be equipped with a
seacock to stoop the admission of water in the event of failure of pipes, tubing, or
A seacock shall be securely mounted so that the system will withstand a 500 pound
static force applied for 30 seconds to the inboard end of its connecting fitting, at
any point in its most vulnerable direction, without the system failing to perform as
intended. Seacocks shall be readily accessible as installed, and so oriented that
their handles are easy to operate. If a flanged seacock is used, its flange shall be
securely mounted to the hull.
Whether you have straight, tapered or ball valves, they all need a work out. If you have gate valves, you need to consider replacement as these valves have no place in the marine environment. If you have straight or tapered valves, they should be disassembled at least every other haul and inspected, cleaned and lubricated. Modern Teflon seated ball valves are sort of self cleaning when operated. Composite plastic ball valves are not high on my list due to the fact that they are just not as strong as their bronze counterparts and can break when the frictional resistance from age or fouling becomes too great.
When you are doing your exercise program inspect the clamps and delivery hoses for signs of deterioration. Rubber hoses don’t last much longer than seven or eight years. Look for age cracks and for signs of chafe. Pay special attention to connections where the hose may have been stretched or forced over a fitting. Look at your hose clamps. If the worm drive is rusty, it probably was a low grade stainless steel. Perforated clamps usually break across the perforations and if it looks bad, it probably is. Now is the time for replacement. I can’t tell you how many times I’ve had these things break off in my hand when I touched it. You would not believe how many boat owners don’t know where supply valves are located. Reacquaint yourself with the vessel’s circulatory system so if you ever find yourself offshore with arterial bleeding, you’ll know where to apply the pressure to stem the flow. How about hanging a proper sized (DC) damage control bung from each valve just in case of a failure. Consider a high water bilge alarm as a great equipment betterment. Believe me, no addition can save you more grief than an early warning devise. Keep that water flowing through and not into your vessel with a good program of exercise and inspection and remember that the Lord loves sailors.
© Capt. Neil K. Haynes 1999