Through Hulls & Seacocks ~ Stage1 - 4/15, Stage2 - 9/15

The Vagabond 42 is built with 18 below the water line through hulls. Each through hull has a seacock to close of flow through the through hull. We found that all but 2 of the seacocks were seized. The OEM seacocks used by the boat builder Bluewater Yachts are of the taper-plug bronze design. They have a grease nipple and a -20 lock nut. The retro-fitted seacocks are all of the modern ball valve design. Over a period of 2 haul outs, every through hull has been lubricated and checked that the attached hoses are double clamped per ABYC standard. Alll seacock handles are inline with the hose to OPEN the seacock and 90 square to the hose to CLOSE the seacock.

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The listing of the seacocks is as follows

Through hulls 3 and 4 are never closed but require testing every 3 months, 12 and 15 are closed if the boat is going to be hauled. All other seacocks should be closed whenever the boat is not to be used.

As is shown on the listing, 5 new through hulls were added. They are all the 1/4 turn stailess steel ball valve design which fit beween Nylon / Plastic seal control cups. This type of valve is maintainanve free and will last the life of the boat. We found that all but 2 of the 17 original seacocks were seized. These OEM seacocks used by the boat builder Bluewater Yachts are of the taper-plug bronze design. They have a grease nipple and a -20 lock nut. As longe as they are greased and operated at least every quarter they to will last the life of the boat.

As we went through the cleaning, greasing of the taper-plug bronze type we found that all the bonding connections had be cut. ABYC has not formally stated how througfh hulls ought to be bonded other than to say that there is no reason to bond a metal object that is mounted in fiberglass yet has no possible electrical ground path to the bonding system. As all through hulls attach to seacocks that have fiber reinforced vinyl hose no possible ground circuit ecist and thus the through hull does not need bonding.