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bartenderdave | profile | all galleries >> Surf Scoter: A Cuddy Cabin Bartender >> 20-4 Bartender Part IV: Redos >> Seacock Replacement tree view | thumbnails | slideshow

Seacock Replacement

Replacement of original brass seacock and associated fittings and hose.
New bronze seacock/hose barb vs old brass equivalents and hose. Handles removed.
New bronze seacock/hose barb vs old brass equivalents and hose. Handles removed.		 Old one disassembled. Hose barb is a brass close nipple, one end's threads filed down to accept hose.
Old one disassembled. "Hose barb" is a brass close nipple, one end's threads filed down to accept hose.		 White material sign of dezincification of valve body. In time metal becomes weak and can fail.
White material sign of dezincification of valve body. In time metal becomes weak and can fail.		 Especially likely with 2-3 threads of engagement to thruhull. Thread styles don't match (straight vs taper).
Especially likely with 2-3 threads of engagement to thruhull. Thread styles don't match (straight vs taper).
Maple block cut guide -- to reduce height of thruhull stub.
Maple block cut guide -- to reduce height of thruhull stub.		 Guide in place; in all, half an inch removed to lower profile of new system.
Guide in place; in all, half an inch removed to lower profile of new system.		 Thruhull stub at desired height; straight threads will engage about 8 turns.
Thruhull stub at desired height; straight threads will engage about 8 turns.		 Rough fit onto stub shows an added half inch of backing needed.
Rough fit onto stub shows an added half inch of backing needed.
Mounting holes are countersunk to accept flathead woodscrews; extra chuck provides clearance.
Mounting holes are countersunk to accept flathead woodscrews; extra chuck provides clearance.		 Heads of screws too wide; filed to half inch diameter.
Heads of screws too wide; filed to half inch diameter.		 Screws in place.
Screws in place.		 New seacock on added backing, of precise thickness to get correct handle angle.
New seacock on added backing, of precise thickness to get correct handle angle.
Final test fit before bedding; handle stud at left.
Final test fit before bedding; handle stud at left.		 Seacock bedded; Strainer temporarily reinstalled.
Seacock bedded; Strainer temporarily reinstalled.		 Molded radiator hose: 1-1/2 inch one end necking to 1-1/4 inch.
Molded radiator hose: 1-1/2 inch one end necking to 1-1/4 inch.		 Necked section and diagram of its intended fate.
Necked section and diagram of its intended fate.
Sized to join seacock 1-1/4 hose barb to strainer 1-1/2 barb.
Sized to join seacock 1-1/4" hose barb to strainer 1-1/2" barb.		 Inch and a half portion up; smaller end on the seacock.
Inch and a half portion up; smaller end on the seacock.		 Strainer reinstall: tightening hose barb leading to raw water pump.
Strainer reinstall: tightening hose barb leading to raw water pump.		 Tightening hose clamps galore; two per connection.
Tightening hose clamps galore; two per connection.
Reinstallation complete. Smoke test tomorrow.
Reinstallation complete. Smoke test tomorrow.

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bartenderdave08-Sep-2009 11:49
Dave Gerr's excellent "Boat Mechanical Systems Handbook" is a good resource for avoiding issues such as my original brass seacock installation. Check out page 279 for the text and photos which stimulated the replacement. Dave K.
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