s/v TWIG

Saga 43 - Hull #39

Thru Hulls (Seacocks)

  1. Head Flush Intake Deck Washdown Pump Intake
  2. Forward Head Direct Discharge
  3. Forward Head Macerator.
  4. AC/Heat Intake
  5. Galley Sink Discharge
  6. Aft Head Intake
  7. Aft Head Discharge
  8. Engine Intake
  9. Watermaker


Forward Bunk - Forward Cabinet

Forward edge of forward bunk. Open small door. A 3-way L-Port Valve is mounted to the forward bulkhead and controls flow between head intake and deck wash down pump.

  • (1) Small, Marlon, Black. Head Flush Intake & Deck Washdown Pump Intake.
  • (2) Large, Marlon. Forward Head Direct Discharge.
  • (3) Large, Marlon. Forward Head Macerator.

Forward Bunk - Aft Bottom Drawer

Close door. Pull out and remove aftmost bottom drawer.

  • (4) Small, bronze. AC/Heat Intake

Galley Sink

Remove floor access panel beneath sink. Handle to seacock is short.

  • (5) Large, Marlon. Galley Sink Discharge.

Floor Between Aft Cabin & Main Head

Close door to aft cabin. Remove triangle shaped sole hatch board in front of aft cabin door.

  • (6) 0.75” Marlon. Aft Head Intake.
  • (7) 1.5” Marlon. Aft Head Discharge.

Also in compartment:

  • Jabsco Par-Max4 31631-1092 3.8 GPM Parmax 4 Toilet Intake Pump
  • Extra wood plugs
  • Fuel line to removed diesel heater.

Engine Compartment

Slide top and bottom latches on port side of stairs. Open stairs by lifting port side handle. Hinged on starboard side.

  • (8) Large, Marlon. Engine Intake.

Generator Compartment

Middle board under cockpit under berth that usually has storage above it. Also accessed via a small hatch in the lazarette.

  • (9) Bronze - Used for RO water maker. From lazarette pull down toward you. From above push down to starboard.


Each factory installed seacock is made from a material which allows the valve to be free of corrosion and electrolysis. They require no electrical “bonding”.

These valves still require regular inspection and lubrication. Inspect hose clamps carefully. Any rusted clamps should be replaced immediately. All hoses should be fitted with two clamps for redundancy. Activate the handle and lubricate the seals at least twice yearly. A quality waterproof grease or vegetable oil can be used as a lubricant.

Through Hull Installation - AFTERMARKET

Each factory installed seacock or through hull is installed in an area where the core material has been removed to prevent the incursion of water into the core. Before installing any additional through hulls, the core must be removed in that area and the area sealed and locally reinforced with additional layers of fiberglass and/or backing plates. We recommend that a skilled professional experienced with cored hull construction install any desired additional through hulls.