New Build

Buying a new boat?

See our list of builders offering Seakeeper on their boats.

Search Builders
Refits

Have an existing boat?

Find a Dealer See Completed Installations Remanufactured Products
Explore Refit Process

Seakeeper 6 Installation Manual (90402-6) 6-254-8146 to Current

Manuals Home Contact Support Print Manual

Seakeeper 6 Installation Manual (90402-6) 6-254-8146 to Current

4.3 Connecting Seawater to Heat Exchanger

Connecting Seawater to Heat Exchanger

Refer to Figure 45 for typical seawater plumbing arrangement.

Figure 45 – Typical Seawater Plumbing Arrangement
  1. Connect the seawater pump to the Seakeeper dedicated through-hull fitting. A seacock valve, an electric ball valve, and a strainer should be installed between the seawater inlet and the pump (See Figure 45).
  2. Connect seawater from the installer-supplied pump to the lower ¾ in. (19 mm) hose barb on the heat exchanger. Use the same practices as other below-waterline seawater plumbing. Required flow rate is 2.5 GPM (9.5 LPM) minimum and 5 GPM (18.9 LPM) maximum.
  1. Connect the seawater discharge (upper hose barb) to the overboard drain. It is recommended to install a visible flow meter in the discharge line, though it is not required for permanent installation. Use the same practices as other below-waterline seawater plumbing.
  2. In addition to initial operation at the dock, new installations should be checked for seawater flow while the vessel is at speed and when backing down. The flows should be recorded when the seawater pump is running and when it is off.
    • If no other method of confirming flow is available, the discharge line may be temporarily diverted to a bucket. Flow is calculated from the time required to fill a known volume (e.g., a 5-gal. bucket).
    • A self-priming seawater pump (customer/installer supplied) may be required at the installation location to maintain water flow in all underway conditions where cavitation may occur and potentially cause an air lock, restricting seawater flow to the heat exchanger.
  3. Inspect raw water plumbing after sea trial for any signs of leakage.
  4. The heat exchanger has removable end caps to provide access for cleaning the tube bundle.

Seakeeper Optional DC Seawater Pump (P/N 30331)

  1. Seakeeper offers a self-priming DC Seawater pump as an optional addition, P/N 30331– DC Seawater Pump Assembly, shown in Figure 46.
  2. The Seakeeper Seawater Pump is a 24 VDC pump operated at 12 VDC for the Seakeeper 6.
  3. The pump assembly is pre-wired for connection to Seakeeper 6 “DC Seawater Pump Out” cable and includes a seawater strainer and various fittings. The pump specifications are as follows:

Note: Use only SeaFlo®-provided threaded fittings for DC Seawater Pump 30331.

Volts24 VDC (operate at 12 V for Seakeeper 6)
Rated Flow2.5 – 5 GPM (9.5 – 19 LPM)
Overcurrent Protection Rating15 A at 12 Volts
Ignition ProtectionISO 8846 or equivalent
Figure 46 – Seakeeper 6 DC Seawater Pump (P/N 30331)
View All Pages