FNM HPEP 225 Installation Manual page 29

Seawater Connections
SEAWATER PICKUP HOSE
Seawater inlet hose connections must be made with wire reinforced hose of adequate wall
thickness to prevent it from collapsing from pump suction. Be sure to secure hose
connections with hose clamps. Secure hose to prevent contact with any moving parts of the
engine. Select the proper hose from the following chart:
SEACOCK SIZE
Seacock used must have an internal cross-sectional area equal to or greater than seawater
inlet hose to prevent restricting water flow. Install valve in an area where it will be easily
accessible and supported adequately to prevent hose fatigue. A brass ball or gate valve is
required. Select a proper seacock based on the following chart:
Seacock Size (Internal Cross-Sectional Area Equal to or Greater Than Size
SEAWATER STRAINER
Strainer used must be of sufficient size to ensure that an adequate supply of water will be
maintained for cooling the engine. Select a proper seawater strainer based on the following
chart:
Install seawater strainer in an area where it will be easily accessible for inspection and
cleaning. Strainer should be installed in water inlet hose after the seacock (water inlet valve)
to allow operator to shut off water when cleaning strainer.
Seawater Pickup Hose Inner Diameter
All Models
All Models
Seawater Strainer Minimum Flow Rate
All Models
Shown)
100 L/min (26.6 gal/min)
32 mm
≥ 32 mm
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