Specifications

and high pressure pump seal life will be unacceptable. It should be noted that a Feed-water
Pump Module will enhance the operation of any system, regardless of where the PFM is
mounted in relation to the feed-water supply level and is supplied with this system.
Water Connections
Use
3
/4" ID food-grade suction hose to connect the outlet of the Feedwater Pump Module
to the inlet of the Pre-filtration Module (PFM) and the outlet of the PFM to the feed-water
inlet of the Pump/Clutch Assembly. Secure all connections with hose clamps, using two
clamps at each connection for additional safety.
Avoid unnecessary bends or rises in the feed-water hose. Protect the hose and fittings from
mechanical damage as a leak in the feed-water hose of a marine installation could cause
flooding of the vessel. Follow good marine practice for all marine installations. Consult a
qualified marine installer if in doubt.
Remember that all fittings used must be made of non-ferrous materials such as PVC,
brass, bronze, or 316 stainless steel. Rust from ferrous materials will permanently damage
the reverse osmosis membrane.
Marine installations should have a
3
/4" or larger bronze through-hull fitting installed
through the bottom of the vessel. Since this inlet is below the vessel's waterline, a sea-cock
valve must be provided for safety and servicing convenience. Install a
3
/4" barbed hose
connector on the sea-cock. Use only suitable, corrosion resistant, non-ferrous fittings.
Safety dictates that the below waterline connections be done according to good marine
practice. Consult an installation specialist if in doubt.
Shore based installations must have feed-water pick-ups installed. This usually consists of
a PVC strainer/foot-valve fastened to the end of a PVC pipe and submerged in the feed-
water source. The foot-valve prevents the system from losing it's prime.
Mount the foot-valve high enough above the source bottom so as not to ingest sand and
sediment, yet low enough so that it will always be below the source surface, regardless of
tides and wave action.
Seal all pipe threads with Teflon pipe tape.
It is very important, that in both marine and shore-based installations, no ferrous (steel or
iron) materials be used in the feed-water system as even minute traces of rust can damage
the semi-permeable membrane.
If a Feed-water Pump Module is going to be used in this system, install it at this time as
before.
If a Feed-water Pump Module has been installed, connect the outlet of the feed pump to
the inlet of the PFM with the
3
/4" ID suction hose.
If a Feed-water Pump Module has NOT been installed, connect the outlet of the feed-water
source to the inlet of the PFM using the
3
/4" ID suction hose and the
3
/4" hose barb to
3
/4"
MNPT connector.
Connect the output of the PFM to the
3
/4" barbed fitting on the Pump/Clutch Assembly
using the
3
/4" ID suction hose.
Route the suction hose neatly, avoiding any unnecessary bends or rises. Protect the
suction hose from abrasion and other mechanical damage. Clamp the suction hose at
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