The raw water strainer is anchored in location by tying a sand bag provided in the BII box to it. The float has 410 micron screen which provides the first stage of filtration in the process. This part is stored inside COEI box when not in use. Two sections of 1-1/2 inch diameter, 25 ft. long hoses are used to pipe the water from the source to the raw water pump.

The Raw Water Pump is used to draw the water from the source into the settling tank. This pump is stored inside the Pump module when not in use and has a 1-1/2 inch stainless steel camlocks as an intake fitting. All service pumps are interchangeable. For example, in case of raw water pump failure, the distribution pump, or any of the other service pumps, can be used to replace it simply by switching the intake fittings.

The 1000-gallon collapsible fabric tank receives the raw water from the water source. The water is then drawn from just below the surface inside the settling tank through a 200-micron floating strainer. In case of chemical pump failures, the 1000-gallon tanks can serve as reservoirs for batch treating the water with chemicals.

The floating strainer is placed inside the settling tank and connected to the settling tank outlet spool piece to draw the water from near the surface. The water is strained through a 200-micron strainer before entering the UF module.

A Booster pump is used to draw water from the settling tank and into the UF module. The primary function of the UF module is to pre-filter the water before the RO membranes. It is accomplished by means of three 35-mil UF cartridges that can filter suspended particles, bacteria and microorganism. They are capable of producing filtrate water with less than (0.1) NTU. The UF membranes offer the advantage of prolonged RO membrane life due to micron size removal regardless of the feed water conditions and elimination of disposable filters. The filtrate is then stored in the filtrate tank.

A 40-gallon capacity filtrate tank is attached to the UF module. The purpose of this filtrate tank is to provide filtrate for backwash and fast flush while allowing continued operation of the high-pressure pump and thus potable water production. The backwash pump is used to draw water from the filtrate tank for backwashing and fast flushing operations.

The High-pressure pump is driven by a diesel engine and is used to pressurize the filtrate water up to 1200 psi for the RO membranes. The pump draws the water from the filtrate tank on the UF module and feeds the RO module by means of a braided stainless steel hose. The Reverse Osmosis module consists of seven RO membranes in series. The water is fed from the high-pressure pump and this high-pressure forces the water through the RO membranes. Approximately 30 % of the filtrate is recovered as permeate and passed on to the chemical module. The rest of the concentrate or brine is discharged as reject. The permeate from the RO module is passed through the chemical module where it is metered in the totalizer and receives the chlorine injection for residual disinfection.

The product tank has a capacity of 1000-gallon and is used to stored product water before distribution. The distribution pump is used to supply product water at a rate of 10-gpm through a nozzle. The nozzle is to be kept off the ground by using the Service pump module frame.