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Appendix 12

LWTS Enclosure Plans and Specifications

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LWTS Enclosure Plans and Specifications
To ensure that the LWTS will be able to provide safe water to the community for many years it must be protected from long term exposure to ultraviolet rays from the sun, flooding, vandalism, and theft (as well as freezing temperatures where applicable). A simple protective enclosure includes the following elements:

  • Concrete pad to support the LWTS and provide the operators a solid dry surface to work on
    • Minimum dimensions: 8’ wide by 10’ long by 6” thick
    • Constructed with wire or rebar
  • Concrete block or fence enclosure with a door that can be locked to control access to the LWTS
    • Minimum height: 8’
    • Minimum door width: 4’
  • Metal or thatched roof to shelter the LWTS from direct sunlight

Hot Weather Protection
In tropical climates, Ultraviolet rays from the sun will break down hoses and PVC piping very quickly. Signs of deterioration will begin to appear within a few months. Thus, it is essential to protect the LWTS and associated hoses and piping from prolonged exposure to direct sunlight.

Cold Weather Protection
In cold weather applications, steps must be taken to protect the LWTS from freezing. The best protection is some form of heating or insulation that prevents the water inside the tanks, filter units, and hoses from freezing. Alternatively, the water can be drained from the tanks, filter units and hoses before freezing conditions develop. This is a time consuming job, and it should only be done when the unit can not be placed in an insulated or heated enclosure.

Because hoses and distribution piping will break if water is allowed to freeze in them, they must also be protected from freezing condition. It is best to bury hoses and piping because this protects them not only from freezing conditions but from other forms of damage as well. To protect from freezing, hoses and pipes should be buried below the frost line. If hoses and pipes cross a road, they should be buried at least 24 inches below the road surface.

If it is not possible to bury hoses and pipes, they should either be drained or insulated to protect them from freezing conditions.

Examples of LWTS Enclosures
Examples of typical LWTS enclosures are shown in Figures 1-3. Specifications for typical concrete pads, walls, and roofs are shown in Figures 4 and 5.

Figure 1: Concrete enclosure with metal roof
Figure 2: Wood framed wire fence enclosure with metal roof
Figure 3: Metal framed wire fence enclosure with metal roof

Mailing Address:
Water Missions International
P.O. Box 31258
Charleston, SC 29417

Physical Address:
Water Missions International
2049 Savannah Hwy.
Charleston, SC 29407
Phone:(843) 769-7395
Fax:(843) 763-6082
Web: http://www.watermissions.org/

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