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At a building the wires enter a conduit, a protective metal pipe, and the weatherhead is a waterproof cap on the end of the conduit that allows the wires to enter without letting in water. It is shaped like a hood , with the surface where the wires enter facing down at an angle of at least 45°, to shield it from precipitation.
Diagram of a radiative collector. (a) radiating/condensing surface, (b) collecting gutter, (c) backing insulation, (d) stand. A radiative air well is designed to cool a substrate by radiating heat to the night sky. The substrate has a low mass so that it cannot hold onto heat, and it is thermally isolated from any mass, including the ground. [43]
Copper gutter system showing half round copper gutters, radius copper guttering, copper leader head, round copper downspout pipe, decorative copper gutter hangers. Leaking gutters and downspouts can cause serious damage to a building's interior and exterior. Copper is a good choice for gutters and downspouts because it makes strong leak-proof ...
Copper Leader Head at Penn's Quadrangle, Philadelphia 1894 Copper Leader at Shofuso Japanese House and Garden in Philadelphia. The purpose of a leader head is to help transfer excess water from the roof onto downspouts, thus preventing the gutters from overflowing and water washing over the walls, which is a common occurrence in areas susceptible to heavy rain cycles.
Water falls towards a parapet gutter, a valley gutter or an eaves gutter. [12] When two pitched roofs meet at an angle, they also form a pitched valley gutter: the join is sealed with valley flashing. Parapet gutters and valley gutters discharge into internal rainwater pipes or directly into external down pipes at the end of the run. [12]
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Israeli Netafim, drip irrigation. Drip irrigation or trickle irrigation is a type of micro-irrigation system that has the potential to save water and nutrients by allowing water to drip slowly to the roots of plants, either from above the soil surface or buried below the surface.
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