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A Buchan trap (alternative names: Bristol interceptor, [1] interceptor trap and disconnecting trap) is a device fitted in a domestic sewer pipe to prevent odours entering the pipe from the public sewer [2] and permeating the house, a common problem before individual plumbing fittings were separately trapped.
In plumbing, a trap is a U-shaped portion of pipe designed to trap liquid or gas to prevent unwanted flow; most notably sewer gases from entering buildings while allowing waste materials to pass through. In oil refineries, traps are used to prevent hydrocarbons and other dangerous gases and chemical fumes from escaping through drains.
The Fisheries Act of 1932 (Act 4003) restricted fishing access to American and Filipino companies and created the concept of municipal waters, which reached 5.5 kilometres (3.4 mi) from the shore, [67]: 175 [13]: 2 within which only municipal governments could create fish ponds and corrals, catch milkfish fry, and license ships smaller than 3 tons.
Aquaculture grew 5.42% annually in the decade leading to 1997, while commercial fisheries expanded 4.47% annually. This offset a 1.54% annual decrease in municipal fisheries production. In 1995, the Philippines was the twelfth-largest fish producer and fourth-largest aquaculture producer.
A traditional payao is a bamboo raft anchored to the seafloor with rocks. They are usually placed in very deep water, but coastal and shallow-water versions also exist. The rafts are around 4 m (13 ft) long, 1.5 m (4.9 ft) wide, and tapering at one end.
About 20 storms and typhoons batter the Philippines each year. The archipelago also lies in the “Pacific Ring of Fire,” a region along most of the Pacific Ocean rim where many volcanic eruptions and earthquakes occur, making the Southeast Asian nation one of the world’s most disaster-prone.
A gully is a landform created by running water, mass movement, or commonly a combination of both eroding sharply into soil or other relatively erodible material, typically on a hillside or in river floodplains or terraces.
Grease trap sizing is based on the size of the 2- or 3-compartment sink, dishwasher, pot sinks, and mop sinks. Many manufacturers and vendors offer online sizing tools to make these calculations easy. The cumulative flow rates of these devices, as well as overall grease retention capacity (in pounds or kilograms) are considered.