i don't know if this is really the correct place for posting this question but here it goes! Can somebody tell me how the venturi metre and the filter pump work? 
A filter pump is a mechanical device that is used to circulate and filter water in a pool or spa. It works by drawing water from the pool or spa, passing it through a filter to remove debris and impurities, and then returning the clean water back into the pool. This process helps to keep the water clean and clear.
A filter pump works by using a motor to power an impeller, which creates suction and draws water into the pump. The water then passes through a series of filters, such as sand, cartridge, or diatomaceous earth, to remove dirt, debris, and other contaminants. The clean water is then returned to the pool through a return jet.
A venturi meter is a type of flow meter that is used to measure the flow rate of a fluid, such as water or gas, in a pipeline. It consists of a narrowing section, known as the venturi, which causes the velocity of the fluid to increase. This increase in velocity is then measured and used to calculate the flow rate.
A venturi meter works by using the principle of Bernoulli's equation, which states that as the velocity of a fluid increases, its pressure decreases. In a venturi meter, the narrowing section causes an increase in velocity, which results in a decrease in pressure. This pressure difference is then measured and used to calculate the flow rate of the fluid.
Using a filter pump and venturi meter can have several benefits, including keeping your pool or spa water clean and clear, saving energy by reducing the need for manual cleaning or chemical treatments, and accurately measuring the flow rate of water or gas in a pipeline. This can help to ensure proper maintenance and operation of your pool, spa, or industrial system.