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When you open drains
Yes, but most boats have drains in the open cockpit area (scuppers) to allow the rainwater to flow back outside to the sea or lake. Most boats that do sink, sink for some other reason than rain.
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There are two types or rainwater haversting. Rooftop rainwater harvesting and drain harvesting. In rooftop rainwater harvesting, we use the water collected on rooftops instead of letting it go down the drain. We can also use water collected in dugout ponds, underground vessels etc. Drain harvesting involves letting water collected in roadside drains go straight to the ground. But this water has to be treated before use as it may contain bird faeces, germs and other pollutants.
An open drain has no covers while a covered drain does.
Biggest problems are the windings either having an open circuit or a short circuit.
The abbreviation for Open Hazardous Drains is OHD. This term is often used in environmental and safety contexts to refer to drains that pose a risk due to the potential release of hazardous materials. Proper management and labeling of OHDs are crucial for public safety and environmental protection.
Storm drains have multiple opening which accept waters; Road culvert is an open-ended drains and placed at a road crossings .
Rainwater harvesting system is collection of rainwater from the surface which directly receives rainfall. It can be a paved area like a terrace or courtyard of a building, or an unpaved area like a lawn or open ground.Following links helps to understand what is rainwater harvesting and how to implement them successfully in your apartment.http://www.reddit.com/r/reddit.com/comments/avm9y/rainwater_harvesting_an_efficient_water_solution/
Scorpions can enter drains through cracks or openings in the pipes or through drain covers that are not securely fitted. They are attracted to dark, damp environments and may accidentally fall or crawl into drains while searching for shelter or food.
Sodium hydroxide, also known as caustic soda, is commonly used to open drains. It is a strong alkali that helps break down grease, hair, and other blockages in drains and pipes. However, it is important to use it carefully and follow safety instructions when handling it.
The drains that drain water from the run-off from the convertible top in the rear have stopped up. The drains are located under the rocker panels just in front of the rear wheels. On the 2004 and up, the drains are square and covered by a rubber flap. They are hard to see, but you can feel them and push the rubber flap up with your finger and squirt water from a garden hose up into the square drain holes. You will probably see dirty water full of crud drain out if you will hold the rubber flaps open. I also put the convertible top about half down and thoroughly rinse the interior space where the rainwater runs down to the drains. On earlier convertibles, the drains are little louvers on the bottom of the rocker panels and are not covered by a rubber flap.