Drains and Skimmer The main drain is located at the bottom of the pool in the deepest part. Most pools have one, but larger pools can have several main drains. Main drains must be protected by an approved cover. Water is also introduced into the pump through one or more skimmers, located in the waterline.
The main drains are usually located at the lowest point of the pool, so the entire pool surface slopes toward them. Most of the dirt and debris that sinks out of the pool through these drains. To prevent people from catching their hair or limbs in pipes, drains are almost always covered with anti-vortex grilles or covers (a cover that diverts the flow of water to prevent a dangerous vortex from forming). The so-called main drain of a pool is not really a drain; that is, it is not used to drain the pool.
Instead, it's an outlet, which houses a pipe that goes to the pump, which sucks water through a skimmer, then through a filter, then through a heater (if you have one) and then back to the pool through multiple inlets. Most pools have two main drains, but a small pool can have only one. The drains are placed at the deepest point of the pool. If possible, route the drain hose down from the pool.
This is an additional precaution in the event of a drainage problem. And while draining a pool may seem like a simple concept, some pools, such as fiberglass and vinyl, aren't designed to drain, so they require special consideration. Take advantage of the empty pool for as much maintenance as possible and drain the pool as often as possible. And no matter how well you take care of your pool, there will come a time when it needs repairs, from minor tweaks to a vinyl siding to plastering cracks in the cement.
You can be better prepared for this by knowing how many gallons of water you'll need to fill your pool. In most cases, these weather windows prevent streets and sewers from flooding with pool water during typically rainy seasons. Just like you would when you open your pool for the season, you'll want to balance the water from scratch. These valves allow water accumulated underground to rise to the pool when it drains.
If water were to accumulate under the pool with nowhere to go, it would create hydrostatic pressure, which is what would cause the pool to explode. When the water reaches approximately halfway through the skimmer, turn off the faucets, remove the hoses, and turn on the pool pump. In the worst case scenario, algae proliferate and bacteria form to make a pool look anything but attractive and desirable. If you look at the floor of your pool, you'll see at least one, but probably some white rings embedded in the floor.
Whether it's draining or filling up, be prepared to spend a lot of time at home, near the pool, ready in case something goes wrong. This includes everything from cleaning extreme metal stains and calcium deposits to repairing cracked pool floors and repainting the bottom of the pool. When the pool reaches that point, you may only need to open a valve to relieve built-up pressure. It would be unreasonable, for example, if a high-performance swimming pool cleaner robot could not come into contact with water.
The narrow ports at the inlets create additional water pressure, so water is thrown into the pool instead of simply flowing into it.
