Main Drain: The main drain is typically located at the deepest point of the pool and is used to lower the water level, however its primary purpose is to circulate water from the bottom of the pool. It is recommended that about 1/3rd of the circulated water come from the main drain.
Main drains are not required in an inground swimming pool, however, they are strongly recommended and can be extremely useful in some circumstances. The advantages of main drains are to give you the ability to drain the water from your pool without the use of a sump pump. This is useful when replacing your pool liner.
Thereof, How do I use the main drain on my pool?
A pool’s so-called main drain is not actually a drain; that is, it is not used to drain the pool. Instead, it is an outlet, housing a pipe that runs 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 via multiple inlets.
Also to know is, Do you need a main drain in a swimming pool? Main drains are not required in an inground swimming pool, however, they are strongly recommended and can be extremely useful in some circumstances. The advantages of main drains are to give you the ability to drain the water from your pool without the use of a sump pump. This is useful when replacing your pool liner.
Subsequently, question is, What is the plug at the bottom of my pool? They are called Hydrostatic Relief Plugs or “Hydrostats”, for short. Hydrostatic openings in the pool floor are put in place to allow ground water to enter the pool – rather than lift the pool out of the ground with immense pressure.
Also, Do fiberglass pools have a main drain?
Fiberglass manufacturer believes pools are safer without suction outlets. San Juan Pools will no longer include main drains with its shells. The fiberglass-pool manufacturer is taking a firm stance against suction outlets because it does not want to assume liability for drains with limited life spans.
How many main drains should a pool have?
two
Do all pools have drains?
All pools have the same main components that keep the water moving and clean – a pump, filter, drains and skimmer, return lines and vacuum.
What happens if you sit on a pool drain?
According to the Consumer Product Safety Commission, the pressure on some pool drains can be as strong as 300 pounds per square inch. 1 This kind of pressure can suck in hair or body parts, or trap swimmers underwater and cause them to drown, even if someone is trying to pull a victim away from the drain.
How do you unclog a main drain in a swimming pool?
– To prevent clogs from occurring in the first place, regularly remove debris from the top of the pool with the skimmer. …
– Remove the pool drain plugs and let it drain. …
– Unscrew the drain cover and place the pool plunger over the drain. …
– Pour the organic pool drain cleaner into the drain.
How do I plug my pool drain?
Locate the small hole at the bottom of the main drain. This is the plumbing line to the filter. Plug the small hole with an expandable rubber plug or a plastic threaded plug, if the hole is threaded. Replace the main drain lid if needed.
Where is the main drain valve on a pool?
Main Drain: The main drain is typically located at the deepest point of the pool and is used to lower the water level, however its primary purpose is to circulate water from the bottom of the pool.
Should skimmer valve be open or closed?
For the cleaner to operate at maximum efficiency, only the skimmer and cleaner valves should be open. No other valves should be open. Valves are positioned for a suction cleaner. Main drain fully closed, skimmer open half way, cleaner line fully opened.
Should pool main drain be open or closed?
Should the Main Drain Valve Be Open? No, not if you are using a suction type of cleaner. The purpose of a pool main drain is to pull water from the bottom of the pool through the pump and filtration system.
Where does a pool drain to?
During normal operation, water flows to the filtering system through two or more main drains at the bottom of the pool and multiple skimmer drains around the top of the pool. The main drains are usually located on the lowest point in the pool, so the entire pool surface slants toward them.
How do I stop my pool from draining?
– Shut off the pump.
– Go to the back of the filter and unscrew the drain plug.
– Turn the pump back on and let the water run until it reaches the point where you want to drain the water out.
– Turn the pump back off and put the plug back into the drain plug.
Does a pool need a bottom drain?
Main drains are not required in an inground swimming pool, however, they are strongly recommended and can be extremely useful in some circumstances. The advantages of main drains are to give you the ability to drain the water from your pool without the use of a sump pump. This is useful when replacing your pool liner.
How do I empty my pool water?
Don’t forget to share this post 
References and Further Readings :
