Best Answer

I have had mine to clog to the amount of trees in the yard. All you have to do is take your garden hose to the exit point of the drain. Wet a cloth put the hose in the end wrap the cloth around the hose. As tight as you can. Turn the water on. It is pushing in the other way. It has always worked for me.

I usually use a "Clog Buster". It's a rubber bladder that connects to a water hose and it will expand to the size of the pipe then flush water through the pipes. You can search Google for "Clog Busters" and find 'em usually. Also, Home Depot and lowes carry them as well.

When I purchased my property the fibreglass pool had rust coloured marks in various places on pool floor. I tried diving and using a pot scourer to remove them..but to no effect as both air and energy quickly ran out. The only solution was to completely drain the pool to get right down to the problem. Now I thought that draining the pool was to be as simple as "pulling out the plug" as one does when emptying the bath at home. Not so! For some reason that escapes me, when I unscrewed the plastic outlet plug, the pool proceeded to backfill with foul smelling sandy water up through the plughole ! Now why would a pool have an outlet hole which just interfaces the underlying ground surface of the pool instead of having an outlet pipe connected just like a household bath through which to drain out the water using the pool's own water pump? You tell me? As if this wasn't worrying enough, I noticed that as I walked down to the depest end of the pool I felt unsteady on my feet as if I was becoming ill and going fall over at any minute. I did begin to feel queezy because the sensation was like that of if you've had that you know exactly what I mean! But No! I wasn't ill at all for as I retreated up the slope to the shallower part of the pool I felt perfectly ok again! Now I really was confused. How could I feel so sick in one place and not another! So, I gingerley started stepping forward again down towards the deeper end of the pool. Whoah! Whoa! there comes that crazy day feeling again ! I took one step back while looking down. And guess what? The whole pool floor was actually flexing up and down in a wave like motion as I walked upon it. I looked at the drain hole and with every step I took the sandy water would swoosh up from the drainhole and when I stepped back it was be drawn back down again into the plughole! What a joke! This could only mean that there was a pool of water of indeterminate size and volume under the pool proper. Anyway I had to use the pool pump to suck the water out of the pool as low as the vacuum hose extension would allow me to. Then I rigged up a small 240volt water pump from an old backyard water fountain system with a washing machine hose and a length of garden hose attached to suck out some more. The final dregs were taken out using a plastic dustpan as a scoop to put the last drops into a bucket. Phew! was a sunny day of about 25 degrees celsius, but inside the pool was like being in a kind of enclosed oven. This took me a whole day and I was exhausted. Next day I diligently set to using dampened fine wet or dry paper to rub the pol surface to remove the rust stains, and at first it worked a treat. Then I found that I had been working on the SMOOTH fibreglass surface area. Yep! you guessed it life wasn't meant to be easy for for a "do it yourselfer" like me. Now I had to tackle the stippled fibreglass surface area, and yep, you guessed that one too........this was where the majority of the big rust stains were! Is pool ownership such a good idea? I found myself endlessly and punishingly asking myself ! Now I was down to using a toothbrush and Jif paste cleaner to try and remove the rust stains. On the stippled surface I found it very difficult. It was a bit like trying to scrub an deeply piited orange peel. In the end, I settled for a small improvement attempt then gave it up as a bad job! OK so now I had an empty pool with some scuffed out markings in various places on its bottom. T Don't laugh !...........can you guess? Yep, that night it rained quite heavily! As our Australian sunshine State of Queensland is currently badly drought affected, the news bulletins had a field day RAVING ON ABOUT THE WONDERFUL DOWNPOUR, which although welcome, would do little to change the newly imposed water use restrictions. Can you guess what this Do It Yourselfer was screaming out loud all day? You can? OK so there's no need for me to print the filthy diabolical diatribe! Now like most of you I have stumbled onto this site as I search in vain for some hero to give me the freebie info I need to remedy the water table problem I have. You know the next time you have a bath, I want you all to say a prayer for the smartass who invented the 100 liter home bath plughole ...with a that ignorant do it yourselfers like you and me could simply pull a plug and have the unwanted water drain away to a place..who knows or cares where ! Then I want you all to set up your candles and voodoo gear and Satanic ritual stuff, and Yep! guessed it ... Put Beelzebub's Curse on the twit who thought the best way to empty a 30000 litre swimming pool was with a hole directly into the ground underneath it!

Just be thankful that after you pulled the plug that your pool did not float out of the ground once the pool was even partially empty. I just cannot imagine what fowl things would exit your head then. The "Main Drain" unlike a bath tub is meant to draw pool water from the bottom of the pool for better circulation throughout the pool. It's connection goes directly to the skimmer and then directly to the pool pump. Great story LOL. Another reason to not hire a house plumber to plumb your pool

Yikes.... concerning the second answer...

The main drain has two pipes. One leads directly back to your pump/filter and is the proper one to use for expelling water from your pool. You simply shut off your return valve and open your backwash valve and water will be pumped out of the pool. There is nothing to be done to the main drain at the bottom of the pool. There is NO "pulling the plug". ...Alternatively, you can rent a commercial submersible pump if you want to drain the pool quickly.

The second pipe (the one opened by the afforementioned answer) is a hydrostatic release valve. It's purpose is not to drain the pool!!! It is to release pressure from ground water residing underneath the pool (explaining the foul sandy water entering the pool when opened). This valve needs to be opened when draining the whole pool to prevent the pool from cracking or popping out of the ground. When you drain the pool is can become very much like a boat and will want to float on top of the ground water beneath.

Your quite lucky that you didn't crack your pool or watch it rise from the ground!!!

User Avatar

Wiki User

โˆ™ 2015-07-15 21:48:58
This answer is:
User Avatar
Study guides

What is a balance equation

Is hair perm lotion an acid

How do you adjust the pH level of pool water

Is shampoo an acid or base

See all cards
16 Reviews

Add your answer:

Earn +20 pts
Q: How can you unplug the main drain pipe in your pool?
Write your answer...
Still have questions?
magnify glass
Related questions

An inlet pipe on a swimming pool can be used to fill the pool in 18 hours The drain pipe can be used to empty the pool in 20 hours If the pool is one-third filled and the inlet pipe drain are opened?

20 hours

Why is your pool draining from the main drain?

If you mean you are losing water, it may be a broken or cracked main drain or possibly your hyrdo-static valve is malfunctioning. One other possibility is a break in the pipe going to the main drain.

Can you replace the main drain in concert pool?

no you can not

What is the Purpose of a main drain in a swimming pool?

If its not connected through the skimmer I imagine it's there to empty it. hmmm, on the above. The main drain in pools is for circulating the lower part of the pool and is not intended to drain the pool as in a bath tub.

How do you repair a broken main drain line in a concrete in-ground pool 9 feet deep?

Check out: They install a pipe lining kit that lines the entire length of pipe without excavation!

How to drain pool using main drain?

A lot of people confuse the hydrostatic valve at the bottom of the pool for a main drain. this is in fact not a drain but is there to allow water into the pool from outside if the pool is empty or partially empty to stop it from floating in ground water. Since hydrostatic valves are positioned in the sump next to the main drain pipe, unless you remove the drain grate you won't even see the hydrostatic valve. I have never heard of anyone mistaking one for the other as one looks kind of like a plug and the other is obviously a pipe. I have had to correct many of the answers from the original answerer of this and many other questions and would not follow any of his advice. I speak from 34 years of pool building and remodeling experience and am considered by my peers an expert in this field. I have drained about 20,000 pools and except for a handful of times have always used a submersible pump.

Where does the main drain inside a pool lead too?

The pump

How do you close the main drain of your in ground swimming pool?

My pool has two main drain openings, to prevent entrapment. I use a Kreepy Krawly pool cleaner so the main drain stays closed all the time, otherwise, the Kreepy Krawly would get stuck every time it passes over the main drain. There is a valve located with the pool equipment (filter/pump/various valves) which is used to open and close the main drain. I'm no expert, but that's the way mine works.

Should main drain be closed or open when pool is running?


What are the pros and cons of having a main drain for an above-ground swimming pool?

The pro end of having a main drain is that you spend less time vacuuming the pool. By turning on the main drain only this will help clean the bottom of the pool and results in less overall maintenance time. Also helps clean up any chemical (chlorine, alkaline, shock, etc)that may not have completely dissolved when added to the pool. Also, when winterizing the pool, by having the main drain, you can lower the water level in the pool and still run a recirculating pattern on the filter without destrying the motor. same for opening the pool, can run the pool on main drain cleaning up the winter debris before the pool is completely full.

How do you use the bottom drain in an in-ground pool?

Well, if you mean to drain the pool --- it is not a drain as in house plumbing -- the sink -- the tub. It is connected to the skimmer and that is connected to the pump. Your main drain is most likely 'working'. It does not nave to be a strong flow. Well, if you mean to drain the pool --- it is not a drain as in house plumbing -- the sink -- the tub. IT DOES NOT DRAIN ANYTHING. It is connected to the skimmer and that is connected to the pump. Your main drain is most likely 'working'. It does not nave to be a strong flow.

Does the main drain line in skimmer have water in it when closing the pool?

It should not have water in it, especially if freezing weather is expected. Drain the pool to below skimmer line and drain the filter and filtration equipment.

People also asked