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If it still works, it will open before the pool is completely empty. But are you sure the valve is hydrostatic?
If it is not, then you will need to shop-vac the water remaining over the bottom drain, remove the drain cover, shop-vac the water under the cover, and then remove the lug nut and slide out the (manual) relief valve.
What else can I help you with?
Why is the lawn sprinkler head leaks water when the main water valve is shut off?
After a main water valve is closed the system's PVC pipes are still full of water and will drain to the lowest sprinkler head until the system is empty.
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.
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.
Is there a shower drain with a built in check valve?
You can get a back water valve. It is similar to a check vale/ the back water valve goes on your main sewer line out side of home. It is desined to stop black water form coming into your home if main line stops up. Thay do make a device that can be installed into an exsisting drain it lets water through your drain but will not let water back up through you shower drain.
How can you figure out which valve on your filter system is the main drain?
If you look at the pipe that is going into the filter pump you will notice that it has a tee that is peceeded by two or three pipes comming up from the ground. Those will be from the skimmer, main drain, and if you have one from the cleaner. If you observe the flow of water in the skimmer then change the valve so there is no more water flowing that will be the one going to the main drain or cleaner. Repeat the process to eliminate which one is the cleaner. Which ever one is left is the main drain.
When your pump is on it sends water out the drain in your back yardno matter if you have the main drain valve closed or open How do you fix this problem?
Is this a sand filter? How many valves control the flow of water? It appears the b/w valve is defective.
Does a Daewoo nubira radiator have a drain plug?
No. to drain your radiator just undo the main bottom hose until it is empty then tighten it back up & refill the coolant system.
If your vinyl pool went through Hurricane Katrina how much can you empty it to get it clean?
You can completely drain just do not leave empty for very many days or it may float like a boat.If you have a dew drain water will continue to come back into the pool from the main drain if the water table is high enough.
What are the steps involved in replacing the main water shut off valve?
The steps involved in replacing the main water shut off valve are: Turn off the main water supply to the house. Drain any remaining water in the pipes. Remove the old shut off valve. Install the new shut off valve. Turn the main water supply back on and check for leaks.
What does a trumpet have that opens and closes?
on the main tunning slide and third valve slide there should be a spit valve, its used to empty your spit from the instrument. some trumpets have more then the two common spit valves.
How back flush fire dept connections?
HOW TO BACK FLUSH FIRE DEPT. CONNECTSby shutting off main water supply from city via the shut off valve. Then release water pressure via aux drain, main drain and inspectors test valve. assure all water is drained from Fire sprinkler system check gauges should ready zero PSI. Next locate clapper valve it will be on back side of double check valves. disassemble pipe work you will see clapper valve, reverse it ( be careful with seal or gasket not to tear) once clapper valve is reversed re assemble pipe work close main, aux and inspectors test valves. Open main valve from city water feed. You will see water is now flow through FDC clearing all debris letflow for approximately 3 minutes ( Be careful not to flood area or damage landscaping) When debris is clear? Shut off main city feed valve dis assemble pipe work restore clapper valve to normal position. Next open city water feed valve you will see water coming from main, aux and inspectors test drains close main drain valve then aux drain valve and then inspectors test valve. you will see water gauges return to approx 165 PSI then replace covers on FDC. Then Job is completed.
How can you move ground water away from an inground pool dig?
First of all if the water table it too high you do not want to drain at all for your pool will act like a boat and float up out of the ground. If you are going to empty and refill rather quickly say 3 days or less. In the main drain of your pool there is a check valve that allows ground water to seep into the pool so when the water table gets to high your pool don't float. The valve is a one way valve that pops up when ground water is refilling your pool.Put a brick or something heavy over the valve to prevent it from opening and pump out your pool.Be sure to refill pool soon. Kenny Kummer Brody chemical
