At times it comes to a point when you have to drain your pool. It could be for maintenance or to replace the water after so many years of use. Over the years, the (TDS) Total Dissolved Solids level in your swimming pool accumulates to a point where it becomes hard to maintain the chemistry. If your pool Total Dissolved Solids gets too high, you may start noticing mineral stains in your pool walls and floor. If you do not lower the TDS, the surface material used in your pool will deteriorate. Since it may be difficult to decrease the TDS, draining the water may be the only solution. Here is a complete. step by step guide on how to drain a pool, applicable to both inground and above ground pool.
Before you start draining your pool, there are some factors that you need to consider. You need to first close the return lines to your pool and ensure that as the water level drops, you don’t let air into the suction lines of your pool. If this does occur, your pool pump will loose prime and water will stop flowing. Lastly, you have to know where you will dump your waste water.
Close the return lines. The pool water usually cycles through the filter of your pool and then gets back to the pool. If it’s in the filter mode, there will be no more extra water getting into the pool so you don’t have to worry about closing the return lines. Also if you were supposed to shut off the return line and open the waste line, then the waste line will not be big enough to deal with the GPM pressure that’s produced by the pump. This is truer especially if you decide to drain your pool with a garden hose.
Open the waste line. If you have a DE filter or a sand filter, shut off the pump and turn around the handle that’s located on the multiport valve to WASTE mode. Ensure there is a waste line that’s connected to the waste port and then rotate the pump back on.
Open the waste line. If you have a cartridge filter, you will need to open up the ball valve that leads to the waste line. If you have a hose outlet to cleanse your swimming pool water, then it might be wise to replace it with a 1 1/2″ ball valve.
Close the top suction lines. When your water level comes to half way down the skimmer opening, then it means you need to close the skimmer suction line so as to block air getting sucked into the suction line and then closing the pump motor. If your pool has a suction port that’s meant for the suction cleaner, you may want to close that also. In general, the suction lines are usually controlled by dedicated diverter valves.
Examine the main drain operation. When you close all the suction lines but leave the main drain, ensure the diverter valve to the main drain is completely open and that the drain is not fully blocked. If it’s blocked, you will notice an obvious drop of water via the pumps strain cover. If the main drain is blocked, you may have to look for a submerged pump so that you keep it in the floor of the pool. It should have its own waste hose.
Make sure you know the water discharge regulations in your state. Most municipalities do not allow dumping pool water in the streets. You may want to check with your municipality on how to dump your pool water. If you dump water into your sewer lines, you may risk running too much water and likely back up the house. It’s important to decrease the GPM into the clean out to 12 gallons per minute and no more than that. If you are using a ball valve, simply close the valve down to half. In case you are using the WASTE setting in a multiport valve, you could try and add a ball valve towards the end of your waste port to minimize the flow.
Continuously check the pump and the discharge all through the entire process. Depending on the size of your pool, the entire process can take between 4 to 8 hours. Try and work faster on your pool and start refilling the pool as fast as you can.
Draining Above Ground Pool
Most above ground pools usually have one hose coming out of the pool and another hose that returns to the pool. Since there is no main drain in majority of above ground pools, you will simply need to decrease the water to the bottom of the intake or skimmer with your above ground pool filter system.
• You can drain your above ground pool with a small submersible electric pump and a garden hose or drain with a vacuum hose or with different garden hoses.
• Pump the water away from the edge of the pool so that you don’t water log the soil that’s holding the pool.
• Check the draining and the discharge. Draining your pool may take several days, but a small submersible pump will take you about 6 to 12 hours.
• Try and work fast so that you clean the floor if necessary and refill your pool as fast as possible.
A completely empty pool and an exposed liner on a hot day can result to shrinking of the liner due to heat and damage it completely. In addition, an empty pool is also likely to collapse especially when there are heavy winds.