Tips to follow to ensure it’s done properly
The in- ground pools should only partially be drained to stabilize the total dissolved solids or if a repair is required. Check your pool chemistry. Drain only if it exceeds 1,500 pars per million (ppm), or the calcium hardness exceeds 350.
1. Drain your pool or spa directly to the sewer system, which allows the water to be recycled and reused.
2. Locate your sewer clean out port.
3. Shut off the power to the filtration system at the circuit – breaker and turn off the automatic water fill valve.
4. run a drain hose from the sewer clan -out port to the pool or spa, and connect it to a submersible pump. Lower the pump into the deepest water. Don’t allow the hose to obstruct other flows from your home from passing through the sewer pipe.
5. Make sure the pump capacity does not exceed the sewer line capacity.
6. If the water backs up stop draining call a professional plumber.
7. Refill your pool or spa as soon possible. Direct sun light can damage the plaster. Empty pools can be cracked or damaged by the pressure of surrounding soil.
8. Check the levels everyday for a week and adjust chemicals as needed.
Find your clean out port
It could be hidden by landscaping and may be visible
The port usually located at ground level in the landscaped area of the front yard close to the home. Some sewer ports may be embedded in the driveway or garage floor.
Check beneath and around landscaping, which may be concealing the port.
The sewer clean-out port will likely be 3-4 inches in diameter and have a clamped, rubber cover or threaded cap.
Some sewer ports may be within a wall. These ports may be smaller and don’t have a straight path to the sewer, increasing the potential for a backup.
If there are two ports in the ground this may indicate a “U” fitting. Use the one near your home.
I hope this was helpful