Opening a pool that has been correctly winterized or looked after during the off-season typically requires minimal effort to get it up and running for the new season. However, if the pool was left unattended, the reopening process might be more challenging, potentially involving the removal of algae, dealing with plaster stains, and cleaning out dirty equipment.

Regardless of the pool's condition, it's essential to methodically restart and inspect all equipment as part of the standard reopening steps.

First, ensure the pool's water level is restored to its operational norm before powering up the system. It's common for pool service professionals to request that the owner refills the pool to expedite the process.

Before taking off the pool cover, it's necessary to remove any standing water on top, along with leaves and other debris. A leaf blower can speed up this step, and it's also wise to sweep away any debris from around the pool area to prevent it from getting back into the pool.

Following this, the cover should be taken off, cleaned, dried, folded, and stored properly.

Remove all winterizing plugs from the return lines, cleaner lines, skimmers, and other fittings. If antifreeze was used during winterizing, it can be removed from the suction line by turning the multiport valve to “waste” for DE or sand filters. For cartridge filters, use a wet-dry shop vacuum on the skimmer line to pull it out.

Next, reinstall any accessory equipment such as ladders and diving boards, making sure that all safety features like ladder bumpers and fulcrum pads are securely in place.

When reinstalling essential equipment like pumps, motors, filters, and heaters, ensure they are free of debris and rodent detritus. Reconnect all grounding and bonding wires.

For variable-speed pumps, verify the motor spins in the correct direction, which depends on the accurate connection of the hot wires.

Inspect the multiport valve before reinstallation. You may need to replace the spoke gasket. Lubricate the diverter shaft and gasket with non-petroleum grease before reassembling.

With the equipment set up, turn your attention to the pool itself.

Remove all surface and submerged leaves and debris using a leaf net.

Brush down the pool walls and floor thoroughly.

Prime and start the pump. If using DE filters, add DE once the system is operational.

Inspect and start the heater, ensuring the burner tray is free from any rodent droppings and insects to prevent hazards. Test fire the heater and clean it if necessary.

Address any leaks in the system promptly.

For clear water, operate the filter continuously for 24 hours, then test the water the following day and adjust water chemistry as required.

If the water appears cloudy, adjust the pH level, shock the pool, and let the filter run for another 24 hours.

The next day, perform a backwash or clean the filter as needed, then correct the water chemistry.