DIY 101: How to Winterize Your Pool Like a Pro

Step 1: Clean Your Pool Thoroughly

• Remove all debris using a skimmer net.
• Brush the walls and floor to loosen dirt and algae.
• Vacuum the pool to remove fine particles.
• Clean or backwash the filter system.

Step 2: Drain the Pool Below the Skimmer

1. Turn Off the Filter System: Power down the system to prepare for draining.
2. Backwash the Filter:
   • Set your multi-port valve to backwash and the valve to the main drain.
   • Turn the filter on and let it run until the site glass is clear (usually about 2 minutes).
   • Shut off the filter system.
3. Drain Using the Waste Setting:
   • Turn the multi-port valve to waste and turn the system back on.
   • Let the pool water drain until it’s a few inches below the skimmer.

Step 3: Blow Out the Lines

Blowing out the lines prevents freezing water from damaging pipes. If your system includes a heater or complicated plumbing, consider hiring an expert to ensure it’s done correctly. But if you decide to complete this step by yourself, you will need:

• Air compressor, shop vac, or pool blower (specialized for pool lines).
• Pool plugs to seal the lines after blowing them out.
• Pool antifreeze (optional, for extra protection).

1. Blow Out the Skimmer Line:

   • Connect the air compressor or blower to the skimmer line using a fitting adapter.
   • Turn on the compressor to push air through the skimmer line until you see water bubbling out of the nearest return line or the pool.
   • Once water stops flowing and only air is coming through, seal the skimmer line with a pool plug to prevent air or water from re-entering.

2. Blow Out the Return Lines:

   • Attach the blower to the return line at the equipment pad or another access point.
   • Turn on the blower and watch for water bubbles coming out of the pool’s return jets.
   • Once only air is coming out of the jets, plug each return jet with a pool plug to keep the lines dry.

3. Blow Out the Main Drain (Optional):

   • If your pool has a main drain, use the blower to clear it as well.
   • You’ll know the line is clear when air bubbles rise continuously from the main drain at the bottom of the pool.
   • Once clear, quickly close the valve leading to the main drain to create an air lock, which prevents water from re-entering.

4. Add Pool Antifreeze (Optional):

   • For additional protection, pour non-toxic pool antifreeze into any pipes or fittings that may still hold residual water, such as the skimmer or return lines.

Step 4: Add Winterizing Chemicals

Use a winter chemical kit designed for pool winterization to keep your water clean and algae-free:

• Shock the Pool: Add a chlorine-based shock to sanitize the water.
• Add Algaecide: Prevent algae from forming during the off-season.
• pH Adjusters: Ensure your water chemistry is balanced, with pH levels between 7.2–7.8.
• Optional Additions: Use metal sequestrants if your water source has high metal content.

Step 5: Cover the Pool

• Install a Sturdy Pool Cover: Use a safety cover or tarp to keep debris out and prevent algae growth.
• Secure the Cover: For in-ground pools, ensure the cover is tightly secured. For above-ground pools, use an air pillow beneath the cover and water bags to weigh it down.