Pool Pump Winterizing: Step-by-Step Guide

Why Winterizing Matters

When water freezes, it expands. If water remains inside your pool pump during freezing temperatures, the ice can crack the pump housing, damage the impeller, or break internal seals. Winterizing removes water from the pump and its connected plumbing to prevent this damage.

The exact steps depend on your pump type and your local climate. This guide covers the general process, but always check your pump's manual for model-specific instructions. If you are unsure about any step, especially electrical disconnection, contact a licensed electrician or your pump manufacturer. For more on choosing a pump that is easy to maintain, see our guide to above-ground pool pumps.

• Prevents freeze damage to the pump housing and internal parts
• Protects the pump's seals and gaskets from drying out or cracking
• Makes spring startup easier and avoids costly repairs

Before You Begin

Before starting, gather the tools you may need: a screwdriver, a wrench for drain plugs, a bucket, and a shop vacuum or wet/dry vacuum. You will also need a place to store the pump if you plan to remove it, such as a garage or shed.

Check your pump's manual for the location of drain plugs and any specific winterizing instructions. Some pumps have a single drain plug, while others have multiple. The manual will also tell you if the pump can be stored outdoors or must be brought indoors. If you are considering a new pump, look for models with accessible drain plugs; our best inground pool pumps guide can help.

• Read the manufacturer's manual for your specific pump model
• Turn off power to the pump at the circuit breaker before doing any work
• Close any valves that isolate the pump from the pool

Step-by-Step Winterizing Process

Follow these steps in order to winterize your pool pump. The process is similar for most pumps, but always defer to your manual.

First, turn off power to the pump at the circuit breaker. This is a safety step and should be done before touching any part of the pump. If you are unsure how to do this, consult a licensed electrician.

Next, remove the drain plugs from the pump housing. Place them in a safe place so you do not lose them. Allow all water to drain from the pump. You may need to tilt the pump to get all the water out.

After draining, use a shop vacuum to remove any remaining water from the pump housing and the suction and discharge lines, if accessible. This helps prevent ice from forming in low spots.

If your pump has a strainer basket, remove it and clean it. Store it with the drain plugs so you do not misplace them.

For above-ground pumps, you may need to disconnect the hoses from the pump and store the pump indoors. Check your manual for guidance. For inground pumps, you may leave the pump in place if it is properly drained, but consider covering it to protect it from the elements. If you are shopping for a pump that is easier to winterize, consider a variable speed pump.

• Turn off power at the breaker
• Remove drain plugs and let water drain completely
• Use a shop vacuum to remove residual water
• Clean and store the strainer basket
• Disconnect hoses for above-ground pumps, if applicable
• Store the pump in a dry location if possible

Above-Ground vs. Inground Pumps

Above-ground pool pumps are often easier to winterize because they are portable. You can disconnect the hoses, drain the pump, and bring it indoors for the winter. This protects it from freezing temperatures and harsh weather. For more on choosing an above-ground pump, see our best above-ground pool pumps guide.

Inground pool pumps are typically installed in a permanent location, often near the pool equipment pad. You may not be able to move them easily. For these pumps, thorough draining is essential. Some inground pumps have a drain plug at the bottom of the housing; removing it allows water to escape. You may also need to blow out the plumbing lines with compressed air, but this is a job for a professional if you are not experienced.

Regardless of pump type, always follow the manufacturer's instructions. If you are unsure about any step, contact a pool professional. For a pump with clear winterizing instructions, consider models from our best dual speed pool pumps list.

Storing the Pump

If you remove the pump for storage, choose a dry, protected location such as a garage or shed. Avoid areas where the pump could be exposed to freezing temperatures or moisture.

Before storing, make sure the pump is completely dry. You can wipe down the exterior with a cloth. Store the pump in its original box if you have it, or cover it with a tarp to keep dust off.

Keep the drain plugs and strainer basket with the pump so they are ready for spring. Some owners label the plugs to remember where they go. If you are looking for a pump that is easy to store, check out our best sand filter pump for above ground pools.

Preparing for Spring Startup

When the weather warms, you will need to reverse the winterizing process. Reinstall the drain plugs, reconnect hoses (for above-ground pumps), and ensure all connections are tight.

Before turning the pump back on, check the manual for any priming instructions. Some pumps require you to fill the strainer basket with water before starting. This helps the pump prime properly.

If you are unsure about any step, consult your pump's manual or a pool professional. A proper spring startup will help your pump last longer. For more on pump maintenance, see our pool pump summer maintenance article.

What to pick for your situation

Questions

Do you need to remove the drain plugs from your pool pump for winter?

Yes, removing drain plugs allows water to escape from the pump housing, preventing freeze damage. Always check your manual for the exact location of drain plugs and follow the manufacturer's instructions.

Can you leave your above-ground pool pump outside in winter?

It depends on your climate and the pump's design. Many above-ground pumps can be stored indoors for winter. If you leave it outside, ensure it is completely drained and protected from the elements. Check your manual for guidance.

What should you do with the strainer basket during winter?

Remove the strainer basket, clean it, and store it with the drain plugs. This prevents debris from freezing and damaging the basket or the pump housing.

Do you need to blow out the plumbing lines when winterizing your pump?

For inground pools, blowing out the plumbing lines with compressed air is often recommended to remove water from the pipes. This is a job for a professional if you are not experienced. For above-ground pools, disconnecting hoses and draining them may be sufficient.

Can you use antifreeze in your pool pump for winter?

No, do not use automotive antifreeze in your pool system. It is toxic and can damage the pump. Follow the manufacturer's recommendations for winterizing, which typically involve draining water, not adding chemicals.