The Proper Way to Close Down Your Fiberglass Pool

The Proper Way to Close Down Your Fiberglass Pool

September 11, 2023

New,Modern,Fiberglass,Plastic,Swimming,Pool,Entrance,Step,With,CleanClosing down your fiberglass pool properly at the end of the swimming season is important to ensure it remains in top condition and ready for use when the next summer arrives. This blog post will guide you through the proper steps required to safely and effectively close down your fiberglass pool.

1. Gather the necessary materials:

Before starting the pool closing process, make sure you have all the necessary pool supplies handy. This may include a pool cover, winterizing chemicals, a pool vacuum, a skimmer net, a pool brush, and a pool winterizing kit. Having these materials readily available will save you time and effort.

2. Clean the pool:

Begin the closing process by thoroughly cleaning your fiberglass pool. Remove any debris, such as leaves, twigs, or insects, using a pool skimmer net. Vacuum the pool floor to eliminate any dirt or algae buildup. Use a pool brush to scrub the walls and floor to remove any remaining grime or stains. A clean pool will ensure that no organic matter is left behind to cause issues during the off-season.

3. Balance the water chemistry:

Testing and balancing the pool water chemistry is crucial before closing it down. Adjust the pH, alkalinity, and calcium hardness levels based on the manufacturer’s recommendations. You may also consider using a winterizing kit specifically designed for fiberglass pools to prevent algae growth and protect the pool’s surface during the colder months.

4. Lower the water level:

To avoid damage caused by freezing temperatures, it is important to lower the water level. Fiberglass pools do not require the water to be completely drained, unlike some other pool types. Aim to lower the water level to a couple of inches below the skimmer. This will allow room for expansion in case of freezing without putting excessive strain on the pool structure.

5. Disconnect and drain pool equipment:

Before closing down the pool, disconnect and drain any pool equipment such as pumps, filters, heaters, and chlorinators. Remove and clean the pool ladder or steps, ensuring they are fully dry before storing them away for the off-season. This prevents damage to the equipment due to freezing temperatures and prolongs their lifespan.

6. Winterize the plumbing system:

To protect the pool’s plumbing system from potential freeze damage, it is crucial to winterize it properly. Begin by blowing out the lines using a shop vac or an air compressor, ensuring that all water is removed from the plumbing system. Add pool antifreeze to the lines to prevent any residual water from freezing. Additionally, consider installing freeze plugs or expansion disks in the skimmer and return lines to further prevent damage.

7. Install the pool cover:

Once the necessary preparations have been made, it’s time to install a high-quality pool cover. This will help keep leaves, debris, and rainwater out of the pool during the off-season. Ensure that the cover fits properly and is securely fastened. Consider using a cover pump to remove excess water from the top of the cover to prevent it from accumulating and causing damage.


Properly closing down your fiberglass pool is essential to maintain its longevity and prevent any potential issues during the off-season. By following these steps, you can ensure that your pool remains in optimal condition and ready for enjoyment when summer comes around again. Don’t overlook the importance of proper pool closing procedures – it’s an investment that will pay off in the long run!

Got Questions? Let Us Help!

Welcome to A-1 Pools & Spas! A-1 Pools & Spas is a family-owned pool contractor and supply store! Since 1983, we’ve been installing and maintaining residential pools for our community around Oxford, Connecticut! Whether you need a pool designed and constructed or your current pool renovated, we are here to help! A-1 Pools & Spas offers complete service and weekly maintenance of all pools which includes cleaning, pump replacements, heater replacements, and more! Our store also carries all a wide selection of pool and spa supplies, accessories, and toys. We even have spas for sale. Contact us today!

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