You may see pool equipment advertised online at discounted prices through auction websites such as eBay and non-authorized dealer websites. While purchasing the equipment at a discount might be tempting, there is a very big chance it will end up costing you more in the long run. There is always a chance the equipment you are buying is not what you think it is and may be refurbished, but the major hindrance of purchasing online directly rather than through a licensed contractor is warranty.
When manufactures sell directly to consumers online, they only offer a 60-day warranty. When you purchase equipment through a licensed contractor and have it professionally installed, the warranty is extended to three years on most equipment. This is because manufacturers were seeing a high volume of improper installations and equipment failure due to faulty installations when consumers purchased equipment directly online.
As with most things, when something seems too good to be true, it probably is and even though you may save money purchasing the equipment upfront, you will end up paying more in the long run. Your pool is an investment and not something you want to put in the hands of the biggest discounter.