While pools often take center stage during the fall close-down season, spas and hot tubs need just as much attention when temperatures drop. Unlike pools, spas have compact plumbing systems with multiple jets, blowers, and equipment packed into a small space. That makes them especially vulnerable to freeze damage if not properly winterized. For service professionals, offering spa-specific close-downs is a business opportunity that protects equipment and reassures customers that their investment will survive the winter in perfect condition.
• Just as with pools, balancing spa water before draining is essential. High calcium, low pH, or unchecked sanitizer levels can leave scale, stains, or corrosion on the acrylic shell and
Don’t the Chemistry
plumbing surfaces during the winter months. A quick balance prevents unnecessary wear.
• Simply pulling the main drain plug isn’t enough. Spas have yards of hidden plumbing in a small footprint. Each jet line, airline, and pump housing can trap water. Service pros use wet/dry vacs or air compressors to blow out every line, making sure no pockets of water remain to freeze and crack fittings.
• Blower lines are especially prone to holding water. Left untreated, they can freeze solid and split. Blowers should be turned on for a few seconds after draining to push out lingering moisture, then disconnected or protected for the winter.
to the Blower and Store Filters
Equipment
Filters hold water like sponges. If left in place, that water expands during a freeze, damaging the media or cracking the plastic end caps. Filters should be cleaned, dried, and stored indoors for the winter.
Spas often sit outdoors year-round, making their control panels, heaters, and pumps easy targets for freeze damage and even rodent nesting. Leaving compartment doors open to “air out” can be a mistake — sealing them up tightly is better for winter storage. In rodent-prone areas, adding deterrents is worth doing.
Spa covers take a beating in winter. A dirty, waterlogged cover can freeze to the shell, making it hard to remove come spring. Cleaning, conditioning, and ensuring the cover is well-sealed
• Clean and Condition
• Don’t Forget the Interior Not to Close
reduces the risk of water intrusion and prolongs its life.
Acrylic spa shells can stain if water is left sitting. After draining, wiping down the surface with a non-abrasive cleaner helps preserve the finish. For portable spas, leaving a little spa-safe antifreeze in hard-to-reach plumbing areas is an extra safeguard.
Some homeowners use their spas year-round, even in cold climates. In that case, “winterizing” means something different: insulating well, keeping water chemistry balanced, and ensuring the cover seals tightly to conserve heat.
Backup power or freeze protection controls may also be worth discussing with customers who won’t be shutting down completely.
