Draining and Refilling a Hot Tub in Winter Without Freeze Damage

Published November 11, 2026 · A Clear Alternative Water, Pennsauken NJ, since 1991

You can drain and refill a hot tub in a South Jersey winter, but only if you plan around the cold. Pick a day when the temperature stays above freezing, ideally 40°F or warmer, and do the whole job in one stretch so the plumbing is never left empty overnight. Refill right away, put the cover back on, and get the heater and circulation pump running as soon as the water is above the jets. Many people put this job off because the outside spigot is shut off for winter. Water delivery by truck solves that and cuts the fill to minutes. A Clear Alternative delivers hot tub and pool water across Burlington, Camden, Gloucester, Atlantic, Salem, Cape May, Mercer and Monmouth counties. Call 856-856-5210.

Why Winter Refills Are Riskier

A hot tub that is full, covered and running protects itself. The heater and freeze protection mode keep water moving through the pipes. An empty tub has none of that. Water left in the jets, pump and heater housing can freeze and crack them, and those repairs can cost far more than a season of normal care.

One major hot tub maker tells owners not to drain a tub in freezing weather and to schedule the job for a day above 40°F. The goal is simple: the tub should spend as little time empty as possible.

Should You Wait Until Spring?

Not always. The Pool and Hot Tub Alliance recommends draining and refilling a hot tub every three to four months, and heavy use over the holidays can wear water out faster. Signs it is time even in winter:

• Water stays cloudy or foamy no matter how you adjust the chemistry.
• Sanitizer gets used up much faster than usual.
• A stale or chemical smell that does not go away with shocking.
• You have just cleaned a filter that came out very dirty, or you are switching sanitizers.

If none of these apply and you are close to the three-month mark, it is fine to wait for a mild stretch. Our guide on how often to drain and refill a hot tub covers the schedule in more detail.

Step by Step: A Same-Day Winter Refill

1. Check the forecast. Choose a day that stays above freezing, ideally 40°F or warmer, with no hard freeze expected that night.
2. Book the water first. Have your delivery set for the same morning so the tub is not left empty waiting on a hose.
3. Turn off power at the breaker before you drain.
4. Drain and clean quickly. Wipe the shell, rinse or swap the filter and check the cover. Do not leave the tub empty while you run errands.
5. Refill through the filter well if your manual says to, which helps push air out of the plumbing.
6. Restore power once the water is above the jets and the filter is back in.
7. Close the cover and let the heater bring the water up to temperature.

If your tub was winterized with antifreeze, flush it out completely before refilling, following the manufacturer's directions.

Getting Water When the Spigot Is Off

In winter, most South Jersey homes have the outside hose spigot shut off from inside so it cannot freeze. Turning it back on, running a hose across a cold yard and then draining it all again is a hassle, and a hose left out overnight can freeze solid. A hot tub holds a few hundred gallons, so delivery is quick. We use a smaller truck for hot tubs, and the hose runs straight from the truck to the tub, so you do not have to touch your outside plumbing. See our hot tub water delivery page for details.

Balancing the Water After a Fill

Fresh fill water needs to be tested and balanced before anyone gets in. The CDC recommends these levels for home hot tubs:

• Free chlorine of at least 3 parts per million, or bromine of 4 to 8 parts per million
• pH between 7.0 and 7.8
• Water temperature no higher than 104°F

Test with strips or a test kit once the water is warm and circulating, adjust in small steps, and retest. Your hot tub's manual and your local pool store can help with alkalinity and calcium hardness.

Keeping It Safe Until Spring

Once the tub is full again, the Pool and Hot Tub Alliance advises using freeze protection mode, keeping the cover secured and checking the water level often. Wind can pull a loose cover off and drop the water temperature fast. If you lose power during a storm, check the tub as soon as it comes back, and call a hot tub technician if the heater or pump will not restart.

Common Winter Refill Mistakes

• Draining the night before. It is tempting to let the tub drain overnight and refill in the morning, but an overnight frost can do real damage to an empty tub.
• Powering up too early. Running the pump or heater before the water is above the jets can damage them. Wait until the level is right.
• Leaving the hose out. A garden hose left on the lawn after a winter fill can freeze and split, and the spigot behind it can crack too.
• Skipping the filter. Refilling with a dirty filter puts old debris right back into fresh water. Rinse it well or swap in a clean spare.
• Forgetting the cover straps. Winter winds in South Jersey, especially near the shore, can lift a cover that is not latched.

Shore Homes and Weekend Tubs

Many Cape May, Atlantic and Monmouth County shore homes have a hot tub that sits through the winter and only gets used on holiday weekends. If the tub was left running, check the water level and chemistry before guests arrive, and plan any drain and refill for a mild day at least a day ahead so the heater has time to catch up. If the tub was drained and winterized for the season, follow the manufacturer's steps to bring it back, flush any antifreeze, and line up the water delivery for the same visit so you are not driving down twice. Rental owners often book a refill between longer stays so every group gets fresh water.

Serving Eight South Jersey Counties

We deliver hot tub water in Burlington, Camden, Gloucester, Atlantic, Salem, Cape May, Mercer and Monmouth counties, including shore homes that only use the tub on winter weekends. Check our service areas for your town.

When to Call A Clear Alternative

Call us when you see a mild day coming and want the tub drained and refilled in one stretch, when your spigot is shut for winter, or when you are opening a shore house tub for a holiday weekend. A Clear Alternative is a family-run company based at 9230 Collins Ave in Pennsauken, in business since 1991. Call 856-856-5210 any time, call the office at 856-663-8088, or request a quote online.

Frequently Asked Questions

Can I drain my hot tub in winter?

Yes, on a day that stays above freezing, ideally 40°F or warmer. Do the drain, cleaning and refill in one stretch so the plumbing is not left empty.

How often should a hot tub be drained and refilled?

The Pool and Hot Tub Alliance recommends every three to four months, or sooner with heavy use.

What if my outside spigot is off for the winter?

Water delivery by truck fills the tub directly, so you do not need to turn your outside spigot back on.

Do you deliver heated water?

No. We deliver cold water, and your hot tub heater brings it up to temperature once the tub is full and running.

What chemical levels should a hot tub have after a refill?

The CDC recommends free chlorine of at least 3 ppm or bromine of 4 to 8 ppm, pH 7.0 to 7.8, and a temperature no higher than 104°F.