How to Drain and Refill Your Hot Tub in Under an Hour

How to Drain and Refill Your Hot Tub in Under an Hour

Draining and refilling your hot tub is an essential part of maintenance. Over time, chemicals, body oils, and other contaminants build up, making the water cloudy or irritating to the skin. Fortunately, with the right approach, you can complete this task in under an hour.

Why You Need to Drain and Refill Your Hot Tub

Even with regular chemical balancing, hot tub water needs to be changed periodically. Here’s why:

• Buildup of Total Dissolved Solids (TDS) – Over time, minerals and contaminants accumulate, making it harder for chemicals to work effectively.
• Water Quality Decline – High levels of TDS can lead to cloudy water, skin irritation, and a strong chemical smell.
• Better Performance – Fresh water ensures your jets and heating system run efficiently.
• Prevents Bacteria Growth – Even well-maintained hot tubs can develop biofilm in the plumbing over time.

How Often Should You Drain Your Hot Tub?

The frequency of draining depends on use and maintenance, but here are some general guidelines:

• Every 3-4 months – For regular use.
• After heavy usage – If you’ve hosted a party or had multiple bathers.
• When water chemistry is unbalanced – If balancing chemicals isn’t working.
• If water looks or smells bad – Cloudy, foamy, or odorous water is a sign it’s time for a change.

Step-by-Step Guide to Draining and Refilling Your Hot Tub

Follow these steps to get the job done quickly and efficiently.

Step 1: Gather Your Supplies

Before you begin, make sure you have everything you need:

• Garden hose – For draining and refilling.
• Submersible pump (optional) – Drains water much faster than gravity draining.
• Bucket & sponge – To clean the interior.
• Hot tub cleaner – Removes residue and biofilm.
• Filter cleaner – Ensures your filters work efficiently.
• Fresh chemicals – To balance the water after refilling.

Step 2: Turn Off the Power

Never drain your hot tub while it’s still running. Turn off the power at the breaker to avoid damaging the pump and heater.

Step 3: Drain the Water

There are two ways to drain your hot tub:

• Using the Drain Spigot
  • Locate your hot tub’s drain valve (usually at the base).
  • Attach a garden hose and direct it to a safe drainage area.
  • Open the valve and let the water flow out.
• Using a Submersible Pump (Faster Method)
  • Place the pump at the lowest point inside the tub.
  • Connect a discharge hose and direct it away from your home.
  • Turn the pump on and watch it drain within minutes.

Step 4: Clean the Hot Tub

Once the water is fully drained:

• Use a non-abrasive cleaner to wipe down the interior.
• Scrub around the jets and waterline to remove residue.
• Rinse with clean water and wipe away any remaining cleaner.
• Remove the filters and clean them with a filter cleaning solution.

Step 5: Refill the Hot Tub

To refill efficiently and avoid airlocks:

• Attach a garden hose to the filter compartment to fill through the plumbing.
• Monitor the water level to avoid overfilling.
• Turn the power back on once the water reaches the recommended level.

Step 6: Balance the Water Chemistry

After refilling, test and adjust your water chemistry:

• Sanitizer (Chlorine or Bromine): 3-5 ppm
• pH Level: 7.4-7.6
• Total Alkalinity: 80-120 ppm
• Calcium Hardness: 150-250 ppm

Use the appropriate chemicals to adjust each level as needed.

Step 7: Run the Jets & Enjoy

Once the water is balanced:

• Turn on the jets to circulate the chemicals.
• Let the water heat up to your preferred temperature (typically 100-104°F).
• Cover the tub to retain heat and keep it clean.

Tips to Make the Process Faster

• Use a submersible pump to speed up draining.
• Refill through the filter compartment to prevent airlocks.
• Pre-dissolve chemicals before adding them to avoid cloudiness.
• Keep filters clean to maintain water clarity longer.

Regularly draining and refilling your hot tub keeps the water fresh, prevents equipment issues, and ensures a better soaking experience. Stick to a routine, and your hot tub will always be ready for relaxation.