Part of hot tub maintenance includes draining and refilling the tub. While you can use a professional service for this, most small hot tubs are easy DIY projects. You should follow the manufacturer’s directions to prevent damage and maintain any warranties.
Draining your hot tub
Turn off the jets, pumps and heater before you begin. You should also unplug the unit or shut the power off at the circuit breaker. Consider where you will be draining the water. Your city or county may have ordinances that prevent draining water into a storm sewer. You also want to avoid emptying the water onto your lawn to prevent damage or possible flooding.
If your hot tub does not have a drain, you will need to use a pump or siphon and a hose. Otherwise, locate the hose bib and attach the appropriate hose. Turn the valve or handle to the left to allow the tub to drain. If you are draining the tub for winterizing, you still need clean it before closing it for the season.
You can add a chemical flush to your tub and allow it to circulate before you start the draining process. Do check your owner’s manual to ensure that using this type of product will not void your warranty.
Cleaning the tub
Once the majority of the water has drained, you can dry any remaining moisture with a soft towel. Do follow the manufacturer’s recommendations for the products you use to clean the interior of the tub. Make sure that you clean away any scum, algae and other debris. You may need to rinse the interior after cleaning to remove any residual cleaning product.
Filling your hot tub
When you are ready to fill your hot tub, close the drain valve. You should consider using a city or county water supply over well water for filling. Fill the tub to the normal operating level, which should be above the filter line. Turn the main power back on but leave the heating system off.
The pump needs to be turned on and may require priming. To prime the pump, turn it on for a few seconds. Next, shut it off and wait about 10 seconds and turn it on again. Turn on all jets to circulate the water and remove air from the system. You will need to allow the hot tub to run for a couple of hours for full circulation.
Remember to check the chemical balance after filling your tub. Chemicals are normally added when the pump is circulating water to allow them to work correctly. You should check the filters and clean or replace them as needed. Draining and filling should be done every three to six months depending on the amount the hot tub is used. If you do not have your manual, information can often be found online.