How Often do I need to Drain my spa or hot tub?
Draining your spa or hot tub is a very important factor in caring
for your spa, the spa's components & more importantly, the people using the spa.
Draining & refilling too often is a waste of your time & the valuable
resource of water. Not draining & refilling often enough will lead to hot
water care problems which can lead to excessive bacterial growth which can lead
to skin rashes, possible ear infections, "hot tub lung" & other physical health
Purging, draining & refilling helps to rid your spa of
unwanted mold, bacteria & bio-films.
The formula is pretty simple. Take the
number of gallons in the spa divided by the average daily bather load then
divide that number by 3 to get your answer.
First example: a spa or hot tub with 300
gallons of water that is used by 2 people twice each day 5 - 7days (equals
bather load of 4)
300 ÷ 4 = 75 ÷ 3 = 25 days or about once per month.
Second example: a spa or hot tub with 300
gallons of water that is used by 2 people once each day 5 - 7days (equals bather
load of 2)
300 ÷ 2 = 150 ÷ 3 = 50 days or about once every 2 months.
Why so often? Each person using a spa or hot
tub "relieves" themselves of about 1 pint (16 oz) of body fluids per 20 minute
soak. Now multiply that more than one person - as in a party - and the body
fluids add up!
This formula is not concrete, HOWEVER it is a
good guideline to follow. Depending on how much the spa is used directly
determines how often it needs to be drained & refilled. It may seem like a
lot but consider this: if you were soaking in a bathtub every night, how
often would you drain & refill the tub? Every time you used it, right?
Remember that most commercial spas need to
drain & refill their spas at least once per week! Or they should!
A good tell tale sign that a spa's water
needs to be changed is the water is very foamy and the antifoam your adding has
minimal effect and/or the water doesn't smell clean. When in doubt, drain
it out. It may seem like a pain, but your health & safety is our first
3 steps for
a proper Purge, Drain & Refill.
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