You filled your hot tub a few days ago, but the water level already seems lower.
Is it normal evaporation or is your hot tub actually leaking?
Some water loss is completely normal. Water leaves the spa through evaporation, splashing and regular use. But if you're constantly reaching for the hose to top up your hot tub, there's a good chance something else is going on.
A leaking hot tub isn't something you want to ignore. Even a relatively small leak can waste water and potentially lead to additional problems if you allow it to continue.
Here's what could be causing your hot tub to lose water and what you should look for.
First: How Much Water Loss Is Normal?
Before assuming you have a leak, remember that every hot tub loses some water naturally.
Evaporation can vary depending on:
- Outdoor temperature
- Water temperature
- Humidity
- Wind
- How frequently the spa is used
- How long the cover is left open
- How much splashing occurs
Hot tubs can lose water faster during periods of frequent use, especially when several people are getting in and out regularly.
The important thing is recognizing a change from what's normal for your spa.
If you're suddenly adding considerably more water than you used to, it's worth investigating.
1. Check Around the Hot Tub for Water
Start with the obvious.
Walk around your hot tub and look for moisture, pooling water or consistently damp areas.
Pay particular attention to:
- Around the base of the spa
- Inside accessible cabinet areas
- Around pumps and equipment
- Plumbing connections
- The ground surrounding the hot tub
Remember that water can travel before becoming visible. The location where you see water isn't necessarily where the leak originated.
That's one reason hot tub leak detection can sometimes be more complicated than it appears.
2. Check the Pumps and Equipment
Your hot tub's equipment area contains several components and connections that can potentially develop leaks.
Seals, fittings, unions and other components can deteriorate or loosen over time.
If you're comfortable safely inspecting the equipment compartment, look for obvious moisture or signs that water has been present.
However, avoid attempting repairs involving electrical components or equipment you're unfamiliar with. Water and electrical systems are not something to experiment with.
3. Plumbing Connections Can Develop Leaks
Behind the cabinet is an entire network of plumbing carrying water throughout your spa.
A leak can develop at:
- Plumbing joints
- Connections
- Fittings
- Jet bodies
- Valves
- Other plumbing components
Some leaks are easy to identify.
Others may be hidden behind insulation or inside areas that aren't easily accessible without removing portions of the cabinet.
If the source isn't obvious, professional leak detection can save a lot of unnecessary guesswork.
4. Jet Fittings Can Be the Culprit
Your hot tub jets aren't simply openings in the shell.
They're connected to plumbing behind the spa, and the fittings and seals surrounding them can potentially develop leaks.
If the water level consistently drops to approximately the same height and then seems to stop, that can sometimes provide a clue about where the problem may be located.
For example, if the water repeatedly settles near the level of a particular jet or fitting, that area may deserve closer inspection.
It doesn't automatically identify the leak, but it can help narrow down the search.
5. Look at the Spa Shell
Hot tub shells are designed to be durable, but damage can occur.
Inspect visible surfaces for:
- Cracks
- Damage
- Separation around fittings
- Areas that look different from the surrounding acrylic
Not every visible mark is responsible for water loss, so don't automatically assume a cosmetic imperfection is the source.
If you suspect shell damage, have it properly assessed before attempting a DIY repair.
6. Don't Forget the Drain
Sometimes the problem is surprisingly simple.
Check your hot tub's drain assembly and make sure everything is properly closed and secured.
A small issue around the drain can lead to gradual water loss that isn't immediately obvious.
It's worth ruling out before looking for more complicated causes.
7. Your Hot Tub Cover Can Affect Water Loss Too
A damaged or poorly fitting cover doesn't technically mean your spa is leaking, but it can contribute to increased evaporation.
A good hot tub cover helps retain both heat and moisture.
If your cover is:
- Cracked
- Warped
- Damaged
- No longer sealing properly
you may notice that the spa requires topping up more frequently.
If there's no visible evidence of a plumbing leak, take a closer look at the condition and fit of your cover.
How Can You Tell If It's Actually a Leak?
One of the biggest clues is consistent, unexplained water loss.
You might notice that:
- You're topping up the spa much more frequently than before
- The water level drops even when nobody is using it
- There's moisture around the cabinet or equipment
- The ground around the spa stays wet
- Water repeatedly drops to a particular level
- You can hear or see water where it shouldn't be
At that point, it's probably time to investigate further.
Should You Use Hot Tub Leak-Sealing Products?
You'll find products designed to seal certain small spa leaks, but they aren't a universal solution.
A leak could be caused by a fitting, seal, pump component, plumbing connection or another issue that requires an actual repair.
Simply adding a sealing product without understanding the source can potentially delay diagnosing the real problem.
The better approach is to determine where the water is going and why.
Why You Shouldn't Ignore a Small Hot Tub Leak
It's tempting to simply keep topping up the spa.
But the leak itself isn't necessarily the only concern.
Water escaping into areas where it doesn't belong can potentially affect surrounding equipment, insulation and other components.
There's also the inconvenience and cost of constantly replacing and reheating lost water.
Finding and repairing a leak early is usually preferable to waiting until it becomes more significant.
When Should You Call a Hot Tub Technician?
If you've checked the obvious possibilities and still can't determine where the water is going, professional leak detection may be the next step.
You should also consider professional service if:
- Water loss is becoming significant
- The leak appears to be inside the cabinet
- Equipment or electrical components are involved
- You suspect its the plumbing behind insulation
- You're unsure how to safely access the affected area
- Previous repair attempts haven't solved the problem
Hot tub leaks can sometimes be straightforward.
Others require experience and systematic troubleshooting to locate.
Is Your Hot Tub Losing Water?
Don't spend the rest of the season constantly topping it up and wondering where the water is going.
If your hot tub is losing more water than normal, Mr. Spa can help identify the source and determine the appropriate repair.
Getting a small leak checked now can help prevent a much bigger headache later.
Contact Mr.Spa today for professional hot tub leak detection, service and repair.