If you’re a hot tub owner, you already know how relaxing a good soak can be—especially after a long day. But what happens when your spa’s outer shell starts to look a little… grimey? 🧼 Whether it’s from dirt, mildew, or the elements, the buildup on your hot tub’s exterior can be an eyesore. So the natural question is:
Can you pressure wash a hot tub or spa exterior?
✅ Yes—but with caution. Pressure washing can be an efficient way to clean the outside of your spa, but only if done properly and safely.
Let’s dive into what parts are safe to wash, what pressure settings to use, and the best practices for keeping your spa looking clean and inviting. 💧✨
🛁 What Can Be Pressure Washed on a Hot Tub?
The exterior panels of most modern hot tubs and spas are made from durable synthetic materials like plastic composites or vinyl. These surfaces are typically designed to withstand the elements, and they’re generally safe for light to moderate pressure washing.
You can also use a pressure washer to clean:
- The spa cover (if it’s vinyl or marine-grade plastic)
- The surrounding deck or pavers
- Steps and rails made of composite or weather-resistant wood
🚫 However, never pressure wash the spa interior or any electrical components, and be careful not to spray water into vent openings, control panels, or connection ports.
🔧 Best Pressure Washing Settings for Spa Exteriors
A hot tub’s outer shell may be sturdy, but it’s not built to take industrial-level force. Use the wrong settings, and you might crack the paneling or cause leaks.
Here’s what to aim for:
- PSI Range: 1,000–1,500 PSI (never exceed 2,000 PSI)
- Nozzle Tip: Use a 25° or 40° spray tip for wider coverage and reduced force
- Spray Distance: Maintain at least 12–18 inches of space between the nozzle and surface
🔄 Always test on a small, inconspicuous spot first before spraying the entire tub.
🧼 Cleaning Solution Tips
Hot tubs are close to where people relax—sometimes with skin exposed—so you want to use non-toxic, spa-safe cleaners.
Recommended options:
- Mild dish soap or castile soap
- Biodegradable, chlorine-free cleaners
- Simple Green or similar non-toxic degreasers
Avoid these:
- Bleach ❌
- Harsh degreasers ❌
- Solvent-based cleaners ❌
💡 Pro Tip: Let the detergent sit for 5 minutes before rinsing. This helps loosen stubborn grime or mildew without extra pressure.
🚿 Step-by-Step: How to Pressure Wash a Hot Tub Exterior
Step 1: Power Down and Unplug
Make sure the hot tub is completely powered off and disconnected from its power source before beginning. Water and electricity do not mix. ⚡💦
Step 2: Remove Accessories
Take off any covers, steps, or decorative pieces. Clean those separately with a soft wash or low pressure.
Step 3: Rinse the Area
Give the surface a quick rinse to remove loose debris like dust, leaves, and spiderwebs.
Step 4: Apply Cleaner
Spray your biodegradable cleaner across the surface, focusing on grimy spots. Let it sit for a few minutes.
Step 5: Pressure Wash Gently
Using your 25° or 40° tip, spray in sweeping horizontal motions. Keep the nozzle moving and maintain your distance to avoid etching or cracking the panels.
Step 6: Rinse Thoroughly
Once the dirt is gone, do a full rinse to remove all soap residue.
Step 7: Dry and Inspect
Use a soft towel or microfiber cloth to dry any remaining water. Inspect for cracks, peeling, or loose panels.
⚠️ Safety and Damage Prevention
Here’s what NOT to do when pressure washing your hot tub:
- 🚫 Don’t spray directly into vents, intakes, or control panels
- 🚫 Don’t use a turbo or zero-degree nozzle (these are too aggressive)
- 🚫 Don’t try to clean while the hot tub is still plugged in
- 🚫 Don’t wash the inside of the tub with a pressure washer
If the interior needs a deep clean, use spa-specific cleaning solutions and a non-abrasive sponge or cloth instead. The inside surface is more delicate and not designed for high-pressure water.
🧽 What About the Spa Cover?
Spa covers collect just as much gunk as the tub’s exterior. If it’s vinyl or plastic-coated:
- Use low pressure (under 1,000 PSI)
- Spray from at least 18 inches away
- Avoid prolonged soaking or pooling water
Be sure to air-dry the cover completely before putting it back on to prevent mold growth.
🌟 Final Thoughts
So, can you pressure wash a hot tub or spa exterior?
✅ Yes—if you follow the rules. With a little care and the right tools, you can keep your spa looking as fresh as the day it was installed.
Do it right and you’ll enjoy:
- A clean, inviting spa space 💦
- Less mold, mildew, and grime 🧼
- Longer lifespan for your hot tub 🛁
- Less manual scrubbing every season 🙌
Keep it clean, keep it safe, and soak stress-free.
