Top Tip for Installing an Air Blower on Your DIY Hot Tub

installing and air blower

In this video from, Andi shares a valuable tip for anyone installing an air blower on their DIY hot tub. Rob, who has built his own hot tub in France, encountered an issue during his installation, which Andi will explain further. So let’s dive in and explore this top tip that will ensure a successful air blower installation on your DIY hot tub.

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The Importance of Check Valves:

Check valves are typically used to prevent water from entering the air blower, as water and electricity do not mix well. If water enters the blower, it can trip the breaker or cause damage. However, there’s a possibility of water bypassing the check valve if your air blower is located below the waterline and subjected to the water pressure in your DIY hot tub.

Introducing the Hartford Loops:

To address this issue, Andi suggests using gravity as a protective measure for the air blower instead of solely relying on check valves. Rob’s solution involved incorporating Hartford Loops, which elevate the airline above the waterline. By utilizing gravity, water cannot pass over the Hartford loop and reach the check valve. It’s a simple and effective way to safeguard the air blower.

Preventing Water Damage:

Mixing of water and air lines can occur when the pumps are turned off, which is why Hartford Loops are essential. They prevent water from flowing into the air blower and causing damage. Neglecting to include these loops can lead to the gradual draining of the hot tub through the blower, resulting in rusting or frequent tripping of the breaker.

Importance of Following Plans:

Andi emphasizes the significance of following the plans when building a DIY hot tub. Properly designed plans, which can be found at, detail the inclusion of Hartford Loops to keep water out of the air blower. It’s crucial to avoid damaging the blower and ensure the longevity of your hot tub.


Installing an air blower on your DIY hot tub requires careful consideration to protect the blower from water damage. By incorporating Hartford Loops and utilizing gravity, you can effectively prevent water from entering the air blower and causing potential issues. Following detailed plans and including the recommended features ensures a successful and enjoyable hot tub experience. If you have any questions or need further assistance with your DIY hot tub project, reach out to Andi for expert guidance. Stay tuned for more informative videos and helpful tips from

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Thanks - Andi


Hi, Andi here. I own and also write all of the articles and info pages on the site. Some years back now, I built my own hot tub but struggled to find the information I needed. So, once my tub was complete, I started this website to help others in their own pursuit of hot tub and plunge pools DIY building information.

Today, I've helped over 900 DIY customers just like you all over the world build hot tubs and pools. Have a good look around the site, there are lots of resources here. Please do get in touch if I can help you. - Cheers, Andi

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