What is a Hot Tub Blower?

Hot tub blowers are also commonly referred to as air pumps or bubblers, as these names imply, a blower does just that, blows air into your hot tub water causing bubbling.

How does it work?

The blower is a unit that utilizes a fan to create air flow; it then forces the air through channels into the jets that allow for a release. The combination of air and water flow through the jets can provide a wonderful massage experience for the hot tub user.

What Do I Need to Know about a Blower?

If your spa does not currently use a blower and you are contemplating adding one, first of all you will want to make sure that your control pack will run a blower, it is a specific function that the control pack needs to be capable of operating. Also make sure you are ready to do the plumbing needed to connect in the air flow to your jets.

Also there are a few things to know that some people consider disadvantages of having a blower. The first is having the air injected into your water can cool down the water temperature and it does expend energy to have to keep reheating the water to maintain the higher temperature. Some people also find the blower running with the jets is too loud and interrupts there relaxation, but on the other hand many people count on the jets as their key to relaxation; so it all really comes down to personal preference.

If you already own a blower, they are a fairly simple piece of machinery that basically consists of a fan motor and housing. For this reason we recommend that if your unit goes out you replace the entire unit as it is much simpler and trying to just replace parts will offer little to no cost savings.

When looking for a new blower it is important to make sure you determine the correct voltage needed for your control unit, as they come in both 110V and 220V. Also, make sure your get the correct size to link up to your plumbing, usually 1.5” or 2”.

There are also different plug types available based on what type you need. Our Ultra and Max blowers include both a 4 FT Amp Cord and 4 Pin Plug. Our Silent Aire Blowers come with the option at checkout of a 3-pin Molded Plug, a 4-Pin Amp plug, a Gecko XM/XE 240 Volt Plug, or if you plan on hard-wiring and do not need a plug that is also an option.

How Can I Extend the Life of My Blower?

Premature blower failure is most often caused by water intrusion, there are a few ways to reduce the chance of water intrusion therefore extending the life of you spa blower. A Hartford loop in your plumbing that the use of a check valve will greatly decrease your chances of water intrusion, make sure that your installer/ technician uses both, it is also a recommendation that you replace your blower check valve anytime you replace your blower.
Spazazz RX Spa Aromotherapy


August 5, 2016

my hot tub blower is getting very hot and has caused the connection to distort. I have replaced the fitting. The blower blows well but I only get a few bubbles in the tub. Could this mean the blower is old or the check valve needs to be replaced? I have no idea what else it could be.

Ryan mather
November 23, 2016

Can I bloke my blower as it has a leak and I am losing water through it. I can’t fix ams someone built a deck around the spa

Kasey LaRose
June 20, 2016

Hi Ed,

If the hot tub doesn’t already have plumbing for a blower, then I’m afraid we won’t be much help on this one. Unfortunately, I’m unable to tell you how to plumb one in. If you would like to move forward adding the blower, it may be best to seek the advice of a local spa technician who can take a look at what you’ve got and give you a better idea of how to install it.

June 17, 2016

Hi I want to add a blower to my older tub it has the connection in the pack to install one my question is where do I plumb it in on the tub ..and I see a check valve is needed thanks in advance Ed

March 21, 2015

We have determined the voltage and pipe diameter for the new blower, but wonder whether the horsepower of the motor is of any concern.
Is there any advantage or disadvantage to motor size and its longevity and performance?
Thanks for your expert advice.
(I wish these mechanical parts were identified in a different way, rather than by a label that fades or falls off.)

April 13, 2015

Hi just replaced my blower on a spaform oslo hottub for a brand new one just one problem when I connect the blower and turn the tub on from the mains the blower remains on…….any ideas? …the only way to turn the blower off is either unplug it from its input into the master control panel or switch the hottub off from the main switch……….the blower button on the keypad dosnt seem to turn it on or off……please help

June 2, 2014


My blower has stopped working. The plug on my current blower is a four prong AMP plug with a green wire, white wire, empty prong, and black wire. With a voltmeter I measure voltage between the black wire and white wire of 120V. Since I have 120V going to the blower, I am thinking my blower is bad.

My current blower motor says 240V on the label. This has me confused? Do I need to replace the blower with a 240V motor, or is a 110V motor really the correct application?

Also, the outside diameter of my check valve that fits into the blower is 1 1/2 inches. I am not sure if I need a 1 1/2 inches blower or a 2 inches?

Thank you for your help,


June 3, 2014

Without being there I don’t really have a way to confirm what the voltage is on the blower you currently have. It isn’t likely that the blower would be labeled incorrectly but it is possible.

The plumbing size would need to fit the diameter of the pipe the blower attaches to. If you purchased a 2" blower and you really needed an 1 1/2" you could simply put a reducer bushing on the plumbing to attach it to the pipe. It would definitely be easier to determine the pipe diameter and purchase a unit with the correct plumbing to begin with. If your check valve is 1 1/2" then your plumbing is most likely the same.

Please let us know if you have any other questions.

May 21, 2014

That’s a hard one to diagnose from a distance. If you aren’t getting any air bubbles when the blower turns on then I would assume that either the check valve is stuck closed or that there is something wrong with the blower. It isn’t likely that anything would be blocking the air lines. I wish I could diagnose the problem further but without being there to look at it the system it is hard to do. Good Luck, please let us know if you have any other questions!

May 18, 2014

I have an old pdc spa. I just spent a lot of time and money trying to get it up and running. It was originally supposed to be free standing with a skirt around it. Then the previous owners built a deck around it. Now access is a nightmare. Anyway. My problem is that I have replaced the blower. It starts up. Sounds great. Was connected the same way as the previous blower. However, there is no sign of the air bubbles actually gettng into the spa. I have no idea what else to check. The blower is working fine. It has a check valve (installed correctly) attached to a 2 inch hose that goes up into the body of the spa. I don’t see any other tubes or valves near there other than the air valves from my jets that runs along the top of the spas inside. Any ideas? I’m at a loss. Thanks so much

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