How to Increase Spa Jet Pressure?

jet spa

This tutorial will show you how to raise spa jet pressure and maintain your hot tub running properly if the jets in your hot tub or spa aren’t letting in enough water pressure. 

It’s aggravating to sit in your hot tub after a long day at work only to discover that the jets aren’t producing adequate water pressure to massage your aching muscles. 

If changing the pump’s speed doesn’t solve the problem, you might want to consider making a few more changes.

Most hot tubs, thankfully, include a variety of functions that allow you to raise the water pressure on a certain side or seat of the tub.

For example, if you have six jets that each demand 15 gpm of flow, you’ll want to keep the flow to the manifold at 90 gpm.

One of the finest things you can do is to remove and clean the spa jets at least twice, if not three times, a year. In general, the more you use your spa, the more you should consider cleaning it.

Removing the spa jet inserts from the hot tub and placing them in a bucket of white vinegar is the best way to clean them. All types of trash and dust can be removed from the spa jets using white vinegar.

This approach is not only good for cleaning spa jets, but it’s also effective for cleaning shower heads and faucets.

To filter, heat, and circulate the water, most hot tubs employ a typical plumbing system with a pump. Install a pressure gauge on the air valve and wait for the needle to stop moving completely. Finally, set the jets to their highest “on” setting.

How to Make Spa Jets Work Harder

Look for jets that are worn out or loose.

It’s also critical that you examine the jets closely and locate any that have become loose or need to be replaced due to wear and strain.

The good news is that non-stainless steel jet internals are readily available in a range of colors. If you’re concerned about the appearance of your hot tub, choosing spa jets that complement the design is a good option.

Remember that choosing the proper spa jets is a crucial step in determining the effectiveness of your hot tub. Most beginner hot tubs should have 14 jets and 1.5 HP jet pumps to go with them.

This is a good starting setup, depending on the water capacity, and it’s perfect for a tiny hot tub. Your spa would be nothing more than a giant bathtub without the hot tub jets.

Sitting in a bathtub full of hot water isn’t much joy until the jets are stroking your back. If you observe that the pressure in the jets has considerably decreased, there are several things you can do to improve the pressure.

First and foremost, you might want to turn off the waterfall. Most hot tubs include a waterfall control valve, so search for one on the side. You’ll notice an increase in the flow of water that goes through the jets almost immediately.

The air valves must then be opened. The water will flow with additional force as a result of this. Why, more crucially, should you allow the jets to run if you are in the hot tub but not all of the chairs are occupied?

Through the valves, you can manually close the jets that aren’t in use. This will assist focus the majority of the water pressure on the side of the hot tub that you’re using, and you’ll notice a boost in the price right away.


Scaling in your hot tub might occur if you don’t pay attention to the calcium content of your water or the pH levels of the water. Scaling is the buildup of calcium in pipes, reducing the amount of space available for water to flow freely.

The first thing you should do is test the water in your hot tub to see if the problem is caused by calcium. It’s most likely the case if the pH levels are greater.

You don’t have to give up hope, thankfully. Purchase a good quality descaler from your local store. Descalers can be added to the water to dissolve calcium deposits that have built up in your hot tub over time.

If the water you use to fill the hot tub is rich in magnesium or calcium, you might want to consider using a hose filter the next time you fill the tub.

The hose filter will reduce the amount of magnesium and calcium in the hot tub automatically, preventing such problems.

Examine for an Air Lock.

Another important issue that can lessen or entirely stop the pressure from your spa jets is the accumulation of air in your pipes.

An air lock can be a major issue, and you should attempt to resolve it as soon as possible. Bleeding the valves and pipelines, thankfully, is a rather successful technique of removing the air lock.

You can also activate and deactivate the jets for around 30 seconds, which may aid in the removal of the airlock. When air is expelled through the discharge pipe, a hissing sound is produced.

It’s not a tough procedure, but you can’t put it off any longer. Delaying the release of air from the pipes can lead to major difficulties in the long run.

Keep in mind that the interior pipes are designed to transport water, not air. These are just a few of the things you should be aware of when it comes to increasing spa jet pressure.

Apart from above, below are some quick guides and techniques which you can always refer to resolve this problem. There are a few tweaks you may make to improve the water pressure on a certain seat or side of your tub if you believe your Spa does not offer enough water pressure when you run the low speed of your Pump.

  1. Turn off the Waterfall Control Valve to close the Waterfall. The amount of water that comes out of your jets will increase as a result of this.
  1. Make sure your air valves are open. The water pouring from the jets will be given a boost by the air.
  1. Close the faces of any jets that will not be used throughout your massage session manually. This will focus all of the water pressure on the tub’s side and the jets you’ll be using.
  2. There are other things to consider, including head pressure and filterable area. Give it a shot. Remove the filter from the housing and test it, making sure the valves are fully open. If the pressure rises, the filter is the source of the problem. Changing the filter can somehow help in resolution of the issue


Overall, if anyone follows the above techniques, most of the issues related to jet pressure can be solved easily and one can expect an increase in the flow of water being supplied.

In summary, first, verify to make sure your filter isn’t clogged if your spa jets appear to be pulsing or halting. If your filter appears to be in good working order, check the water level in your hot tub. If there isn’t enough water in the system, air could be entering through the jets. 

If the problem remains after you’ve checked your filter and water level, you may have a clog in the line or your pump is just reaching the end of its lifespan and has to be serviced or replaced. Almost anyone can replace a pump if they have the proper instructions. 

Conducting thorough study and following each step of the installation instructions will ensure that your hot tub is safe to use, and you’ll save money over hiring a specialist to do the same job. Best of luck!