How to Fix a Hot Tub With Weak Jets

Hot tubs are a fantastic way to relax, but what happens when the jets lose their power and fail to provide the soothing massage you’re accustomed to? Weak jets can be frustrating, especially when you expect that invigorating flow of water that helps you unwind. The good news is that many of the causes of weak jets are easy to fix with a bit of troubleshooting and maintenance. In this post, we’ll walk you through the steps to fix weak jets and restore your hot tub to its full power.

Why Hot Tub Jets May Lose Power

Weak jets are a common issue, but understanding why they lose power is the first step in fixing them. Several factors can cause jets to underperform, and each of these issues can be resolved with proper maintenance or minor repairs.

Airlock: Airlocks occur when air gets trapped in the plumbing, preventing water from flowing through the jets at the right pressure.
Clogged Filters: When the filters are dirty or clogged, they reduce water flow, which directly impacts the jet pressure.
Pump Problems: The pump circulates water through the system, and if it’s not working efficiently, the jets will suffer from weak pressure.
Leaks in the Plumbing: Leaks or cracks in the hot tub’s pipes can cause a drop in water pressure, which will make the jets weaker.
Low Water Level: If the water level is too low, the jets will not have enough pressure to function properly.

Step-by-Step Guide to Fixing Weak Jets

Before you start fixing the jets, it’s important to troubleshoot the issue properly. Here’s a step-by-step guide to help you identify and fix weak hot tub jets.

1. Check the Water Level

A very common and simple cause of weak jets is a low water level.

Check the Water: Make sure the water level is above the skimmer intake or at the manufacturer’s recommended level.
Refill the Hot Tub: If the water level is low, add water to the hot tub. Keep the power off while you do this.

2. Inspect and Clean the Filters

Dirty or clogged filters are a leading cause of weak jets.

Turn Off the Power: Before cleaning the filters, make sure to turn off the hot tub’s power to avoid any electrical issues.
Remove and Inspect the Filters: Take the filters out and inspect them for debris, dirt, or other obstructions.
Clean the Filters: Clean the filters with a hose or a filter-cleaning solution. For heavily clogged filters, it may be best to replace them.
Reinstall the Filters: After cleaning or replacing, reinstall the filters and turn the power back on to test the jet pressure.

3. Check for Airlocks in the Plumbing

Airlocks in the plumbing can prevent water from flowing through the jets effectively.

Signs of an Airlock: If you hear gurgling noises or notice that the jets are working intermittently, it’s likely due to an airlock.
How to Remove Airlocks: To clear an airlock, run the hot tub’s pump for several minutes. You may also loosen the union fittings on the pump or other parts of the plumbing system to help release the air.

4. Inspect the Pump

The pump is the heart of your hot tub’s water circulation system. A faulty pump will result in weak jets.

Check for Leaks or Damage: Inspect the pump for any visible leaks or signs of damage, such as cracks or excessive wear.
Ensure the Pump Is Running: Make sure the pump is running and circulating water properly. If the pump isn’t running, the issue could be a broken motor or a power supply issue.
Clean the Pump: Over time, debris and particles can clog the pump’s impeller. Remove the debris carefully to restore full functionality.

5. Look for Leaks in the Plumbing

Leaks in the plumbing system can cause weak jets by allowing water to escape before reaching the jets.

Inspect for Leaks: Check the plumbing lines for visible leaks. Look around the pipes and joints for signs of water leakage.
Seal Leaks: If you find any leaks, seal them with appropriate plumbing tape or sealant. If the damage is more severe, you may need to replace the affected pipe or fitting.

6. Examine Jet Valves for Issues

Your hot tub’s jet valves control the water flow to each jet. These valves can become clogged, stuck, or even broken.

Check the Jet Valves: Make sure all the jet valves are open and functioning correctly. Sometimes, valves can become stuck or clogged with debris.
Clean the Jet Faces: Remove and clean the jet faces. Mineral deposits, hair, or debris can clog the jets and reduce the water pressure.

7. Replace Worn-out Components

If your hot tub is old, the components such as the pump, jets, or plumbing may need to be replaced.

Pump Replacement: If the pump is failing or old, replacing it with a new, more powerful pump can restore jet pressure.
Jet Replacement: If the jets themselves are damaged or worn out, consider replacing them with newer models that offer better performance.

Preventative Maintenance to Keep Jets in Top Shape

Preventing weak jets in the future involves performing regular maintenance and monitoring your hot tub’s components. Here’s how to keep your jets strong and functioning properly:

Clean the Filters Regularly: Clean your filters every month to ensure they remain free of dirt and debris, ensuring optimal water flow.
Check Water Chemistry: Proper water chemistry helps prevent scale buildup and clogging of your jets. Regularly test and balance the pH, alkalinity, and sanitizer levels in your hot tub.
Run Your Jets Weekly: Even if you’re not using the hot tub, run the jets once a week to help circulate the water and clear out any airlocks or buildup.
Inspect and Maintain the Pump: Regularly check the pump to ensure it’s in good working condition. Clean the pump’s impeller and inspect for leaks or damage.
Use a Cover: Protect your hot tub with a cover to keep debris, dirt, and leaves out of the system. A cover also helps reduce the amount of water evaporation.
Winterize Your Hot Tub: In colder climates, winterizing your hot tub is essential to prevent freezing pipes that can damage the system.