How To Fill A Hot Tub (Step-by-Step Guide)

In this post, we talk about the steps to fill a hot tub and provide some great tips for ensuring that your hot tub is filled with the right amount of water.

If you're thinking of buying a hot tub, you may be wondering what it takes to fill it up. It's a pretty simple process, but it can be a bit of a hassle to figure out how to do it right. So, if you're looking for a step-by-step guide that will help you fill your hot tub up to the right level of water, keep reading!

Fill Your Hot Tub in 9 Easy Steps

So your hot tub just arrived, and you're ready to fill it up. But before you get too excited, here are some things you need to do to ensure a smooth start for your hot tub.

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  1. Choose the best spot for your hot tub. Hot tubs are incredibly heavy after it's been filled with water. So choose the particular spot that's most enjoyable and comfortable for you. It should be firm, stable, and not too far from an electrical source. Most people like it outdoors because it offers a good view of nature.
  2. Check the plumbing lines. During transportation, these connections can come loose. Remove the front cabinet section panel and tighten the unions connecting the pipes to ensure no leaks. Leave it open while filling it up with water and observe any signs of leak like trickling sound or discoloration of the insulating foam.
  3. Attach a pre-filter to your garden hose. This removes suspended solids and solid metals from your water source.
  4. Remove the filter closest to the control panel and put the garden hose in with the pre-filter attached to it. Water flowing directly through this fitting will force any air out of the plumbing and prevent airlock. Keep this area free from anything that will clog the plumbing, like falling leaves or small insects.
  5. Turn the water on. Depending on the pressure, it usually takes around 15 to 30 minutes to fill the hot tub. Add a sequestering agent once the water level has filled the footwell. This removes the remaining suspended minerals that got through the pre-filter. Don't let the water reach the maximum level. Allow for some increase in the water level once people go in. About an inch or so below, the headrest works for most hot tubs.
  6. Turn off the water and put the filters back.
  7. Prime your hot tub. Modern hot tubs already have this feature built-in, so you don't have to worry about which features to turn on, its frequency and duration, etc. It'll tell you which button to press and just go from there.
  8. Observe the plumbing for any signs of leaking while the hot is being primed. Fixing leaks can be as simple as tightening the unions.
  9. Put the panel back. Once you've ensured your hot tub doesn't have any leaks, you can put the panel back on.
fill your hot tub in 9 easy steps

Before you go in, remember to do the rest, like checking your water chemistry and adding sanitizers. And don't forget to do daily or weekly maintenance to ensure your hot tub water is safe for everybody.


Making sure your hot tub works from the get-go goes a long way. Your hot tub will run smoothly without a hitch and give you years of fun and relaxation with friends and family. Remember to follow these steps whenever you need to refill after a complete drain and flush.