Aquarius Water Conditioning Blog

How to Change a Whole House Prefilter

You may be thinking, “what is a prefilter, anyway?” We’re glad you asked! A prefilter is a filter that all water runs through before entering your home’s softening and drinking water filtration systems. The idea is that by prefiltering, you’ll be able to reduce cloudiness and water staining by first stripping the water of sand and sediment. (For more information on prefilters, and to figure out if you need one for your home, check out our recent blog post!)

Water Filters | Water Prefilter | Water Conditioning | Water Softening

How do I determine that my prefilter should be changed?

Make changing your prefilter a habit, one that you remember to do once every three-to-six months, depending on your water’s properties. Your water conditioning expert (hey, that’s us!) should be able to recommend the best time frame for your system’s individual needs. Keep in mind that a sudden decrease in water pressure can indicate that your filter may be clogged and in need of assistance.

What steps should I take to change my prefilter?

  1. Turn off the water on both the inlet and outlet sides of the filter, and relieve pent up pressure via the pressure release button — which is usually red.
  2. Unscrew the filter housing by twisting and pulling down. You may need to use a prefilter wrench to loosen it up a bit, but be sure not to lose the o-ring positioned on the inner lip of the canister. If you do lose it, or if it looks like it needs replacing, take a trip to your local hardware store or call your water conditioning company.
  3. Pull out the old filter and wipe out the inside of the canister carefully. You may choose to use a small amount of bleach or rust-remover to really get it clean. Just make sure you rinse it thoroughly before putting it back together.
  4. Place your new filter in the canister and screw it back onto the fixture, taking care not to tighten it too much. Finally, turn the inlet and outlet switches back to the on position, and inspect for leaks.

The best way to know for sure if your prefilter has been changed correctly is by requesting a maintenance visit from your local water treatment experts — that’s us!

At Aquarius Water Conditioning, our technicians are ready and willing to provide you with a complimentary water analysis and explain each option you have to help bring the softest, most pure water into your home day in and day out. For more information call 888-741-9025.

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