Water Filters vs. Bypass Plugs—What’s the Difference?

Water Filters vs. Bypass Plugs—What’s the Difference?

Written for PRS Parts Inc. – Honolulu, HI

When it comes to refrigerator maintenance, many customers get confused between water filters and bypass plugs. At PRS Parts Inc., we often get asked, “Do I need a filter, or can I use a bypass plug instead?” The answer depends on how your fridge is set up and whether you’re using the water and ice features.

This article breaks down the key differences so you can make the right choice for your appliance—and your wallet.

🧊 What Is a Refrigerator Water Filter?

A water filter is a cartridge installed in your refrigerator’s water system. Its job is to:

  • Remove chlorine, lead, and other contaminants

  • Improve taste and smell

  • Protect the ice maker and water dispenser from buildup

If your refrigerator dispenses water or ice, you should be using a water filter—and changing it every 6 months or when the indicator light comes on.

🚫 What Is a Bypass Plug?

A bypass plug is a small plastic device that fits in place of a water filter. Its purpose is simple:
👉 It allows water to flow through the system without filtration.

Some fridges will not work properly unless either a filter or bypass plug is installed—even if you're not using water or ice.

🔍 When to Use Each One

Situation Use a Water Filter Use a Bypass Plug
You drink filtered water from the fridge ✅ Yes ❌ No
You use the ice maker ✅ Yes ❌ Not recommended
You don’t use water or ice features ❌ Not necessary ✅ Yes
You want to save money and don’t need filtration ❌ No ✅ Yes

If you're in Hawaii and using municipal water, filtration can be especially important for improving taste and removing chlorine.

💡 Pro Tip for Hawaii Residents

Because of Hawaii's naturally mineral-rich water, filters can clog more quickly. Always buy OEM (Original Equipment Manufacturer) filters or plugs to ensure:

  • Proper fit

  • Full water pressure

  • No leaks or error codes

PRS Parts Inc. stocks authentic water filters and bypass plugs for major brands like Whirlpool, GE, LG, Samsung, and Frigidaire—so you don’t have to wait weeks for online orders.

🛠 Final Advice

  • If you use the fridge’s water/ice → stick with a genuine water filter.

  • If you don’t → a bypass plug will save you money and keep your appliance running smoothly.

Not sure which you need? Bring your model number to PRS Parts Inc. at 540 Lagoon Dr. in Honolulu, and we’ll help you find the exact part.

📦 Stock Up Locally
Avoid online delays—we keep filters and bypass plugs in stock for same-day pickup.
Questions? Call us at 808-736-4080 or visit us today.

PRS Parts Inc. – Service with the Spirit of Aloha.

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