If you live in Houston, you already know the tap water struggle is real. Between the hardness, chlorine taste, and unpredictable water quality events (especially after storms), many homeowners turn to reverse osmosis drinking water systems for cleaner, better-tasting water.

But even the best RO system depends on one thing: regular reverse osmosis replacement filters.

Your filters do the heavy lifting—removing contaminants, improving taste, and protecting the membrane so the system can continue to deliver crisp, purified water. The biggest mistake homeowners make?

They forget to replace their filters on time, which can reduce water quality and slow the system down.

And if you have a Dupure system, there’s something even more important to know:

Dupure’s reverse osmosis replacement filters are proprietary. They are designed specifically for Dupure systems and are not interchangeable with generic filters sold online or in big-box stores.

You can only get them directly from us — which ensures you receive the right filters for your exact system.

How Reverse Osmosis Works (Without Getting Too Technical)

Think of it as a multi-stage water cleanup line:

1. Pre-filter
   Removes chlorine, dirt, and particulates so they never reach the membrane.

2. RO Membrane
   This is where the magic happens — it removes dissolved solids, contaminants, and microscopic impurities.

3. Post-filter
   Polishes and improves taste just before the water reaches your faucet.

Each filter has a lifespan, and replacing them on time protects your system and keeps your water tasting fresh.

How Often Should You Replace Reverse Osmosis Filters?

To keep your system performing like it did on day one:

If your RO water starts to taste flat, flow slows down, or your filters look discolored—it's time.

The Houston Factor: Why Filters Matter More Here

Houston’s water challenges make timely filter replacement even more important:

• Chlorine and chloramines can damage RO membranes

• Hard water buildup makes filters work harder

• Water quality varies dramatically depending on storms, main breaks, and infrastructure events

Your reverse osmosis replacement filters are your system’s first line of defense.

Why You Should Only Use Dupure Filters

Here’s what most people don’t know:

RO filters are NOT universal.

Big-box stores sell "one size fits all" filters — but they don’t fit Dupure systems and can:

• Reduce system performance

• Cause leaks

• Void your warranty

• Damage the RO membrane

Dupure’s filters are manufactured to fit our systems exactly, and they are not available anywhere else.

When you order from us, you get:

• The correct filter every time

• Pre- and post-filters designed to maintain membrane lifespan

• Fresh inventory (not old filters sitting in a warehouse)

• Annual Sales

You can even set up recurring delivery, so your filters arrive right when you need them—no guesswork.

Signs Your RO Filters Need Replacing

If you’re experiencing any of these, it's time to order new reverse osmosis replacement filters:

• Water tastes flat, metallic, or chlorinated

• Flow from the RO faucet is slower than normal

• Your system is making noise more often than usual

• It’s been 6–12 months since your last replacement

And if you can’t remember the last time you changed them...
It’s definitely time.

How to Order Reverse Osmosis Replacement Filters in Houston

Easy.

1. Visit our online replacement filter store

2. Take our Find My Filter Quiz

3. Order filters made exclusively for Dupure systems

Most homeowners check out in 2 minutes.

✔ No guessing
✔ No wrong filter sizes
✔ No “universal” filters that don’t fit

Your filter kit arrives at your door, ready to install.

Want Dupure to Handle It for You?

We get it — the whole “when did I last replace these?” thing isn’t for everyone.

Dupure offers:

• Filter subscription delivery
• Hands-off annual maintenance options

Just set it up and forget it.

Ready to replace your filters?

Order your Dupure reverse osmosis replacement filters now — direct from the source.
Because great water starts with the right filters.