Not sure if your water filter works with your Zip™ HydroTap? You're not alone. With different generations, part numbers, and head fittings, figuring out compatibility can feel like solving a puzzle with a missing piece. But don’t worry—we’ve got your back. This guide breaks it all down in plain English. Whether you’re replacing an old filter or switching to a more affordable alternative, this page will help you get it right the first time.
Understanding Zip™ Water Filter Compatibility
Compatibility means that the filter you’re using is designed to fit and function correctly with your Zip™ HydroTap system. This includes having the correct physical dimensions, filtration capacity, connection type, and certifications. A compatible filter will perform to expected standards without leaks, clogs, or poor water quality. It should slot in without resistance and deliver clean, safe, and great-tasting water—just like the original.
What Does “Zip-Compatible” Actually Mean?
“Zip-compatible” refers to water filters that are designed to fit and function in Zip™ systems—even if they aren’t made by Zip™. These filters often mimic the size, fitting, and filtration capabilities of genuine Zip™ filters. But not all are created equal. Some match only in shape, while others also meet strict performance and safety standards. Compatibility goes beyond shape—it’s about reliability, safety, and certification too.
Why Compatibility Matters for Performance & Safety
Using the wrong filter isn’t just annoying—it can be unsafe. An incompatible filter may not seal properly, causing leaks. It might not remove contaminants as effectively, which could affect the taste, odour, and quality of your water. Worse, if it doesn’t meet WaterMark or NSF certifications, it may not filter harmful substances like chlorine, lead, or microplastics. Choosing the right filter helps keep your water clean and your system running smoothly.
How to Identify Your Zip™ System
Before shopping for a filter, you need to know what Zip™ system you have. This is the key to finding the right fit. Here’s how to identify your setup.
Step 1: Locate the Model Number
Open your Zip™ HydroTap cupboard and look for a sticker on the unit. It typically shows the model number, serial number, and power rating. The model number might look like “HT1703,” “G4 BCS,” or similar. Write it down or take a photo—it’ll come in handy when choosing a filter.
Step 2: Identify the Generation of Your Unit (G3, G4, G5)
Zip™ systems have evolved over time. Knowing the generation helps match filters correctly:
- G3: Older systems that use filter 91240.
- G4: Mid-generation models using 91290 filters.
- G5: Latest generation with advanced filtration, using 93701 or 93702 filters.
If your unit is touch-controlled and looks modern, chances are it’s G4 or G5. Still unsure? A quick Google search of the model number will usually point you in the right direction.
Step 3: Check the Filter Head Type & Fitting
Remove your current filter (follow your unit’s safety guide first) and look at the filter head—the part that connects to the system. Some filters have twist-lock connectors, while others push into place. The size, shape, and locking mechanism need to match your replacement filter. If it doesn’t click or lock in smoothly, it’s probably not compatible.
Visual Guide: Common Zip™ Filter Models
Here’s a cheat sheet to help you visually match your filter:
- 91240: Short, chunky shape—common in G3 units.
- 91290: Slimmer, longer—used in G4 HydroTap systems.
- 93701 / 93702: Sleek, high-capacity filters for G5 models.
If you're still stuck, upload a photo to an online Zip™ group or contact your supplier—they often recognise models on sight.
Common Zip™ Filter Models and Their Compatible Replacements
Let’s look at the most widely used Zip™ filter models and what compatible options are available.
Zip™ 91240 – Classic Models (G3)
This is one of the original Zip™ filters. It’s designed for older G3 units and has a 0.2 micron rating. Several compatible filters mimic this size and filtration capability. When buying replacements, check that they meet WaterMark certification and match the twist-lock fitting.
Zip™ 91290 – Generation 4 HydroTap
Used in G4 systems, the 91290 is a triple-action filter that removes sediment, chlorine, and odours. Compatible options are widely available and typically offer 0.5 micron filtration. Watch out for lower-grade versions that might only meet basic filtration. The filter should click securely into place and match the listed flow rate and capacity.
Zip™ 93701 / 93702 – Generation 5 (G5) Systems
These filters are high-capacity and suitable for the newer G5 HydroTaps. While compatible filters are harder to find, they’re becoming more available in Australia. Make sure they include the correct sub-micron filtration and have a long service life of at least 4,000 litres.
How to Match Third-Party Filters to These Models
Start by matching the part number (91240, 91290, etc.). Then check the size, shape, and filter head connection. Look for filters that mention “compatible with Zip™” and display clear specs: micron rating, flow rate, WaterMark approval. If all these align, chances are the filter will work in your system.
How to Verify Filter Compatibility Before Buying
Don’t rely on a vague “compatible with most systems” label. Here’s how to double-check before clicking ‘buy’.
Look for the WaterMark Certification
This Australian certification proves the filter meets national plumbing safety and quality standards. If a filter doesn’t have the WaterMark symbol, skip it. It’s a sign it might not filter water properly—or worse, damage your system.
Check Micron Rating & Filtration Technology
The micron rating tells you how fine the filter is. Zip™ filters are usually 0.2 to 0.5 microns, which remove bacteria, microplastics, chlorine, and dirt. Look for filters with “sub-micron” or “multi-stage” filtration. Avoid anything above 1 micron—it won’t catch finer contaminants.
Cross-Reference Dimensions & Connector Type
Even a small mismatch in size or shape can cause issues. Always compare the length, diameter, and fitting type to your original filter. If you’re unsure, ask the supplier for a spec sheet or diagram.
Read Customer Reviews & Technical Specs
Check what other users say, especially if they mention your Zip™ model by name. Good reviews will mention installation ease, taste improvement, and system fit. Be wary of vague or overly positive reviews that sound like they were written by a robot.
Genuine vs Compatible Filters: What’s the Difference?
This is where opinions fly fast and loose—so let’s stick to the facts.
Pros & Cons of Using OEM Filters
Original filters from Zip™ are tested, certified, and guaranteed to work. You’ll often pay more for them—sometimes double the price of compatible filters. But you’re getting what the manufacturer intended. That said, OEM filters still need replacing every 6–12 months, just like the rest.
Are Compatible Filters Safe to Use?
If they’re certified and physically compatible—yes. Plenty of Australian suppliers sell compatible filters that meet WaterMark and NSF standards. They’re cheaper and still effective. But cheap knockoffs that lack certification can be risky, leading to leaks, poor filtration, or even damage to your system.
When Is It Worth Paying More for Genuine Filters?
If your Zip™ system is still under warranty or you’ve had issues with compatible filters in the past, go genuine. It gives peace of mind, especially in high-use settings like offices or cafes. But for most home users, a certified compatible filter does the trick just fine.
How Often Should You Replace Zip-Compatible Filters?
Most filters should be replaced every 6–12 months, depending on usage and water quality. But here’s a breakdown by model and use case.
Recommended Lifespan by Model
- 91240: Replace every 6–9 months or 3,000 litres.
- 91290: Replace every 6–12 months or 4,000 litres.
- 93701/93702: Replace every 12 months or up to 6,000 litres.
Signs It’s Time to Replace Your Filter
Common signs include reduced water flow, unusual taste, or your system alerting you with a red light. If the water smells off or tastes metallic, swap the filter—even if it’s earlier than scheduled.
How Filter Age Affects Water Quality
Old filters don’t just stop working—they can trap bacteria and reduce flow. That’s like driving a car with an oil filter full of sludge. You wouldn’t drink from a dirty glass—so don’t run your water through a clogged filter either.
Installation Tips for Zip-Compatible Water Filters
Good news: you don’t need a plumber to change most filters. It’s a DIY job—like changing a lightbulb, but with water.
How to Replace Your Filter in 5 Simple Steps
- Turn off the water supply.
- Open the unit cupboard and twist the filter counter-clockwise to remove it.
- Align the new filter, insert, and twist clockwise until secure.
- Turn the water back on and run the tap for 30 seconds to flush.
- Check for leaks and reset the filter alert if needed.
Do You Need a Technician or Can You DIY?
Unless your system is acting up, you can absolutely DIY this. Just make sure to use clean hands and don’t overtighten the filter—it should sit snug, not jammed in like a jar lid after leg day.
How to Reset Filter Change Alerts (If Applicable)
Many Zip™ systems have a light or screen indicator. After installing a new filter, hold down the reset button (often inside the cupboard or on the tap) for 5–10 seconds. Check your model’s manual if you get stuck—every system is a little different.
Frequently Asked Questions
Still scratching your head? These quick Q&As might help.
Can I Use a Filter Without WaterMark Certification?
You can, but you probably shouldn’t. Filters without certification may not remove contaminants properly and could affect your warranty or insurance if there’s a failure.
Will a Compatible Filter Void My Warranty?
Possibly. Zip™ may not cover damage caused by non-genuine filters. If your system is still under warranty, check the fine print—or play it safe with OEM parts.
Are CO₂ Cylinders Also Zip-Compatible?
Some are, but not all. Always check that the CO₂ cylinder is the correct size and connection type. At EcoVenza, we offer CO₂ cylinders compatible with Zip™, Billi™, and more—plus we pick them up for recycling when they’re empty.
Where Can I Buy Reliable Compatible Filters in Australia?
Look for suppliers with WaterMark-certified filters and clear specifications. EcoVenza, AquaPurePlus, and Water Filtration Systems Australia are good starting points. Avoid unbranded filters from generic marketplaces without specs or support.
Summary: Making the Right Choice for Your Water System
Getting the right filter isn’t rocket science, but it does take a little know-how. Identify your model, check your part number, and look for filters that meet Australian standards. Don’t fall for cheap imitations that might leave you with bad-tasting water—or worse, a leak under the sink. Whether you stick with genuine filters or try a certified compatible, the goal is the same: fresh, clean water, every time you turn on the tap.
Checklist for Checking Compatibility
- Know your model number
- Identify your Zip™ generation (G3, G4, or G5)
- Match the filter part number
- Verify the filter is WaterMark certified
- Double-check the fitting and dimensions
Choosing the Best Filter for Your Needs
There’s no one-size-fits-all answer. If you’re budget-conscious but still want safe, clean water—go for a certified compatible filter. If your Zip™ is under warranty or you want guaranteed performance, stick with genuine. Either way, now you’ve got the tools to make a smart decision—without needing a PhD in plumbing.