If you own a Zip HydroTap, and your location is in a hard water area, choosing the correct filter kit (and periodically replacing its cartridge) is essential for maintaining water quality, protecting your system from limescale and ensuring optimum performance.
The good news is it's simple – your HydroTap will usually require one of just three filter kits.
Quick Filter Kit Guide
| Filter Kit | Suitable HydroTap Models | Recommended Capacity | Replacement Cartridge |
|---|---|---|---|
| 95591 | All Zip HydroTap for Home models | Up to 10 people | 95601 |
| 95592 | Commercial 100/75 & 140/75 HydroTaps | Approx. 20–40 people | 95602 |
| 95593 | Commercial 160/175 & 240/175 HydroTaps | 60+ people | 95603 |
Domestic HydroTap Filters
If you have a Zip HydroTap for Home, including models such as:
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Celsius Plus
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Arc Plus
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Cube Plus
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Classic Plus
you'll need:
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95591 – First-time limescale filter kit then your replacement cartirdge for this is:
This kit is designed for residential properties and households with typical daily usage.
Commercial HydroTap Filters
Commercial HydroTaps require a larger capacity limescale filtration system depending on the size of the command centre.
100/75 & 140/75 Models
Ideal for workplaces with approximately 20–40 users.
Use:
160/175 & 240/175 Models
Designed for larger offices, schools, healthcare, hospitality and busy workplaces with 60+ users.
Use:
Why Replace Your HydroTap Filter?
Replacing your HydroTap filter regularly helps to:
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Improve the taste and quality of drinking water
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Reduce limescale build-up
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Protect your HydroTap command centre
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Maintain optimum boiling, chilled and sparkling water performance
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Extend the lifespan of your system
How Often Should I Replace My HydroTap Filter Kit filter Cartridge?
For Zip HydroTap external limescale filter kits (95591, 95592 and 95593), the replacement interval depends on both time and water usage.
General recommendation
- Domestic (95591): Replace the external cartridge (95601) every 12 months, or sooner if the filter reaches its rated capacity.
- Commercial (95592 & 95593): Replace the external cartridge (95602 or 95603) every 6 months as part of a planned maintenance schedule, or sooner if the water usage exceeds the filter's capacity.
By filter kit
| Filter Kit | Replacement Cartridge | Typical Change Interval |
|---|---|---|
| 95591 (Home) | 95601 | Every 12 months |
| 95592 (100/75 & 140/75) | 95602 | Every 6 months |
| 95593 (160/175 & 240) | 95603 | Every 6 months |
Why commercial filters are changed more often
Commercial HydroTaps typically serve far more people, so although the limescale filters are larger, they are designed around higher throughput. Zip's commercial guidance bases the filter sizing on expected daily litres and user numbers and recommends six-monthly replacement as part of HydroCare Plus to maintain limescale protection.
- ✅ HydroTap for Home: Replace the external limescale cartridge every year.
- ✅ HydroTap for Work (commercial): Replace the external limescale cartridge every 6 months.
- ⚠️ Replace earlier if the filter reaches its litre capacity or the HydroTap has exceptionally heavy use.
Not Sure Which Filter You Need?
If you're unsure which Zip HydroTap model you have, simply contact The Tap Specialist with your model number or send us a photo of your HydroTap. Our team will identify the correct filter and help you order the right replacement.
Need a new filter today? Browse our full range of genuine Zip HydroTap replacement filters or get in touch for expert advice.
Here's a customer-friendly explanation that works well for a Shopify product page or blog post.
What's the Difference Between the Internal and External HydroTap Filters?
Many Zip HydroTap owners are surprised to learn that their system may have two different filters, each with a different job.
Internal HydroTap Filter
The internal HydroTap filter is the primary water filter fitted inside every Zip HydroTap. It is supplied with every new HydroTap system and removes impurities to deliver clean, great-tasting filtered water.
Over time, the filter will become exhausted, and your HydroTap will automatically display a filter replacement alert when it's time to fit a new one. Replacing the internal filter promptly helps maintain water quality, protects your HydroTap and ensures it continues to perform at its best.
Its job is to improve the quality and taste of your drinking water by removing:
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Chlorine taste and odours
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Sediment and fine particles
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Some bacteria and cysts (depending on the filter type)
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Other impurities that affect water quality
This filter ensures you enjoy clean, fresh-tasting boiling, chilled and sparkling water.
Typical replacement filters
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93701 – Most current Zip HydroTap for Home models
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93702 – Many current commercial Zip HydroTap for Work models
Good to know: Your HydroTap monitors this filter and will display a "Replace Filter" message when it's due for replacement.
External Limescale Filter Kit
The external filter kit is an additional filter installed on the incoming water supply before it reaches the HydroTap.
Its purpose is completely different.
Instead of improving taste, it protects the appliance by reducing limescale in hard water areas.
This helps to:
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Protect the boiling system from limescale build-up
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Maintain energy efficiency
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Reduce the likelihood of breakdowns
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Extend the lifespan of your HydroTap
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Help maintain manufacturer warranty requirements where applicable
Do I Need Both An Internal Filter & An External Filter Kit for My Hydrotap?
If you live in a hard water area (such as London, much of the South East, East Anglia and many other UK regions), then yes. Check our hard water postcode checker here.
The two filters perform completely different jobs:
| Internal Filter | External Limescale Filter |
|---|---|
| Improves drinking water quality | Protects the HydroTap from limescale |
| Fitted as standard | Optional, but strongly recommended in hard water areas |
| Removes chlorine, sediment and impurities | Reduces limescale before water enters the appliance |
| HydroTap reminds you when to replace it | No reminder – replacement must be scheduled manually |
Which Filter Do I Need?
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Need better tasting water? Replace the internal HydroTap filter.
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Need to protect your HydroTap from limescale? Install or replace the external limescale filter kit.
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Live in a hard water area? You should have both fitted for the best performance and protection.
Top tip: Your Zip HydroTap only reminds you to replace the internal filter. It does not notify you when the external limescale filter cartridge needs replacing, so make sure you replace it at the recommended interval to keep your HydroTap protected.