Learning Centre

How to Choose an Instant Water Tap - Top Brands Compared (Zip, Billi & More)

Posted on April 28, 2026 | Author: Oakleigh Kingon

Overview

If you're comparing Billi and Zip instant water taps, you're already looking at the two most established brands in the Australian market. Both have been manufacturing boiling, chilled and sparkling water taps for decades, and both have built strong reputations for quality. So what actually separates them?

This article covers the questions we get asked most often, so you can make a confident decision.

What they have in common

Both Billi and Zip are Australian brands, which is fitting given that Australia is where boiling, chilled and sparkling water taps first gained real popularity. From a design standpoint, both offer a wide range of tap styles and colours, as well as different system capacities for residential and commercial settings. Both also include advanced water filtration that removes sediment, chemicals and some heavy metals, and protects the boiler element from scale buildup.

The filter difference

One practical difference worth knowing upfront: Billi units can only use genuine Billi filters. They contain a chip that registers in the unit. Zip units can take either a genuine Zip filter or an aftermarket compatible filter, which gives you more flexibility on ongoing costs.

Billi systems also have a filter lockout feature. If the filter is not changed within 12 months, the system gives you a few weeks of notice and then stops dispensing water until a new filter is installed. Keeping the filter fresh protects the boiler from scale and prevents bacterial buildup, but if you want to keep your filter options open, another brand may be better.

How they chill the water

This is one of the more meaningful technical differences. All Zip under-bench units use an air-cooled condenser, which blows air through the system to chill the water. Most Billi units use a water-cooled condenser instead.

In practical terms, air-cooled systems need ventilation space around the under-bench unit, which often means cutting vents into the cupboard. Water-cooled systems do not need this space, so installation into an existing cupboard can be simpler. If avoiding cupboard modifications matters to you, that is a solid reason to consider a Billi.

Warranty

Billi offers a two-year warranty and Zip offers three years, both covering parts and labour with a technician sent to your home. Zip also includes a two-year extension covering the internal tanks specifically, in case they leak or fail. Tank failures are rare in practice, but it is a reassuring addition.

So, is Billi or Zip better?

It depends on what matters most to you.

Billi units tend to be a little cheaper, particularly the residential models. If upfront cost is a priority and you are comfortable with annual filter changes, Billi is a solid option. If you prefer more flexibility on filter sourcing, a longer warranty, or a system designed for heavier commercial use, Zip has the edge.

And if you want to avoid cutting vents into your cabinetry, some of the Billi water-cooled models sidestep that requirement entirely.

What does installation cost?

If you are replacing an existing system, you are mostly paying for a technician's labour. Expect somewhere between $300 and $600 depending on your location. In metro areas, a typical job might involve an attendance fee of around $150 plus two hours of labour, coming to roughly $450.

Installing into a new location costs more, usually $600 to $900, because additional work may be needed for ventilation, a new water connection or a power point. If you have a stone or engineered stone benchtop, factor in around $200 for a stonemason to cut the tap hole cleanly. It is worth getting a specific quote before you proceed, as installation costs vary.

How long do they last?

A well-maintained Billi or Zip system typically lasts 6 to 10 years. Like any appliance, some will go longer and some will run into issues earlier.

Our general advice: for any system over five years old, always get a repair quote before approving the work. Older systems can become expensive to repair, and what looks like a straightforward fix can trigger other issues, pushing the total cost close to what a replacement system would have been.

Can I change the filter myself?

Yes, and it will not void your warranty. We have step-by-step video guides covering filter changes for the Zip Hydrotap G4 and G5, and the Billi Quadra, Eco, Sahara and Alpine. Links are below.

Are there cheaper alternatives to Billi and Zip?

Yes, quite a few. The key difference is how water is dispensed. Billi and Zip use internal pumps in both the hot and cold tanks, so they can deliver water consistently at temperature even after repeated use. Most lower-cost alternatives use mains water pressure to push water through the tanks instead.

The tradeoff: as you dispense multiple cups, room-temperature mains water enters the tank to push out the hot or cold water, which causes the temperature to drift. This is not usually a problem for a home or a small office. You wait a minute, the tank recovers, and you get another few cups at the right temperature. But in larger commercial settings, or anywhere consistency across a full day of use matters, it becomes a real limitation.

On the upside, cheaper systems tend to be more reliable day-to-day because they have fewer moving parts. And when they do need servicing, maintenance costs are lower.

If you are in a home or a small office and working to a budget, checking these alternatives is worthwhile. For any setting with more than around 20 regular users, we would stick with Billi or Zip.

Here are some alternative systems for low-use applications: