pH correction
HALO Acid Neutralizer
The HALO Acid Neutralizer treats acidic or low-pH water — common on wells and in some rain-fed supplies — that corrodes copper pipe and fixtures and can leach metals into the water. It raises the pH to neutral using a natural mineral, with nothing to dose or measure.
How calcite works
The tank is filled with calcite, a crushed white marble that is naturally calcium carbonate. As acidic water flows through, a small amount of the calcite dissolves and raises the pH toward neutral. Because the reaction slows as the water approaches neutral, the system is self-limiting — it will not push the pH too high under normal conditions.
Reducing the acidity stops the water from dissolving copper and lead out of the plumbing, which protects both the pipes and the people drinking the water.

What to plan for
The calcite is consumed over time and is topped up periodically. Neutralising also adds some hardness to the water, so on harder supplies HALO recommends a softener or conditioner downstream — Milani tests the water and lays out the full sequence.
- Fixes corrosive, low-pH water
- Protects copper plumbing from pinhole leaks
- No chemical feed pump to maintain
- May call for softening downstream
How Milani installs and looks after it
Milani installs HALO equipment on the main line where water enters the home (or, for drinking-water and point-of-use units, under the kitchen sink), tests your water first so the system is matched to what you actually have, and sets it up with the correct bypass and shut-offs so future service is simple. Where a unit has replaceable cartridges or media, we tell you the schedule and supply the parts.
At a glance
- Calcite (calcium carbonate) media
- Neutralises low-pH, corrosive water
- Self-limiting — will not over-correct
- Reduces copper and lead leaching from plumbing
- No chemical additives
Warranty
The HALO Acid Neutralizer carries HALO's limited warranty on the tank and valve; calcite media is a consumable. Milani registers the system and handles media top-ups.
Talk to Milani about the HALO Acid Neutralizer
We test your water, size the system to what you actually have, handle the install and shut-offs, and check which rebates apply to your address.
Product information and specifications on this page are reproduced from HALO Water Systems product literature and are provided for homeowner reference.
Milani is an independent installing dealer for HALO Water Systems. HALO®, HALO 5™, H2 ZERO™, HALO ION™, Hydro Point®, Heater Guardian™ and related marks are trademarks of HALO Water Systems and its affiliates. Capacity, efficiency and warranty terms vary by configuration and water conditions — Milani confirms the details for your home after testing your water. This page is not an official HALO Water Systems publication.