01/09/2026
Understanding PTH: What Happens to the Minerals in Your Water?
The PTH manufacturer’s description is that the unit uses a specially formulated alloy core inside a stainless-steel housing. As water passes through the core, a combination of electrical potential differences, weak electric fields and the hydrodynamic/venturi effect influences the behaviour of dissolved mineral particles. The PTH is connected to earth, and the system operates without an external electrical power supply.
How the PTH process can be explained
1. Hard-water minerals enter the PTH
Borehole and other hard water can contain dissolved minerals such as calcium and magnesium. These are present as charged ions and can contribute to scale formation.
2. Water passes through the special alloy core
Inside the PTH, the water passes through a specially designed multi-metal alloy core. According to the PTH technology description, the interaction between the alloy core and the stainless-steel housing creates weak electrical fields, while the internal geometry creates turbulence/venturi effects.
3. The mineral ions are conditioned rather than removed
This is an important distinction: PTH does not remove calcium and magnesium from the water like a conventional ion-exchange softener.
Instead, the claimed mechanism is that the electrical and hydrodynamic effects alter the way the mineral particles interact, reducing their tendency to attach to surfaces and form hard scale. The minerals therefore remain in the water but are less likely to form the same type of adherent deposit.
4. Earthing provides the electrical reference
The PTH is connected to the building’s earth/grounding system. PTH documentation describes the grounding connection as part of the operating principle and states that no external electrical power is required.
5. pH
There is a specific PTH case study reporting that the treated water stabilised at approximately pH 7.2.
“PTH conditions the mineral ions in the water and, according to reported PTH testing, can contribute to stabilising the water around a neutral pH of approximately 7.2.”
