Hole grub


Catalytic pitting
occurs if, for example, other metals from outside - mostly iron - are introduced into a water-bearing copper pipe and deposit on the inner wall of the water main piping.In an electrochemical series initiated by two different metals, catalytic currents or potential differences are generated. As a result of this, the iron little by little eats its way through the copper pipe until a small hole is created and water escapes.

Pitting due to aggressive water
may, for example, occur if water from two springs is mixed. Undesired side-effect - the unsaturated water eventually attempts to retrieve the missing mineral metals from the domestic system, that is, from themains. This, in turn, results in mains leakage.

Pitting through low-mineral water
may occur if water becomes aggressive because it is very soft, that is, if it contains very few minerals.


WELLAN 2000 neutralises the potential differences to a large degree and thereby minimises the danger from pitting.