Ellwood household to CRA 8.7.17

solar HWC element also corroded

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Dyers Pass Road near the Cracroft Reserve reservoirs, 25m drop from there, low pressure had afflicted other homes nearby too. But that matter has been resolved, a few years back.

Change of cylinder from copper, for a solar system installed July 2009, that led to an element failure in 2014 ($230 to replace) then again in July and December 2015. The latter repair changing to an “industrial” Hermetic element ($370 for this).

A stainless steel, mains pressure, Solocombo model Solar Master tank from Enviroplumb Ltd (gone bust?) – wetback, solar, electricity capable – generally working well.

A sacrificial anode may be tried if the element fails again.

Reading into the technical issue with the Ellwoods, a change of cylinder element (metal) is a lot of the tweak needed in resolving this fault. That is because of the chemical reaction set up inevitably in a weak base water solution drawing metal ions. i.e. Stop the reaction inside the HWC tank by choosing different element metal to leach.

Refs. wikipedia.org/wiki/Hard_water +
Impacts of Water Quality on Residential Water Heating Equipment – U.S. Department of Energy, November 2013 – Pacific Northwest National Laboratory

Is Christchurch water ok?

What’s up with Christchurch water? – for supplier resolution

Kia ora koutou,

We have been asked: what’s up with Christchurch water?

Hot-water cylinders are regularly damaged and expensive to repair, so this website collates the facts towards resolution by suppliers of water and cylinders.

‘Happy reading’ – we hope you find the shared information useful.

Waimarie ~ peaceful waters

The Editor
Christchurch Water
Cashmere Residents’ Association