We receive fairly a couple of enquiries regarding stainless steel water tanks compared to vitreous enamel lined sizzling water tanks when utilized in solar scorching water applications. The next are a couple of points that can assist you in your choice as to which hot water tank fits your wants and situation
Photo voltaic rated tanks and glass lining
Photo voltaic rated glass lined tanks have a considerably thicker vitreous enamel lining than a regular mains stress hot water heater, because of the high temperatures skilled from the return line. It may possibly withstand very high to boiling water temperatures below pressure. Vitreous enamel in normal water heaters dissolves above 70 levels.
Stainless steel tank power
Stainless steel tanks are only as strong because the seam welds. Nonetheless, they often have a ten year guarantee over normal 5 yr warranty (minimal required by regulation) of glass lined tanks. Additionally they value on average $300-$four hundred more than a glass lined version.
The poorer the water high quality, the stronger the argument to maneuver away from stainless steel tanks, as impurities within the water can eat away on the silver in the weld, inflicting pinhole leaking and eventual failure. Whereas stainless steel tanks have longer warranties, no producer will honour a warranty if the TDS (Total Dissolved Solids) of the water is in excess of 600 ppm (parts per million).
Anodes and hydrogen production
Glass lined tanks have a magnesium sacrificial anode that ensures potable water high quality (drinkable), by attracting the impurities away from the surrounding water provide. The anode can knock against the glass and electric factor, inflicting “hot spotson the element, or glass cracking/crazing, if transported mendacity down. It is vital that they’re saved and transported standing upright.
The release of hydrogen gas by an anode can typically occur if the water isn’t used for an extended period of time. Small portions of hydrogen are produced that usually stays dissolved and flushes away as hot water is drawn from the tank. Depending on the water quality and the world where the water heater is put in, there may be a level of hydrogen build up in the tank if the water heater hasn’t been used for two or extra weeks.
However, even with a stainless steel tank, if water is left unused for 2 weeks, you should have some hydrogen construct-up; which is indicated by the spurting of a hot water tap when it is first opened.
An aluminium anode can be used in case your water supply is of poor water high quality in order to extend the life of the tank. You’ll be able to request a “hard wateraluminium anode to be fitted to Aquamax glass tanks as a part of an Apricus photo voltaic hot water system; and if ordered through Vitality Issues, there isn’t a extra cost.
Anodes aren’t really an issue with rainwater tank water, but are positively recommended to be used with bore water, or poor water quality. Melbourne and Sydney water is of a very good to very prime quality. Adelaide is of very poor quality. Tasmanian water is regarded as the most effective in the world!
To combat hydrogen build-up, all water heaters have a pressure and temperature relief valve fitted to Australian Standards. You simply pull the lever and “purgethe tank for 30 seconds you probably have been away on holidays for 2 weeks or more. It will dispel any hydrogen fuel leeched from stagnant water.
If the system is used day by day, the hydrogen doesn’t separate from the oxygen within the water molecules, and this doesn’t happen. Regardless, all tank manufacturers recommend you purge a system at least once every 6-12 months.
Do you produce other questions about choosing a water heater tank best suited to your solar scorching water needs? Contact one in every of our friendly team for no-obligation skilled recommendation before you purchase. Don’t neglect, generous photo voltaic hot water rebates are nonetheless accessible!