What part on the tankless hot water heater is most likely to fail?

by Water Heaters on April 24, 2010

Our ph is 7.8 -8.0 and a very high carbonate hardness. Have to replace heating elements often. Am unable to use a water softener to ease the situation. How does hard water affect the tankless heater?


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{ 4 comments… read them below or add one }

godsmackedmetwice April 24, 2010 at 10:04 am

Could be a scale build up inside the actual exchanger.

water April 24, 2010 at 10:04 am

It doesn’t. that water doesn’t stay in the tank long enough for it to take effect. so just like every tankless heater yor exchange will go first. depend if it was install properly

lineblock April 24, 2010 at 10:04 am

The water recycle pump.

smrtgy2000 April 24, 2010 at 10:04 am

pump water sits there the longest

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