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8906 posts

Uber Geek

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  # 2004200 28-Apr-2018 17:48
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why did you not upgrade to mains pressure?

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Ultimate Geek

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  # 2004241 28-Apr-2018 19:38
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The area was originally a low pressure zone.  There have been some watermain upgrades and I could have gone to mains pressure.


The original cylinder lasted 22 years, and the new one will hopefully last 20. I needed a narrow 560mm cylinder to fit and 250-270 seemed to be the limit.


Had recently replaced kitchen mixer and low pressure shower mixer.


Plumber suggested around 7 year life for a mains pressure cylinder.


I had looked at all options including heat pump systems, the change over cost was too much and again the life span of the systems seemed too short, or unknown. 


I am happy with low pressure, it works for me. I was concerned that mains pressure may use more hot water, unless restricted at mixers and taps.



3885 posts

Uber Geek


  # 2004288 28-Apr-2018 20:29


Plumber suggested around 7 year life for a mains pressure cylinder.

Why did he say that? As you can get stainless steel cylinders that have 20 year warranties. And I quite often come across mains pressure cylinders that have lasted over 30 years before failing.

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Ultimate Geek

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  # 2004295 28-Apr-2018 21:05
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We have hard water, although it is treated to raise ph. Same advive from other plumbers and builders. The newer cylinders are not lasting like the old ones. My father has a 1970's house with original cylinder. Do have to replace elements.


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Ultimate Geek

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  # 2039439 18-Jun-2018 09:40
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The PV Diverter system was not working well, heating and cooling too quick and heating from grid whenever hot water used. The temperature probe had to be relocated to about 1/3 height in the cylinder. It's much more stable now and and I don't see it cooling down or heating from grid.  The outer case needed to be drilled/cut and the probe inserted under the foam insulation against the cylinder. 


Overall the cost of The Paladin installed does not seem to be much cheaper than the Immersun option which I would prefer as it is much smarter.  The Paladin cost me around $1100 installed including a new switch (on, off, manual) that was not really required.  The typical installed cost of the immersun is $1500.


I would hope that we can get all our water heating from solar now. 


5385 posts

Uber Geek

  # 2039586 18-Jun-2018 12:28
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As you can get stainless steel cylinders that have 20 year warranties.


But if you read the conditions on the 20 year warranty it will usually say something like "annual inspection by qualified plumber required" plus other conditions no-one is going to bother with.


1076 posts

Uber Geek

  # 2039777 18-Jun-2018 14:22
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A lot of enamel cylinders have anodes in them that protect them from corrosion and you need to replace/renew the anodes at least every 10 years to make the cylinder last. I didn't know this until after my cylinder failed.


Appreciate the updates. Let us know weather or not it works out in the long run. I don't mind stuff that isn't too technological. If it requires an app or web interface or cloud account to work it, I loose interest fast.

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