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Aquatherm Australia Pty Ltd
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IPA (The Institute of Plumbing Australia) Statements on AS/NZS 3500.4 and the lack of coverage of Hot Potable Water Reticulation Systems (HWRS) under our Australian Standards.

"History tells us that around the turn of the century many areas of plumbing previously associated with complex buildings and controlled by specialist engineers moved to mainstream plumbing. Forced circulation heated water is a prime example and although limited texts were available for guidance they were never replicated in the plumbing standards or regulations until the mention of pending inclusion in 2003 that did not happen albeit partially until 2015 with real inclusion in 2018 yet to be referenced by regulation in 2019. This 16-year time lag has seen technology moving ahead and oversight reducing together with new ways of contracting that appear to remove any design oversight further reinforcing the need for registration of plumbing design".

And the rest of (the plumbing) world moves on.....
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9/11/18
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Another day of aquatherm blue pipe MF Ti 250mm training on site!
Australia is looking more and more “true blue”.

aquatherm blue pipe SDR11 MF Ti 250mm L= 11.6 mtr. for district cooling.

We've got a pipe for that!
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9/6/18
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High Rise retrofit by by aquatherm - Cleveland, Ohio (USA).

How easy is that!

https://mechanical-hub.com/an-extraordinary-retrofit-for-clevelands-standard-building/
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This picture shows you the temperatures where Legionella will flourish or die.

Legionella will grow at temperatures of 20°C - 55°C.
Legionella will die at 55°C in 5-6 hours.
Legionella will die at 60°C in 32 minutes.
Legionella will die at 66°C in 2 minutes.
70°C - 80°C is disinfection range.

Why in Australia have we been and are we still running our Hot potable Water Reticulation Systems (HWRS) 24/7 at temperatures of 65°C+ (sometimes up to 82°C)? A minimum temperature of 55°C should suffice since Legionella will die at 55°C.

It would have been wise if our latest AS/NZS 3500.4:2018 had covered this minimum HWRS temperature of 55°C (in the return line) and 65°C maximum (in the flow line), as per the Draft version of the AS/NZS 3500.4:2018. Some party in the WS-014 committee thought it would be better not to cover this 65°C maximum (in the flow line)....

Thermostatic balancing valves could be an option. Thermostatic balancing valves are used in Europe (and elsewhere in the World) in hot water reticulation systems.
These thermostatic balancing valves have a factory temperature setting of around 58°C and an adjustable temperature control range of 50°C-65°C, not 65°C+ !.

These thermostatic balancing valves only open up (once a day) when the hot water temperature goes over 70°C (“Disinfection range”). The hot water units simply increases the water temperature above 70°C for a certain period to disinfect the whole hot water reticulation system against Legionella. This is all in compliance with DIN 1988-3 (EN 806-3), W551 and W553. Should a disinfection become necessary, the water temperature has to be increased to more than 70°C. According to the DVGW work sheet W 551, this disinfection temperature has to be maintained for at least 3 minutes (not 24/7!) at each circulation point - draw off point. The Thermostatic balancing valve supply the required volume flow in each riser and support the thermal disinfection.

The rest of the day the hot water reticulation system runs at the lower (58°C) temperature. By doing this the end-user (residents) will save a lot of energy (and $) and their HWRS, including their hot water units and pipe system, will last longer as well.

Oventrop (Made in Germany), represented in Australia by Tradelink:
http://www.oventrop.de/article.asp?art=4206706&sprache=EN

Kemper,(Made in Germany) not represented in Australia:
http://www.kemper-olpe.de/fileadmin/contents/kemper/pdf/Multi-Therm_neu_08_12.pdf

TA (Tour & Andersson) (part of the IMI Group, made in Sweden), represented in Australia by Reece:
https://www.imi-hydronic.com/sites/EN/en-gb/products/thermostatic-control/tap-water-control/circulation-valves/TA-Therm/907d6d13-4bb2-4728-8bfd-30282b56c093

Caleffi (Made in Italy) also have a thermostatic balancing valve in their program.
Factory pre-setting temperature for hot water recirculation is 55°C.

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8/16/18
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aquatherm keeps on growing: More than 600 employees have been working in the aquatherm-group since this month. We are surrounded by a smart team to help us achieve great success. Let´s keep doing it!
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New aquatherm North America van.
Cool! Or should I say "Hot"? Either way, "We've got a pipe for that".
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Please have a look at the new "aquatherm TechTV".

The first 2 topics are:

1) Pipe Support Considerations
( http://www.aquatherm.com/support-considerations )

2) Mixed Cu/PP-R Hot Potable Water Reticulation Systems (HWRS)
( http://www.aquatherm.com/mixed-systems ).
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Here's how Flint's water crisis happened.

"Failing Flint: Who knew what, and when?"
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Aquatherm is still growing.
Why? Simply because there is more and more demand for PP-R pipe systems from all around the world.
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7/20/18
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Saputo milk factory in Leongatha (VIC) is using the aquatherm blue pipe SDR17.6 160mm for CIP (NaOH; Caustic Soda) waste drain.

"True Blue"!

http://aquatherm.com.au/Web/non-potable-water-pipe.html

http://aquatherm.com.au/Web/climatherm-ot.html

http://aquatherm.com.au/Web/district-heating-and-cooling.html
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7/19/18
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