Combined DHWS Systems CU and PP-R

In Most cases it is inevitable that CU pipes and PP-R pipes are combined within plumbing systems. With the hot water cylinders CU rulings here in New Zealand, PP-R is always in combination to small degree with CU.

In general New Zealand, consultants and installers are looking to either materials as a complete system and we rarely see large combined system of both materials.

It is important that care must be taken where there is known aggressive water in a region, when combined with high temperature hot water and high flow rates ( velocities ), resulting in chemically active copper ions being pulled out of the CU pipe walls. This is generally restricted to domestic hot water reticulation ring main lines, and can lead to pinhole leaks and pipe failures in the CU.

The copper ions also contaminate the water and can, in certain cases ( where there was a large component of installed CU ) damage an inert material like PP-R. In some documented instances internationally, widespread erosion of upstream CU has released dangerous levels of metal ions into the water stream, and caused damage to the PP-R pipes downstream. We are not aware of any issues with this problem internationally in closed low pressure heating systems.

To avoid this damage both to the copper and the PP-R, it is important to ensure that when checking off your domestic hot water installation, you cover off the key points.

Here are a few tips.

• Temperatures on DHWS do not exceed 70 degrees ( check the factory settings on your cyclinders and infinity ). Where continuous temperatures are required higher than 70 degrees, CU / Stainless is a better option.
• Velocities essentially operate no faster than 1 to 1.5 metres per second, check you have followed the sizing table accurately and that there is no mix up on internal / OD dimension requirements on the plans.
• Ensure the cold water expansion valve is installed on the cold water inlet to the cylinder, and also ensure that the pressure setting is correct to the install and matched to the pressure limiting valve.
• Pressure limiting valves are installed easily accessible on the main supply and settings are as required for the installation.
• Where there is aggressive water, limit the CU use as much as possible.
• Make sure that there is adequate provision for expansion of the pipe and, always use FASER fibre reinforced PP-R pipes on hot water ring mains.

Don't hesitate to ring the aquatherm team regarding any of the above information and cautionary notes, this caution on CU / PP-R applies only to Australia, New Zealand, United States and Canada, due to the common water treatment practices there. This does not affect other regions unless specifically informed by aquatherm GmbH.

Recent examples of Plant Room Installations CU and PP-R.

aquatherm® NZ Limited are thrilled to announce a new innovative fixing system.

Insert, lock, done! 

The BIS RapidRail® offers an unprecedented choice for rail profiles, plus and extensive range of accessories for pipe fixing and rail construction. BIS - Better Installation Systems stands for high-quality system solutions.

The innovative system solutions is the result of an intensive co-operation in the area of market research, development and production.

The underlying principles are:  quality, functionality, reliability and trouble free installation.  

For all light and medium rail applications     Accessories pre-assembled 'ready-to-use'

Quick and easy fixing to the rail   Saves up to 40% fixing time!

For more information on the products click the links below

          BIS RapidRail® Fixing Rail                    BIS Rail End Caps                         RapidRail^® Slide Nut                   BIS RapidRail® Hammerfix

New aquatherm Products

aquatherms climasystem - ecological and economical - the modern way to heat.

High heating costs, raising of dust, allergies, unfavourable distribution of temperature, high flow temperatures, required space for radiator - all this can be resolved, with architectural freedom by the aquatherm climasystem.

The system is in a compact grid constuction for hydronic heating and cooling as well, this system has really taken off in Europe in both residential and commercial applications.  It can be installed simply behind the gib board in both walls and ceiling. Install cost are low and response from radiant heating and cooling is incredible efficient.

Click the link or visit our download section to view. We will be posting more information shortly regarding the release of this product in New Zealand

Climasystem E20100  

The new aquatherm green pipe MF SDR9 RP

aquatherm set the innovation standards in the production of PP-R pipes and fittings worldwide. We are continually pushing developments for product improvement. The current evolution is called fusiolen PP-RP.

With  fusiolen PP-RP we can produce fibre-composite pipes with lower wall thickness by keeping all the well-established advantages.

The new aquatherm SDR 9 catalogue is here. Click the link or visit our downloads section to view. We will be posting more information regarding the release of this product to New Zealand installers, for the replacement of SDR 7.4 faser.

SDR 9