Installation Requirements

Design Considerations

Pipework support

All pipework should be supported by the use of appropriate clips, brackets or supports. Please refer to requirements listed in AS/NZS 3500 for specific details in relation to the particular application.

Distance between fittings

Due to the reforming of the tube profile when pressed, it is advised that a minimum distance, is allowed between each fitting.

Tube SizeMinimum Clearance F (mm)
15mm 5
20mm 5
25mm 5
32mm 10
40mm 15
50mm 20
65mm 15
80mm 15
100mm 15

F – Clearance Between Fitting Ends

Minimum clearance requirements

The following minimum clearances are required from structural components to allow operation of tool for press fitting.

Tube SizeMinimum Clearance F (mm)
  Romax Compact Romax 3000
15mm-25mm 35 45
32-50mm - >45
65mm-100mm - >45

Tube SizeMinimum Clearance F (mm)
ABCDE
65mm 90 130 90 90 150
80mm 95 145 95 100 165
100mm 110 165 110 115 190

Pipework protection

Copper has a high resistance against corrosion. However, in some cases external protection may be necessary against corrosive conditions. Refer to AS/NZS3500 for full pipework protection requirements.

Localised annealing

To ensure proper sealing of both the brazed and >B< Press fitting the following minimum distances must be maintained between the two fittings.

Tube SizeMinimum Clearance F (mm)
15mm 5
20mm 5
25mm 5
32mm 10
40mm 15
50mm 20
65mm 15
80mm 15
100mm 15

Note: It is important that there is no residual solder or other foreign debris on the tubing to be inserted into the >B< Press fitting. The surface condition on the area of press joint should be as tube standard AS 1432.

Brazing near >B< Press fittings

Caution – Brazing or soldering near to >B< Press joints should be avoided as this may cause the seal to degrade due to heat transfer. The table below states the minimum distance away from the press joint which is acceptable to braze. If this distance cannot be maintained then adequate precautions must be taken such as fabricating the brazed section prior to assembly with the press fittings, wrapping in a wet rag or applying a heat barrier spray, to prevent heat transfer to the press fitting during brazing.

Tube SizeMinimum Clearance F (mm)
15mm 350
20mm 500
25mm 650
32mm 800
40mm 1000
50mm 1300
65mm 1600
80mm 2000
100mm 2500

Flushing of water installations

When the installation is complete, it is essential to flush with water to remove dust and debris in accordance with AS/NZS 3500.

Testing and commissioning installations

The unique pressing indicator is a specially designed O-ring. It has a reduced section in two positions that allows water or air past the sealing element of any unpressed connection, thereby providing a visible leakage point during the commissioning of the system. Unpressed fittings are identified by pressurizing the system with a pressure range of 100 kPa to 500 kPa for water and 2.2 kPa to 300 kPa for gas. When the fitting is pressed, the O-ring material compresses, filling the gaps, creating a leak free joint. Final testing of the system should be conducted in accordance with AS/NZS 3500 and/or AS/NZS 5601.

Earth continuity

>B< Press fittings maintain earth continuity without the need for additional continuity straps.

Connection to other materials

When connecting to other materials with the use of a >B< Press threaded adaptor it is recommend that threaded connections be installed first, prior the fitting being pressed. When tightening the adaptor ensure that the wrenching flats are used, not the tube section of the fitting.

Fittings in freezing temperatures

Copper tube and press fittings should be protected against freezing. Expansion of the water when it freezes can cause damage to the pipe or fitting.

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