Why use the Buteline 12mm system?
play_arrow Return to FAQsWhy use the Buteline 12mm system?
Buteline 12mm enables compliance with the efficiency requirements of NZS 4305:1996 Table 5 (shown below), which says where the pipeline supplying the kitchen sink tap is a combination of nominal bores, the total volume of water in the pipe run shall not exceed 2 litres.
A 25 metre run of 12mm Buteline PB-1 pipe will hold 1.8L of water.
Reduced volume of water in the pipe = Hot water arrives much quicker to the tap and less water is wasted. Less hot water sitting in the pipe after taps are closed = less energy wasted.
| NZS 4305:1996 Table 5 | |||
| Acceptable Maximum Pipe Lengths (Water Heater to Kitchen Tap) | |||
| Nominal Pipe Diameter | 10mm (12mm) | 15mm | 20mm |
| Length | 25m | 12m | 7m |
| PB-1 Pipe Volume (Litres) | ||||
| Length (m) | 12mm Pipe | 15mm Pipe | 20mm Pipe | 28mm Pipe |
| 1 | 0.07 | 0.13 | 0.27 | 0.41 |
| 5 | 0.37 | 0.67 | 1.3 | 2.0 |
| 10 | 0.73 | 1.3 | 2.7 | 4.0 |
| 15 | 1.1 | 2.0 | 4.0 | 6.1 |
| 20 | 1.4 | 2.7 | 5.4 | 8.1 |
| 25 | 1.8 | 1.8 | 6.7 | 10.2 |