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|
|PB-1 Pipe Volume (Litres)|
|Length (m)||12mm Pipe||15mm Pipe||20mm Pipe||28mm Pipe|