The Cyclopedia of New Zealand [Taranaki, Hawke's Bay & Wellington Provincial Districts]
The source of supply for the borough is at the Waiwakaiho river, about three miles and a-half outside the town. The water is secured at the intake, and is brought in by gravitation, through steel pipes, for a distance of one mile to the reservoir; in its course, it passes through a tunnel of three-quarters of a mile. The capacity of the reservoir is equal to one million gallons. The water is filtered before it enters the reservoir, and is led into the town, and laid on to all parts of the borough, by means of steel pipes. The water supply also serves adjacent suburbs, and is used for household supply, drainage, and power purposes. It gives a daily pressure of 133 pounds to the square inch, and increases during the night to 150 pounds pressure. The entire cost of the waterworks has been £25,400.