Private sidings were in use at Papanui to serve neighbouring industrial customers including:
Firestone Tyre Company, 1948–?.

Sanitarium Health Food Company, 1923–1986?.

Borgfeldt’s, 1882–1916; Frank Drury & Sons (blacksmith), 1916–29 February 1972; Thomas Brown (coal merchant), 1972–?.
 Siding had fallen into disuse by 1980.

The Sanitarium factory remains open but the Firestone factory closed in 2009.
Private sidings were in use at Papanui to serve neighbouring industrial customers including:
Firestone Tyre Company, 1948–?.
Sanitarium Health Food Company, 1923–1986?.
Borgfeldt’s, 1882–1916; Frank Drury & Sons (blacksmith), 1916–29 February 1972; Thomas Brown (coal merchant), 1972–?.  Siding had fallen into disuse by 1980.
The Sanitarium factory remains open but the Firestone factory closed in 2009.
Papanui railway station