Main centres: | 1-3 business days |
Regional areas: | 3-4 business days |
Remote areas: | 3-5 business days |
Vent valves were designed as replacement for vent pipe used to ventilate drainage systems. Reduces the expense of the vent pipe and roof flashing. The one-way valve acts as a vacuum relief valve by letting air in. Internal or external use. The two-way valve lets air in and out. External use only.