Multiport systems are used to increase ease of fuel delivery on petrol station forecourts and feature two small covers located within the larger manhole cover.
Multiport systems are used to increase ease of fuel delivery on petrol station forecourts and feature two small covers located within the larger manhole cover.

A composite multiport sump system made by OPW in the UK been approved by the California Air Resources Board (CARB).

CARB is reportedly one of the two primary standards for vapour recovery in the US. Multiport systems are used to increase ease of fuel delivery on petrol station forecourts and feature two small covers located within the larger manhole cover which can be removed to insert the two hoses necessary for fuel delivery and vapour recovery.

Composites can impart light, strong, non-corrosive properties which allow them to withstand heavy loads, such as trucks, while still being safely and quickly manually removed when access is required. Corrosion resistance is also key, as water and fuel (especially prevalent in petrol station) cause corrosion, breaking the watertight seal around covers, allowing water ingress into sumps over fuel tanks. 

This story is reprinted from material from OPWwith editorial changes made by Materials Today. The views expressed in this article do not necessarily represent those of Elsevier.