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VisqueenPro Gas Vent Box comprises a galvanised steel base with a 110mm pipe inlet and adjustable feet for leveling purposes and to secure the box within the concrete surround. When installed, in plan view, the visible area of the vent box is approximately 530mm x 153mm. The 499mm x 123mm vent box lid is secured with locking bolts. Each vent box provides a free air flow capacity of 20148mm².
Visqueen is a trading name of British Polythene Limited a company registered in England and Wales with Company Number 350729 and having its registered office at Sapphire House, Crown Way, Rushden, Northamptonshire, NN10 6FB
