The 450mm Screw-On-Lid is the standard lid for all medium and heavy-duty Vertical and Low Profile chemical tanks, the 2 500 litre MultiSlim, 20 000 litre Vertical water storage tank, as well as all horizontal tanks from 1 500 to 5 500 litres.
It is sold as a complete unit that includes the lid (which is pre-fitted with a seal) and a pre-moulded threaded ring which is bolted to the tank, allowing the lid to simply screw into the ring. Manufactured with a breather, it avoids any negative pressure from building up inside the tank.
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