Dual bolt construction for pipe sizes 75, 90 and 110 mm
Increased comfort when tightening the large diameters (75 - 90 and 110 mm).
Not only is a lot less force required when tightening the clamping-coupling, the force is also nicely distributed over the fitting, so that it seals even better and more evenly over the entire surface of the clamping piece and the pipe.
Waiting and re-tightening the bolts up to 30 minutes later is no longer necessary, which results in faster and therefore cheaper assembly without risk of leakage owing to forgetting to retighten.
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