For heavy-duty installations requiring more than a standard No Hub coupling
More effective joint movement restraint - Stainless steel strap bands are 12.5% thicker than on traditional no hub couplings providing a positive seal when properly torqued to 80 in/lbs
Stronger, more uniform scaling capacity - Axially slotted clamp bands tighten independently to accommodate most any variances in outside diameters of cast iron pipe and fittings being joined
Greater surface load bearing - Wider 304 Series stainless steel shield accommodates additional sealing clamps to provide for greater load bearing