This company’s ring-grip pipe and tube couplings (photo) are heavy-duty, self-aligning couplings for either high pressure (up to 150 psig) or full-vacuum-rated applications. These couplings can be installed quickly and easily, reducing costs. They are available in 2- through 10-in. pipe sizes and are made for use on plain-end pipes or tubes, regardless of pipe- or tube-wall thickness. Other features include self-grounding, vibration resistance and externally leak-proof, with an extremely high end pull for difficult applications. No machining or grooving is required to maintain pipe or tube integrity. Every coupling becomes a union, providing easy and low-cost maintenance when piping components need replacement. Numerous standard gasket materials are available to meet special design conditions, such as food-grade requirements, higher temperatures or special chemical-resistant applications. — Tuf-Lok International, Madison, Wis.