HeatLink has launched its new F1960 PEX-a Potable Water Expansion System featuring PureLink Plus PEX-a tubing, high performance polymer (HPP) fittings and multiport tees, no lead (Eco)brass fittings, and PEX-a expansion rings. PEX-a Expansion Rings use the strong shape memory of PEX-a to form a watertight seal. The PEX-a tubing and expansion ring are expanded with a specialized tool and allowed to contract in order to form the connection. As the PEX-a contracts the connection will strengthen. The PEX-a process produces a higher degree and greater uniformity in crosslinking, resulting in product with significantly improved material properties with respect to temperature, pressure, strength and chemical resistance. HPP and No Lead Brass fittings are available in ½-, ¾-, and 1-inch sizes for all small dimension plumbing needs.