The McElroy McCalc® calculates fusion parameters based on industry standards and specifications for McElroy hydraulic fusion machines. Select from a list of McElroy fusion machines and fusion standards, then enter pipe size, wall thickness and drag pressure. Tap the "Calculate" button and McElroy McCalc® displays the pressures and times for fusion cycles and heater temperature range according to the selected standard. Features: - A list of McElroy hydraulic fusion machines - Industry standard