Two McElroy DynaMc Auto models are now available for fusing high-density polyethylene pipes sized from 63mm up to 340mm. The DynaMc Auto 250 and 412 are McElroy’s newest fusion machines. McElroy designed the low interfacial pressure DynaMc Auto machines to be extremely powerful and sturdy, while maintaining a small, portable and modular design. The DynaMc Autos are also ideal for in-ditch fusion situations. The DynaMc Auto 250 machine is capable of fusing pipes sized from 63mm to 250mm. The 412 machine has fusion capabilities from 110mm to 340mm. Both machines are comprised of five components – the control unit, facer, power unit, heater and jaw carriage.