Inline Equipment Routine Maintenance Sydney Water Corporation; 2 off 650mm Diameter Penstock Valves not opening; AJM United was called out to identify the problem by means of process of elimination. The works involved working in confined space and required double isolations. Call out Service Learn more about how to Register to our 24hr Enquire Here Call our Maintenance Division and our friendly staff will be happy to assist you with any queries. Contact Us Maintenance DivisionChutes & Wear Plates Conveyor Maintenance & Pulley Alignments Inline Equipment Routine Maintenance Mechanical Equipment Service and Repairs Onsite Blasting & Painting of in-situ items Pump Service & Laser Coupling Alignments Scheduled Plant Shutdowns Service & Refurbishments of existing pipe systems Service & Refurbishments of Tanks & Pressure Vessels