The Dunedin business recently sent two low head water turbines to Papua New Guinea, to pump water and generate power for a new secondary school.
Mr Wansink and his son, Nick, who also works for the company, will travel to to PNG to commission the equipment.
He expected seeing the pumps working, and the subsequent changes they would make to the community, particularly the advent of running water, would be the "biggest buzz" of the trip.
The turbine was developed in Dunedin by the late Roy Martin many years ago, but "sat in limbo" for a long time.
The "unique" aspect was the low head and it produced "extraordinary" pressure of water working with exceedingly low heads but with a greater water flow. It would be generating 630W over a 700mm fall.
The company supplied turbines to Bougainville in 1998, which eventually spilled water and electricity to a secondary school, having sat in Port Moresby for about three years.
They were later "blown up" by the rebels.
The latest PNG project came about through former Dunedin man Stuart King, who has lived in PNG for many years, and contact with the Governor of New Ireland, a province to the northeast of mainland PNG.
The governor wanted to raise the standard of living for his people. The project, which was worth more than $100,000, had been funded by the provincial government.
Mr Wansink knew little about the area, and was not yet sure when he would be going over. He had heard that the only way in was by walking, but he did not know what distance that would be. He expected they would be over there for between one and two weeks and he is looking forward to what was going to be a "a very unusual" experience.
It was not just a matter of supplying the turbines, but also doing the associated cabling, lighting and distribution around the school.
A test rig was built at the firm's Wilkie Rd site to try out the system and prove it worked successfully as there is "huge" potential globally, including other sites in PNG. The World Health Organisation had also showed an interest, he said.
There have been many changes at E.B. McDonald Ltd since the company was first registered in 1955. At that time, it was very much agricultural-based and held the International Harvester agency.
Mr Wansink's father Joe came from Holland in the early 1950s and gained an apprenticeship at the business, later buying it in the 1960s. Greg Wansink, who returned to the firm in 1987 after some years away, said there were now four main areas of focus.
The turbines were one facet they intended putting a lot of effort into. There was also the Perkinz range of sheep handling equipment, design and building of conveyers and materials handling equipment, and cherry grading equipment.
