After running a brown bath and having kids fall sick from contaminated rural water tanks, buying Whanganui franchise Safe H2O seemed like an "appealing opportunity" for Richard and Anna Campbell.
Safe H2O was founded last year by a Manawatu couple Chad and Tracey Meads using new technology to keep rural rain and bore tanks clean without having to dispose of the existing water. The Meads are now in the process of selling franchises across the North Island.
Six weeks ago Mr and Mrs Campbell bought the third franchise and plan to kick-start the business mid June.
They have always lived rurally and have had water tanks that have never been properly filtered.
"I've once run a brown bath and last year we had a woman from the Ministry of Health come check our water tank for giardia after our girls kept getting sick - so the health aspect to Safe H2O really appealed," Mrs Campbell said.