McMinnville officials are attempting to prevent fines levied by the state and are urging water customers not in compliance with the state’s backflow prevention requirement to get there as soon as possible.Tennessee requires property owners to install an approved backflow prevention assembly. Those needing one are, among others, domestic water service, fire protection systems and/ or connections, nursing care facilities, medical buildings, construction sites, all fountains, wells, water softeners and other treatment systems, swimming pools, lawn irrigation systems and on all fire hydrants connections other than those by the fire department in combating fires.“While newer structures are probably in compliance, older structures probably won’t be,” said McMinnville Public Works director Bill Brock. “I think the state now wants everyone to have one.