Per their website:
We recommend that the Trident have a routine service of a small number of its parts in the window of 18-24 months. And, while we will have a kit available for customers to do this maintenance themselves, we strongly suggest that the Trident be sent in to our service center to have this performed.
All of the particulars relating to this recommended maintenance will be released at a later time, but at this time we can say that the parts kit to do it yourself will be less than $100 and we are targeting between $150-$200 if sent in to be completed by our service technicians. In addition to these cost estimates, the service completed by Neptune Systems will have several pricing options including an advanced replacement option.