As with any septic system its life depends on how the system is used or abused by the occupying family. A conventional septic system, using layers of sand and gravel to filter the effluent might last 15-20 years. All conventional systems fail because the filtering bed (disposal field) becomes so saturated with bacteria and biomat scum that it can no longer effectively filter the septic tank’s effluent. At this point you are looking at a $30-$40,000 replacement cost. By having annual service visits to check the Eco-Pure peat moss biofilter system, the technician can determine at what point the sphagnum peat moss’s ability to filter has been exhausted. At this time only the peat moss inside the module needs to be replaced. This timeline, again, depending on the resident’s proper use or abuse, can be anywhere between 8-15 years. At a nominal cost of about $3,000-$4,000 the sphagnum peat moss is replaced and you have a whole new filtering system, much less costly than the replacement of a