Complete Purasan EX Treatment System - 12V
Raritan Purasan Waste Treatment System is suitable for all marine sanitation
needs. The Purasan EX was originally developed for the freshwater lakes in
Kentucky as an alternative to the Lectra/San.
This Type I Marine Sanitation Device (MSD) has become increasingly popular with
many users in both salt and freshwater. Raritan believes that treating a single
flush at the source and discharging into tidal water is far more effective than
risking having a holding tank dumped overboard when a pump-out cannot be found
or is not functioning. Each user has unique needs when boating and for many a
holding tank may be the best solution while some prefer to treat and discharge.
There are a few things to consider when choosing a Type I MSD.
While Treatment is required inside the three-mile limit there are areas that
prohibit discharge from Marine Sanitation Device. The areas that do not allow
discharge of any type are called No Discharge Zones and these zones are
specific, at this time, to treated black water only. So, any vessel operator or
owner should consider the amount of time spent cruising, the areas in which they
will be cruising and the availability of pumpouts. A holding tank should never
be discharged overboard.
The Purasan EX is a flow through system which means that the toilet is connected
to the tank and the tank is connected to the thru-hull. With each flush of the
toilet the waste enters the tank where a small amount of disinfectant is
introduced to neutralize the waste. At the same time an equal amount of treated
waste is forced out of the tank and overboard.
Purasan Improvements
The tablets used are very similar to the mixture used in commercial waste water
treatment plants. When the toilet flushes a small amount of water is run over
the tablets to create a disinfectant that drains into the tank and a high-speed
macerator inside the tank breaks down waste and ensures that the disinfectant
comes in contact with the waste. This system does require the user to buy
tablets to keep the system functioning properly. While the original Purasan
remained largely unchanged for a long time the newest version the Purasan EX has
added a control that will notify the user when tablets need to be added.
Another improvement in the Purasan EX over the original design is the addition
of an air pump that forces the water down into the treatment tank. This makes
mounting of the system easier and prevents the tablets from disintegrating too
fast. While it was originally designed for just freshwater use and for use with
specific toilets it can now be used with almost any marine toilet. The only
freshwater required is the water that passes over the tablets. However, toilets
can flush with either salt or freshwater.
PuraSan EX Promo Sheet
Purasan Ex Owner's Manual
WARNING:
This product can expose you to chemicals including Di-n-hexyl Phthalate (DnHP)
which is known to the State of California to cause reproductive harm, and
Vinyl Chloride which is known to the State of California to cause cancer. For
more information go to 
