(see attached jpg)
I performed the replacement you are contemplating after the unit failed subsequent to 9 months of frequent use during a trans-Pacific
passage in 2009. (The shuttle valve retainer threads fatigued - red circle) I had the added complication that the 'new' membrane that came with the manual unit assembly was defective so my final configuration included the old front housing (blue circle) and membrane tube. I chose to use the manual unit's
raw water feed and brine discharge tubing. Not as elegant an
installation as the original with the hard plastic manifold (black circle) but satisfactory for the occasional use profile since cruising local waters of
Australia. After removing all the manual paraphernalia, the unit assembled as described by the
overhaul instructions in the manual for the
electric motor version. The unit tested satisfactory. We found the Survivor 35 capacity satisfactory for our 2 person crew aboard our 41 foot Tartan. (90 gallons
storage and used 3 to 4 gallons per day when on transit) We never had to fill
tanks from shore sources though we chose to do so at couple of stops. I would replace the 35E with the 40E should we choose
blue water cruising in the future. The material used in the 35 construction is not tough enough for cruising though is quite satisfactory for short term use while awaiting
rescue or occasional local
water excursions. CHEERS! LAEL