SZ Double Pass HD Series

When you don’t have access to a dock water supply, the SZ Double Pass HD Series takes our SZ technology one step further and purifies water from your on-board watermaker. The Double Pass system has an added tank to accumulate watermaker water for processing, and then quietly rejects about 98% of TDS, removing viruses, cysts, bacteria as well as radioactive contaminants.

Starting at$12,450 MSRP, not including installation Find a Dealer

Standard Features

  • Designed to work with a watermaker
  • 2-in-1 Modular or Compact Frame
  • LCD Backlit Display
  • Tank Switch Input
  • 316L Stainless Steel Flow & Pressure Components
  • Digital TDS Reading
  • TEFC Motor with Thermal Motor Protection
  • Ultra-Low Energy Membranes
  • Computer Controller
  • Made in the U.S.A.

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Spec Sheet

  • szseries3-dropWorks with Watermakers The SZ Double Pass system is specifically designed to work with on-board watermakers. From sea water to potable water to pure spot-free water that’s just 10 ppm TDS.
  • szseries3-98Removes up to 99% of TDS Like softeners, the SZ series will remove hardness from the feed water but unlike softeners, Spot Zero removes up to 99% of the remaining TDS (total dissolved solids) in the feed water.
  • szseries3bSpot-Free Benefits Since dried dissolved solids in water are what leave water spots, removing them is crucial to a true spot-free rinse and to the rest of the benefits purified water can provide to a vessel.
  • szseries3cVessels 40 Ft. & Up From an ice cube in your glass of water to the water your clothes are washed with. Spot Zero is an absolute must for any vessel over 40 feet.
  • szseries3dRecover 66% of Water The SZ series recycles 2 gallons/minute and recovers up to 66% of the feed water, making this the most cost-effective and environmentally friendly freshwater system on the market.
  • szseries3eSimple & Clear to Use Enjoy an easy-to-use LCD controller with digital ppm and temperature readings, as well as flow meters and before /after pressure gauges, for 100% clarity of how the system is operating.

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SZ 4000, 5000 & 6000 Dimensions


SZ Double Pass Consumables

Item NumberDescriptionFrequencyList Price
252404005252404005SZ 45-1001 Spot Zero Sediment Cartridge 4.5” x 10”Replace every 100 hours$16.50
252404004252404004SZ 10KDF2 Spot Zero Heavy Metal Removal 4.5” x 10”Replace every 100 hours$80.00
252404006252404006SZ CCC Spot Zero Chemical Cleaning Cartridge 4.5” x 10”As needed when production becomes reduced$48.00
252404000252404000Spot Zero Replacement Ultra Low Energy Membrane 4039 For PVC Vessel HousingReplace every 1000 hours or 100,000 gallons of use$490.00
252404141252404141Bacteriostatic Re-Mineralizer Cartridge 2.5”x 10”Every 100 Hours$53.50
252404448252404448Spot Zero Replacement Ultra Low Energy Membrane 4041 For Fiberglass Vessel HousingEvery 1000 Hours or 100,000 gallons of use$485.00
252404143252404143Spot Zero Vane PumpEvery 2000 Hours $352.00
252404026252404026Spot Zero MotorAs needed$405.00

SZ Double Pass Accessories

Item NumberDescriptionPurposeList Price
252404090252404090Filter Wrench 4.5” O.D.For Removal of Filter Sumps (Hand Tighten Only)$8.90
252404040252404040Digital Handheld TDS MeterTo test system product water and vessel tank water TDS$35.50
252404121252404121John Guest Push to Connect Fittings KitFor spares and complex installations that require more fittings$320.00

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