SZ HD Series Water Purifier

Commercial-grade purification.

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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.

Production Capacities 4000, 5000, 6000 GPD

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Designed to work with a watermaker.

Up to
6,000 GPD

Gallons Per Day

Up to
250 GPH

Gallons Per Hour

Up to
60 HZ / 230V / 8.2 AMPS

50 HZ/ 220V / 7 AMPS


Works 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.

Removes 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.

Spot-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.

Vessels 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.

Recover 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.

Simple & 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.

Key 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.

SZ HD Series Specs

Download Full Spec Sheet
Marine Watermaker Fort Lauderdale Florida - spot zero water maker dometic

Contact Spot Zero Watermakers & Water Purifiers to determine which Reverse Osmosis system is right for you.

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