{"id":18104,"date":"2026-10-14T12:54:29","date_gmt":"2026-10-14T12:54:29","guid":{"rendered":"https:\/\/drakemarine.com\/product\/spot-zero-ztc-ii-water-purifier\/"},"modified":"2026-10-15T02:51:19","modified_gmt":"2026-10-15T02:51:19","slug":"spot-zero-ztc-ii-water-purifier","status":"publish","type":"product","link":"https:\/\/drakemarine.com\/th\/product\/spot-zero-ztc-ii-water-purifier\/","title":{"rendered":"Spot Zero ZTC II Double Pass Water Purifier \u2014 1,000 \/ 2,000 \/ 3,000 GPD"},"content":{"rendered":"

\u0e40\u0e14\u0e2d\u0e30 Spot Zero ZTC II<\/strong> is the built-in water purifier that the spot-free idea was built around. Fed from the dock or from the boat’s own watermaker, it runs the water through two full reverse-osmosis passes and delivers it at about 10 ppm total dissolved solids \u2014 water so clean it dries without leaving anything behind. The boat is rinsed and walked away from; the galley, showers and ice-maker run on bottled-quality water; and stainless, glass and dark gelcoat stop collecting mineral scale.<\/p>\n

It is a purifier, not a softener. A softener swaps calcium and magnesium for sodium and the water still spots. The ZTC II removes the dissolved solids \u2014 Spot Zero quotes 95\u201399 % removal \u2014 and recovers up to 66 % of the feed water.<\/p>\n

\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e08\u0e33\u0e40\u0e1e\u0e32\u0e30<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0e04\u0e27\u0e32\u0e21\u0e08\u0e38<\/th>\n1,000 \/ 2,000 \/ 3,000 US gal per day (3,785 \/ 7,570 \/ 11,356 L per day); up to 125 gal\/h (473 L\/h). Upgradable to 3,000 GPD<\/td>\n<\/tr>\n
Feed water<\/th>\nDock water, or the output of a seawater watermaker<\/td>\n<\/tr>\n
\u0e1c\u0e25\u0e25\u0e31\u0e1e\u0e18\u0e4c<\/th>\nAbout 10 ppm TDS or less; 95\u201399 % of dissolved solids removed<\/td>\n<\/tr>\n
Recovery<\/th>\nUp to 66 % of feed water; recycles 2 gal\/min<\/td>\n<\/tr>\n
\u0e1e\u0e25\u0e31\u0e07<\/th>\n230 V 60 Hz, 5 A; 220 V 50 Hz, 5 A<\/td>\n<\/tr>\n
Membranes<\/th>\nUltra-low-energy freshwater RO membranes in fibreglass vessels<\/td>\n<\/tr>\n
Pre-filtration<\/th>\nClear commercial pre-filter housings; bacteriostatic re-mineraliser on the product side<\/td>\n<\/tr>\n
\u0e01\u0e32\u0e23\u0e04\u0e27\u0e1a\u0e04\u0e38\u0e21<\/th>\n7-inch NEMA 4X colour touchscreen; automatic programmable freshwater flush; mechanical override; digital TDS reading; tank-switch input<\/td>\n<\/tr>\n
Integration<\/th>\nNMEA 2000 compatible; remote monitoring from phone, tablet or computer; optional second 7-inch remote touchscreen<\/td>\n<\/tr>\n
\u0e01\u0e32\u0e23\u0e01\u0e48\u0e2d\u0e2a\u0e23\u0e49\u0e32\u0e07<\/th>\n316L stainless flow and pressure components; TEFC motor with thermal protection; vibration isolation<\/td>\n<\/tr>\n
Boat size<\/th>\n50\u2013120 ft and larger, per Spot Zero<\/td>\n<\/tr>\n
\u0e01\u0e32\u0e23\u0e23\u0e31\u0e1a\u0e1b\u0e23\u0e30\u0e01\u0e31\u0e19<\/th>\n12 months or 1,000 hours, parts and labour; Gold \/ Platinum \/ Diamond extensions available<\/td>\n<\/tr>\n
\u0e1c\u0e25\u0e34\u0e15\u0e43\u0e19<\/th>\nUSA<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Capacities, configurations and factory part numbers<\/h3>\n\n\n\n\n\n\n\n
\u0e42\u0e21\u0e40\u0e14\u0e25<\/th>\nPer hour<\/th>\nPer day<\/th>\nMembrane mounting<\/th>\nFactory P\/N 115 V<\/th>\nFactory P\/N 230 V<\/th>\n<\/tr>\n<\/thead>\n
ZTC II 1000<\/td>\n42 gal \/ 158 L<\/td>\n1,000 gal \/ 3,785 L<\/td>\nShort vessel (26 in)<\/td>\non request<\/td>\non request<\/td>\n<\/tr>\n
ZTC II 2000<\/td>\n83 gal \/ 314 L<\/td>\n2,000 gal \/ 7,570 L<\/td>\nLocally mounted on the unit, or remote<\/td>\n9610001284<\/td>\n9610001169<\/td>\n<\/tr>\n
ZTC II 3000<\/td>\n125 gal \/ 473 L<\/td>\n3,000 gal \/ 11,356 L<\/td>\nRemote mount only (two vessels)<\/td>\n9610002708<\/td>\n9610002709<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Spot Zero positions the ZTC II as its “Dayboater” package: dock water or watermaker output in, pure water out, with Bluelink connectivity, the patented double pass (which eliminates pump cycling and TDS creep) and auto-sensing activation that detects flow from the dock or the watermaker.<\/p>\n

\u0e17\u0e32\u0e07\u0e44\u0e1f\u0e1f\u0e49\u0e32<\/h3>\n\n\n\n\n\n\n
\u0e2d\u0e38\u0e1b\u0e17\u0e32\u0e19<\/th>\nMax draw<\/th>\n\u0e04\u0e27\u0e32\u0e21\u0e16\u0e35\u0e48<\/th>\nPhase<\/th>\n<\/tr>\n<\/thead>\n
115 V<\/td>\n10.0 A<\/td>\n50 \/ 60 Hz<\/td>\n\u0e0a\u0e34\u0e49\u0e19\u0e40\u0e14\u0e35\u0e22\u0e27<\/td>\n<\/tr>\n
230 V<\/td>\n5.0 A<\/td>\n50 \/ 60 Hz<\/td>\n\u0e0a\u0e34\u0e49\u0e19\u0e40\u0e14\u0e35\u0e22\u0e27<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Spot Zero notes that production capacity can be affected at 50 Hz: the pump motor turns slightly slower on a 50 Hz supply, so a system installed for Thailand is sized with that in mind. Tell us the daily water need and we will specify the capacity that delivers it on 50 Hz.<\/p>\n

Dimensions and weights (Spot Zero drawings)<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n
Control unit<\/th>\n569 mm L \u00d7 311 mm H \u00d7 325 mm D (22.4 \u00d7 12.2 \u00d7 12.8 in); 35 kg (77 lb)<\/td>\n<\/tr>\n
ZTC II 2000, locally mounted<\/th>\nVessel through the unit: 1,178 mm (46.4 in) overall length \u00d7 311 mm high<\/td>\n<\/tr>\n
ZTC II 2000, remote mounted<\/th>\nLong membrane vessel 1,216 mm L \u00d7 150 mm dia \u00d7 231 mm with brackets (47.9 \u00d7 5.9 \u00d7 9.1 in)<\/td>\n<\/tr>\n
ZTC II 3000, remote only<\/th>\nTwo long vessels in a rack 1,216 mm L \u00d7 419 mm H (47.9 \u00d7 16.5 in), bracket depth 150 mm<\/td>\n<\/tr>\n
Short membrane vessel (custom fit)<\/th>\n660 mm L \u00d7 150 mm dia \u00d7 419 mm (26 \u00d7 5.9 \u00d7 16.5 in)<\/td>\n<\/tr>\n
Commercial pre-filter, 4.5 \u00d7 20 in housing (standard)<\/th>\n291 mm W \u00d7 197 mm D \u00d7 598 mm H (11.4 \u00d7 7.8 \u00d7 23.5 in)<\/td>\n<\/tr>\n
Short pre-filter, twin 4.5 \u00d7 10 in (option)<\/th>\n375 mm W \u00d7 197 mm D \u00d7 315 mm H (14.8 \u00d7 7.8 \u00d7 12.4 in) \u2014 no upcharge if specified when ordering<\/td>\n<\/tr>\n
Bacteriostatic remineraliser, 2.5 \u00d7 10 in (standard)<\/th>\n160 mm \u00d7 125 mm head, 316 mm high (6.3 \u00d7 4.9 \u00d7 12.5 in)<\/td>\n<\/tr>\n
Remote 7-inch touchscreen (option, P\/N 252404181)<\/th>\n230 mm \u00d7 134 mm \u00d7 39 mm, 29 mm behind the panel (9.1 \u00d7 5.3 \u00d7 1.5 in)<\/td>\n<\/tr>\n
Wall-mount bracket (option)<\/th>\n598 mm \u00d7 314 mm \u00d7 274 mm (23.6 \u00d7 12.4 \u00d7 10.8 in)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Spot Zero also publishes the configurations as a sheet and a workbook with the flow and wiring drawings (links below); we send the CAD with the quote.<\/p>\n

Installation, plumbing and wiring<\/h3>\n

From Spot Zero’s one-line flow drawing: the dock feed comes in through 3\/4 in ID tubing to the pre-filter (Spot Zero P\/N 252404301); the feed from pre-filtration, the feed from the desalinator, the membrane supply and return and the overboard line are 1\/2 in OD; the membrane product and the product-to-tank lines are 3\/8 in OD. The concentrate discharge runs to an open overboard in a free and unrestricted manner, and Spot Zero recommends a pressure-relief valve set at 8 psi in the feed-from-desalinator line. The ship supplies the dock-water inlet and the run from the bacteriostatic remineraliser (Spot Zero P\/N 252404141) to the fresh-water tank. The control board runs the backpressure regulator, product, concentrate and inlet-source valves and reads product TDS, pump and concentrate pressure, product, recycle and concentrate flow and a tank-level sensor; the touch panel and optional remote touch panel are on 24 V DC, and an NMEA 2000 bus connection is provided. A link to an XTC II watermaker is wired on the same board.<\/p>\n

Standard and optional equipment<\/h3>\n

Standard:<\/strong> control unit, membrane vessel(s), commercial pre-filter 4.5 \u00d7 20 in with clear housing, bacteriostatic remineraliser and pH neutraliser 2.5 \u00d7 10 in, 7-inch touchscreen.
Optional:<\/strong> remote-mount 7-inch touchscreen (P\/N 252404181), short pre-filter (twin 4.5 \u00d7 10 in, no upcharge if specified at order), short membrane vessel, wall-mount bracket.<\/p>\n

Service parts for this system<\/h3>\n

All of these are listed in our Spot Zero parts section<\/a> at Spot Zero’s US list price, special order from the factory with the lead time confirmed before you pay; tell us the model and serial number and we will confirm the exact membrane size and count for your configuration.<\/p>\n

Pre-filtration<\/strong><\/p>\n