Reverse Osmosis System Filters, RO Membranes and Parts

Water Doctors SMP-3000 5 Stage RO Reverse Osmosis System

Water Doctors SMP-3000 5 Stage RO Reverse Osmosis System

Water Doctors SMP-3000 5 Stage RO Reverse Osmosis Drinking Water System

Replacement water filters, RO reverse osmosis membranes and service parts to keep your Water Doctors SMP-3000 in top performance.  Everything you need for DIY - Do It Yourself sevice on your SMP-3000 reverse osmosis drinking water system.

 5 STAGES:

STAGE 1 (vertical) - 5 Micron Sediment Pre Filter - Replace Every 3-6 Months

STAGE 2 (vertical) - 10 Micron Carbon Block Pre Filter - Replace Every 12 Months

STAGE 3 (vertical) - 10 Micron Carbon Block Pre Filter - Replace Every 12 Months

STAGE 4 (horizontal) - Reverse Osmosis Membrane: Choose a membrane and matching flow restrictor below.  Replace when indicated by testing TDS (total dissolved solids)

STAGE 5 (horizontal) -  GAC Inline Post Filter (granular activated carbon) - Replace Every 12 Months


 

See Typical 5 Stage RO Installation Diagram

John Guest Quick Fittings and Connector Instructions

Water Filter Connector Size Selection Guide

Water Filter Installation Guide

Water Filter Change Guide

Learn how to test your reverse osmosis membrane. Is it time for a replacement?

  1. Pentek SW-1A # 150539 SW1 Slim Line Water Filter Housing Spanner Wrench
    Pentek SW-1A # 150539 SW1 Slim Line Water Filter Housing Spanner Wrench
    Pentek SW-1A # 150539 SW1 Slim Line Water Filter Housing Spanner Wrench. Compatible With Culligan, Ametek, US Filter, Plymouth, Kleen Plus, American Plumber, Bruner & Many Other Brands. SW-1 Water Filter Housing Wrench. Fits 4" Slim Line Housings. (Slim Line Housings Have A 3 1/2" diameter "O" Ring) Ametek # 150294. Only for use in loosening filter housings, never to tighten. Overtightening may cause damage to the O-rings and make re-opening VERY difficult. Hand tighten only. Fits most standard style RO systems. Replaces 150294. For really stubborn filter housings our technicians will use two wrenches together for maximum power where one wrench might break or not do the job. Place the handles of two wrenches pointing in opposite directions and it will apply force evenly. Our techs know the tricks.
    Learn More
    $9.99 Special Price $6.99 As low as $4.99
  2. Pro Products Sani System RO & Water Filtration System Sanitizer
    Pro Products Sani System RO & Water Filtration System Sanitizer
    Sani-System ® Pro Products is proud to introduce Sani-System, the first and only EPA product approved for sanitizing water softeners, RO units and Water Coolers. Alos NSF certified. Sani System is proven to kill 99.9% of E. coli, E. coli O157:H7, Staphylococcus aureus, Listeria monocytogenes and other harmful bacteria. It does not use chlorine, other oxidizers or acids that can harm water softener equipment parts. Use is simple; each dose comes in a pre-measured pouch. Just cut, pour and regenerate softener. No measuring, No mess! Sanitizing Equipment! Applications Interior Surfaces of Water Softeners, Reverse Osmosis (RO) Units, Ice Machines, Water Coolers, Water Holding Tanks and Pressure Tanks. Pro Products Sani System Sanitizer. 0.25 fl. oz. concentrate is perfect for your RO reverse osmosis drinking water system sanitizing..
    Learn More
    $7.99 Special Price $4.99 As low as $2.99
  3. Molykote-From DOw Corning- 111 Compound-6 Gram O-ring Silicone Lubricant & Sealant-Dow-111-5-gram-1000
    Dow Corning - Molykote ® 111 6 gram O-ring Silicone Lubricant and Sealant - Be sure to lube your O-rings to help prevent leaks.
    Dow Corning/ Molykote ® 111 6 gram O-ring Silicone Lubricant and Sealant - 6 gram pillow pack. (like a ketchup packet) Great O-ring sealant and lubricant. FDA and NSF approved. (Do Not Use Petroleum Jelly As It May Break Down O-rings Or Housings) This is the same premium grade silicone sealant and lubricant used in underwater photography cameras, scuba gear and other underwater applications that simply can't afford leaks. Why not use the best for your reverse osmosis or drinking water filtration system?
    Learn More
    $5.99 Special Price $3.99 As low as $1.79
  4. Air Pressure Gauge for Reverse Osmosis Water Accumulator Tanks -1000
    Air pressure gauge for reverse osmosis water accumulator tanks
    Air pressure gauge for reverse osmosis water accumulator tanks - Specially calibrated for reverse osmosis system tanks. Scale from 1 to 20 PSI. Large scale reading over small PSI range allows optimum accuracy. Just like car tires lose air pressure, so does the bladder of your reverse osmosis water accumulator tank. Improper tank air pressure will cause your system to operate improperly. This is a must for all reverse osmosis system owners.
    Learn More
    $24.99 Special Price $17.99 As low as $12.99
  5. TDS Meter Inline Water Tester DM1 - HM Digital Dual Mode Reading
    TDS Meter Inline Water Tester DM1 - HM Digital Dual Mode Reading - Easily Installs Inline Very Simple To Use
    TDS Water Meter - HM Digital DM1 - Dual Mode - Installs Inline - Check the TDS level with the push of a button. Now you can easily check to make sure the water from your reverse osmosis system is top quality. Measure the tap water coming in vs. the purified water going out of your system at any time. Very easy installation. Highly efficient and accurate due to its advanced microprocessor technology. Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use. Dual Range 0-9990 ppm. Always know if your RO membrane is performing correctly!
    Learn More
    $49.99 Special Price $39.99 As low as $19.99
  6. Chiller Daddy CHL-750XL Under Sink Water Chiller - 110 Volt
    Chiller Daddy CHL-750XL Under Sink Water Chiller - 110 Volt

    110 Volt Chiller Daddy ® CHL-750XL Under Sink Water Chiller -  NEW TANK IS 25% LARGER than our previous chillers.  Output Cold Tank Volume : 3 liter (0.8 gallon) Exterior cabinet is made of RUST FREE 304 SS Stainless Steel. Cold Water Container is made of SUS304 Stainless Steel. Inlets and outlets are 1/4" stainless steel 304. Includes a pair of quick connectors for a simple hook up. Output of Cold Water : 1.75 Gallons Per Hour (6.6 Liters 5L/H (<10C) Continuous Cold Water Output(cc/hr). This is a high output, heavy duty undersink drinking water chiller. Great for use with a Reverse Osmosis System or drinking water filter system.

    Learn More
    $499.99 Special Price $395.00 As low as $354.00
Easy TDS Membrane Performance Calculator
See If It is Time To Replace Your Membrane

Simply enter your Feed Water TDS and RO Water TDS into the boxes above and click "Submit". The percentage of TDS Rejection will be displayed. We normally recommend membrane replacement once you drop below 75%. This may vary in areas with high TDS in the feed water.

See our selection of TDS meters under Water Tests


Be sure to check our Parts Department for important replacement parts for your Water Doctors SMP-3000 Reverse Osmosis System such as TDS Testers For Reverse Osmosis Membranes, Replacement Tanks, O-rings, Faucets, Pumps, Fittings, UV Systems and more service parts for your reverse osmosis pure water filter system.   View maintenance and servicing tips for Water Doctors drinking water filter system online at our Installation & Trouble Shooting Guide.

* Water Doctors ® is the registered trademark of HMI Water Specialists, Minneapolis, MN USA, the manufacturer of Water Doctors brand drinking water filtration equipment.  The replacement water filters and reverse osmosis membranes listed above are not manufactured or endorsed by HMI Water Specialists.  Rather, these replacement filters and RO membranes are manufactured by other companies.  While these filters and membranes are compatible for use in Water Doctors SMP-3000 reverse osmosis water filtration equipment, we make no representation as to whether using these water filters and RO membranes is consistent with the warranty and specifications applicable to Water Doctors equipment.