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Technical FAQs

FAQs

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Everything you need to know about the product and how it works.

Residencial RO

  • Which filter set should I buy for my RO System?

    • To ensure that you get the right replacement filters for your system, it's important to start by checking the part number in your user manual. If you can't find the part number there, you can try typing your system model number into our search engine. Once you've found your system, you can scroll down to the Water Filters category to locate the correct replacement filters.
    • If you're unsure which system or filters you have, please refrain from calling our customer support phone line, as they may not be able to assist you over the phone. Instead, we recommend uploading a picture of your system. Click Here so that we can identify your pre and post-filters. However, please note that we may still need you to provide the membrane size by pulling it out and sending us the label number.
    • This will help us ensure that you receive the correct replacement filters for your system.

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    • Aquarium RO

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    • Whole House System

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    • Installing the system immediately with all 3 Filters loaded in will cause the CTO / 3rd Stage filter to be covered with iron fines, so when handling Iron Manganese systems, pre-preparation for the system is very important. (Note that only our 10"x 2.5" Iron Manganese Filter can function as part of a 1-stage system)
    • For the first time use of the filters, load the sediment filter into the 1st stage housing (right), and load the iron-manganese filter in the 2nd stage housing (middle). Leave the CTO Filter out and leave the 3rd stage housing (left) empty. Connect the system to your house and open the mainline, opening the nearest faucet to flush out the residue of red finery, and leave it running for as long as the red color in the water remains. Once the water coming out of the faucet is clear without a reddish color, your System is ready for the CTO Filter to be installed into the 3rd Stage Filter Housing. Stop the mainline, install the CTO Filter, and open the mainline again.
    • We ( Max Water ) are not responsible for any failure of damage that occurred to any type of replacement filters, for more detail please Click Here

    • This may be a compatibility issue between your Filter(s) and the Filter Housing Head(s) of your system, which can be for many reasons. The filter housing head is meant to sit on the filter, and there is a hole in the center of the Filter Housing Head that allows water exiting the filter to pass through.

      The standard Filter Housing Head has a Hole with a SHORT stem, but other manufacturers can also supply Filter Housing Heads that have a Hole with a LONG stem.

      Some Filters have an opening at the top that keeps the center and sides of the hole completely exposed. Other Filters will have the center of its hole covered, with small openings on the sides of the hole.

    • One reason for the pressure drop is if by chance you have a Filter Housing Head with a LONG hole stem, and combine that with a Filter that has a covered center hole, the LONG stem's Hole will be completely covered by the Filter's hole covering. This is the main source of pressure drop and flow restriction. There is no opening for the water to flow. One Possible Solution (perform at your own discretion) is drilling 1-2 small holes into the sides of the LONG stem hole, which permits the water coming from the sides of the Filter's hole to flow through the sides of the Head's LONG stem, allowing for proper water flow and barely any pressure drop.
    • A second reason could be if the system's filters were placed in the wrong order, which can cause serious problems. A Sediment Filter will always be the first stage in any system because it can catch the larger sediment particles while it lets the 2nd stage filter and onwards only deal with the microscopic particles. If for instance, a GAC or Iron Filter was placed as the first stage in a system, the larger particles in the unfiltered water cannot be dealt with by these filters' extremely thin sediment membrane, causing the filter to quickly become clogged, and the pressure to drop rapidly. The sediment filter must always come first in multi-stage systems to protect your other filters and the rest of your system from getting clogged and potentially damaged.
    • We ( Max Water ) are not responsible for any failure of damage that occurred to any type of replacement filters, for more detail please Click Here

    • Replacement Filter

    • For 5 stage full replacement filters, please follow part number 104550.
    • You can just buy the 3 pre-filters and the last stage polishing filter 104504.
    • Other options for 75, and 100 GPD systems, buy 3 pre-filters and last stage polishing filter 104504 so and any of the following membranes.
    • Some examples of Max Water 50 GPD Reverse osmosis Systems.

      Please use part number 104550 for following Max Water Filter Models 101001, 101002, 101003, 101004, 101006, 101007, 101009, 101017, 101018, 101023, 101025, 101032, 101044, 101045, 101110, 101111, 101112, 101122, 101126, 101128, 101124, 101309.

    • For 50 GPD systems, select 104550 plus the following filer(s): But For 75 to 200 GPD systems; go back to Q.2 and purchase your pre-filters and membrane separately.
    • For 6-Stage alkaline RO system part #101073 or part #101074, select 104550 Plus add filter 104051
    • For 6-Stage mineral RO system part #101076, select 104550 Plus add filter 104042
    • For 6-Stage infrared RO system, select 104550 Plus add filter 104044
    • For 6-Stage UV RO system with Stainless Steel Housing, select 104550 Plus add a 105027 UV bulb, for older models, search 105037 or 105024

      Note: Always check your UV bulb model in your system before purchasing.

    • For 7-Stage Mineral with UV Stainless Steel Housing Light, select 104550 Plus add filter 104042 Plus 105027 UV bulb, for older models, search 105037 or 105024

      Note: Always check your UV bulb model in your system before purchasing.

    • For 8-Stage Alkaline Mineral Infrared system part #101080, select 104550 Plus add 3-1 Alkaline filter 104180 or 104052

    • For 9-Stage Alkaline Mineral Infrared DI, select 104550 Plus add filter 104180 or 104052 Plus 104050
    • For 9-Stage Alkaline Mineral Infrared with UV Stainless Steel Housing Light System, part # 101086, Or 101038 select 104550 Plus add filter 104180 or 104052 Plus 105027 UV bulb, for older models, search 105037 or 105024

      Note: Always check your UV bulb model in your system before purchasing.

    • For 10-Stage Alkaline System with 5-1 filter system part #101190, the 50 GPD system pre and post-filters 104550 Plus add 5-1 Alkaline filter 104185
    • For 10-Stage Alkaline Mineral Infrared DI with Stainless Steel UV Housing Light System, part # 101089, select 104550 Plus add filter 104180 or 104052 Plus 104050 Plus 105027 UV bulb, for older models, search 105037 or 105024
    • For 10-Stage Alkaline Mineral Infrared DI with PVC Casing UV Light System, part #101088, select 104550 Plus add filter 104180 or 104052 Plus 104050 Plus 105027 UV bulb, for older models, search 105037 or 105024

      Note: Always check your UV bulb model in your system before purchasing.

    • For 11-Stage Alkaline 5-1 plus DI System, select 104550 Plus add filter 104185 Plus 104050
    • For 11-Stage Alkaline 5-1 with Stainless Steel Housing Light System, select 104550 Plus add filter 104185 Plus 105027 UV bulb, for older models, search 105037 or 105024

      Note: Always check your UV bulb model in your system before purchasing.

    • For 12-Stage Alkaline 5-1 DI with Stainless Steel Housing Light System, select 104550 Plus add filter 104185 Plus 104050 Plus 105027 UV bulb, for older models, search 105037 or 105024

      Note: Always check your UV bulb model in your system before purchasing.

    • Please note that we do have two types of quick-connect filter replacement, old type, and new type. Please compare your system and filters carefully before buying.

    • For the 1st Stage 5 micron Sediment, select filter 104061
    • For the 2nd Stage GAC Carbon filter, select filter 104062
    • For the 3rd Stage, either CTO Carbon filter 104063 or 5 Micron Sediment Filter 104061(For high chlorine in the water choose CTO. For well water with high sediment, choose 5 Micron).
    • For the 4th Stage membrane, select 104092 (if your membrane is 50 GPD, otherwise go back to Q.2 and select your right membrane size)
    • For the 5th Stage polishing filter, select 104041
    • For the 8-Stage Alkaline Mineral Infrared add all the 5 above plus add either filter 104180 or 104052, some new systems are supplied with connecting filter part number 104184

    • For 5 stage full replacement filters, select 104505 and membrane 104092
    • Some examples of Max Water 50 GPD Reverse osmosis Systems

      • Max Water - Filters For Model - 101008 use part number 104505

      Max Water - Filters For Model - 101058 use part number 104505

    • For 4 stage - The first three pre-filters 104515 plus 1 Membrane if 50 GPD 104092, if its 75 GPD 104093, and for 100 GPD 104094
    • For 5 stage - The first three pre-filters 104515 + 1 Membrane ( any of the above 50, 75, or 100 GPD) + Deionization filter 104045 or for the refillable type you can select 104050, or 104050A or just buy DI media Bag for Aquarium 104138-2 or for drinking 104135-2 to refill your refillable filters
    • For 6 stage - same 5th stage filter just either add another Deionization filter (repeat stage 5) 104045, 104050, 104050A or refill media Aquarium 104138-2 or for drinking 104135-2 or add a Carbon filter for some other system if carbon is required 104041 like the Dual systems (Drinking + Aquarium)

    • For 2 stage (Sediment 5 Micron + CTO Carbon Block), select items 104002 and 104005
    • For 2 stage (Sediment 5 Micron + GAC Carbon Block), select items 104002 and 104004
    • For 3 stage (Sediment 5 Micron + GAC Carbon + CTO Carbon Block), select item 104516
    • For 3 stage (Pleated 5 Micron + Sediment 5 Micron + GAC Carbon), select item 104513
    • For 3 stage (Sediment 5 Micron + Iron Manganese + CTO Carbon Block), select items 104002 plus 104321 and 104005
    • For 3 stage (Sediment 5 Micron + Cation Resin + GAC Carbon), select items 104002 plus 104022 and 104004

      • You can find other filter combinations on the following link 10" X 2.5" Water Filters

    • For 2 stage (Sediment 5 Micron + CTO Carbon Block), select items 104102 and 104104
    • For 2 stage (Sediment 5 Micron + GAC Carbon Block), select items 104102 and 104103
    • For 3 stage (Pleated 5 Micron + Sediment 5 Micron + GAC Carbon), select item 104595

      • You can find other filter combinations on the following link 10" X 4.5" Water Filters

    • For 2 stage (Sediment 5 Micron + CTO Carbon Block), select item 104586
    • For 2 stage (Sediment 5 Micron + GAC Carbon Block), select item 104580
    • For 3 stage (Sediment 5 Micron + GAC Carbon + CTO Carbon Block), select item 104592
    • For 3 stage (Pleated 5 Micron + Sediment 5 Micron + GAC Carbon), select item 104590
    • For 3 stage (Sediment 5 Micron + Iron Manganese + CTO Carbon Block), select items 104112 plus 104121 and 104114

      • You can find other filter combinations on the following link 20" X 4.5" Water Filters

Note:

Please note that the mentioned FAQs number is subject to variation