[1] Certified for use in water treatment plant or distribution systems with inlet sizes of
    greater than one inch diameter and where flow exceeds 3 gallons/minute.
    
    M  designates the Micron Rating. 
    HF designates non-cellulose media.
[2] Certified for use in treatment plants or distribution systems with inlet sizes of
    greater than one inch diameter and where flow rate exceeds four gallons per minute.
    Big-Blue is a registered trademark of Plymouth Products, Inc. 
    
    Trade names may contain the following designations: 
    M  - micron rating 
    L  - length of cartridge 
    HT - high temperature cartridges 
    HF – non-cellulose media 
    W  - optional shrink wrapping
[3] Big-Blue is a registered trademark of Plymouth Products, Inc.

[4] Certified for Harmsco® HIF Up-Flow Filter models: HIF-42, HIF-75, HIF-100, HIF-150-FL
    and HIF-200-FL.  Certified for use in a water treatment facility or distribution systems
    with inlet sizes of greater than one-inch diameter and where flow exceeds 3
    gallons/minute.
[5] Approved Harmsco® Hurricane™ Filter Housings are HUR-40-HP, HUR-90-HP and HUR-170-HP. 
    Approved Harmsco® HIF Up-Flow Filters are HIF-7, HIF-14, HIF-16, HIF-21 and HIF-24. 
    Approved Harmsco® Waterbetter™ Filters are WB40SC-2, WB90SC-2 and WB170SC-2.  Evaluated
    for use in a water treatment facility or distribution systems with inlet sizes of
    greater than one-inch diameter and where flow exceeds 3 gallons/minute.  Trade names
    refer to the housing only. Approved filter elements include HC/170-M or EZ-CLEAN by
    Harmsco, or other NSF/ANSI Standard 61 Certified cartridges meeting the size and minimum
    flow requirements.
[6] Certification is for use in a water treament facility or distribution system with inlet
    sizes greater than 1" diameter and with a minimum flow of 3 gallons/minute (16,000
    liters/day).
    Trade names refer to the housing only. Approved filter elements include HC/170-M or
    EZ-CLEAN by Harmsco, or other NSF/ANSI Standard 61 Certified cartridges meeting the size
    and minimum flow requirements. These housings are not intended for use with cartridges
    above the Listed water contact temperature.
[G] Product also Certified to NSF/ANSI 61, Annex G and is in compliance with California's 
    Health & Safety Code Section 116875 (commonly known as AB1953) and Vermont Act 193.
    Weighted average lead content <=0.25%; Solder and flux lead content <=0.2%.