NSF Product and Service Listings

These NSF Official Listings are current as of Thursday, January 2, 2025 at 12:15 a.m. Eastern Time. Please contact NSF to confirm the status of any Listing, report errors, or make suggestions.

Alert: NSF is concerned about fraudulent downloading and manipulation of website text. Always confirm this information by clicking on the below link for the most accurate information: http://info.nsf.org/Certified/PwsComponents/Listings.asp?Company=C0539109&Standard=061&


NSF/ANSI/CAN 61
Drinking Water System Components - Health Effects

NOTE: Unless otherwise indicated for Materials, Certification is only for the Water Contact Material shown in the Listing. Click here for a list of Abbreviations used in these Listings. Click here for the definitions of Water Contact Temperatures denoted in these Listings. Products certified to NSF/ANSI/CAN 61 comply with the health effects criteria in NSF/ANSI/CAN 600.

 
GEM Co., Ltd. 
61-20 Gagok-ro, Hwado-eup
Namyangju-si, Gyeonggi-Do 
12032 
Korea, Republic of 
82 31 559 0251
Visit this company's website


Facility : Gyeonggi-Do, Korea, Republic of

Joining and Sealing Materials

    Water Water
    Contact Contact
Trade Designation Size Temp Material

Gasket/Sealing Materials [G]
GDE 6311 [1] C. HOT EPDM
GDE 6311 [2] CLD 23 EPDM
GDE 7133 [1] C. HOT EPDM
GDE 7133 [2] CLD 23 EPDM 

[1] GDE 6311 and GDE 7133 compounds are molded into gaskets and o-ring seals. Certified for
    a maximum surface area to volume ratio of 10 square inches/L.
[2] GDE 6311 and GDE 7133 are molded into gaskets and o-ring seals. Certification requested
    for a maximum surface area to volume ratio of 21 square inches/L.
[G] Product is Certified to NSF/ANSI 372 and conforms with the lead content requirements for
    “lead free” plumbing as defined by California, Vermont, Maryland, and Louisiana state
    laws and the U.S. Safe Drinking Water Act.

O-Rings [G]
GDE 6311 [1] C. HOT EPDM
GDE 6311 [2] CLD 23 EPDM
GDE 7133 [1] C. HOT EPDM
GDE 7133 [2] CLD 23 EPDM 

[1] GDE 6311 and GDE 7133 compounds are molded into gaskets and o-ring seals. Certified for
    a maximum surface area to volume ratio of 10 square inches/L.
[2] GDE 6311 and GDE 7133 are molded into gaskets and o-ring seals. Certification requested
    for a maximum surface area to volume ratio of 21 square inches/L.
[G] Product is Certified to NSF/ANSI 372 and conforms with the lead content requirements for
    “lead free” plumbing as defined by California, Vermont, Maryland, and Louisiana state
    laws and the U.S. Safe Drinking Water Act.


Mechanical Devices

    Water Water
    Contact Contact
Trade Designation Size Temp Material

Diaphragms [G]
Membrane 50-3038 [1] C. HOT EPDM
Membrane 50-3038 [2] CLD 23 EPDM 

[1] Certified for a maximum surface area to volume ratio of 10 square inches/L.
[2] Certified for a maximum surface area to volume ratio of 21 square inches/L.
[G] Product is Certified to NSF/ANSI 372 and conforms with the lead content requirements for
    “lead free” plumbing as defined by California, Vermont, Maryland, and Louisiana state
    laws and the U.S. Safe Drinking Water Act.

Number of matching Manufacturers is 1
Number of matching Products is 10
Processing time was 1 seconds