FAQ - Technical

What are the Port Sizes / Connection Sizes of the FC Humidifiers?

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The FC Series Humidifiers have different port sizes, depending on their size. Those sizes are shown below in the table: “FNPT” Denotes Female National Pipe Thread, which are US-Standard conical threads.  We do not recommend using Telflon tape and/or metal fittings to connect with these humidifiers – unless you order the stainless steel versions of the FC 100 and FC 150, which are the only sizes available in stainless steel.

Series # Tubes Standard Ports
FC100 80 1/4″ FNPT
FC125 240 1/2″ FNPT
FC150 480 3/4″ FNPT
FC200 780 1″ FNPT
FC300 1660 1-1/2″ FNPT
FC400 2500 2″ FNPT
FC600 7000 2″ FNPT

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