ORIGINAL PLUMBING is a quarterly magazine independently published and distributed out of San Francisco, California. U.S.A. by Amos Mac and Rocco Kayiatos.
Often referred to as "OP" by fans, ORIGINAL PLUMBING is a zine dedicated to documenting the lifestyle and sexuality within FTM trans male culture through photographic portraits, interviews, personal narratives and fictional stories by trans men.
- No. 1, The Bedroom Issue (Fall 2009)
- No. 2, The Hair Issue (Winter 2010)
- No. 3, The Health and Safer Sex Issue (Spring 2010)
- No. 4, The Workin' Stiff Issue (Summer 2010)
- No. 5, The Fashion Issue
- No. 6, The Schooled Issue
- No. 7, The Green Issue
- No. 8, The Family Issue
- No. 9, The Entertainment Issue (2012)
- No. 10, The Jock Issue (2012)
- No. 11, The Hero Issue (double issue, 2013)
- No. 12, The Party Issue (2013)