ORIGINAL PLUMBING is a quarterly magazine independently published and distributed out of San Francisco 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)