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Question
I am designing a coffee shop in an existing space. The kitchen is going to have a 3 compartment sink, a mop sink and a hand sink. By theory I know that we need a ventilation pipe for the these fixtures, My question is: can I take the ventilation from the waste pipe? or I need to have individual ventilation for each fixture. The thing is that the plumbing fixtures are in a 2 hour rated wall and I do not want to touch this wall, so a nutshell my question would be How can you make the ventilation for a sink in an existing 2 hr rated wall without touch this wall?
Carlos,
Foremost - you should not open or penetrate the 2 hour wall. A penetration will destroy the rating. Next, check with your local building code and determine if a ventless stack installation can be used. Most codes require a re-vent when the fixture is beyond 5' from the main stack. There is a ventless stack that can be used when it is not convenient to tie into the main stack - such as your condition. A plumbing supplier should be able to give you the necessary parts for the installation. If the fixture is not installed against the 2 hr rated wall, you can install a 1 1/2" vent stack thru the roof. If you penetrate the roof be sure and provide good caulking and sealing around the pipe. If there are occupied spaces above your shop, you will have to use the ventless stacks.
Again, check with you local building dept. and/or a plumbing contractor or parts supplier.
I hope this was helpful.
Roger
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Answers by Expert:
Roger Zona
Expertise
I am experienced in all types of construction: residential, industrial and commercial; single family, multi-family, mid-rise and high rise buildings (16 story office building) as well as remodeling, additions and tenant improvements. I can field most any question that relates to general construction. I have consulted with infrastructure (utility) contractors also and have a good general knowledge of underground utility construction for subdivisions and commercial projects.
Experience
After college, I began my career in the construction industry. I chose to become an apprentice Architect and 4 yrs later I opened my own architectural design firm. Six years later I moved to Florida to buy & develop land and build. I became a State of Florida Certified General Contractor and operated my business for 45 years. I built all types of residential and commercial buildings including warehouses, shopping centers, high rise apartments and office buildings and developed sites for other contractors. I retired and became a consultant to the construction industry. I maintain my license and continuing education requirements, operate a small construction company and write a weekly newspaper column for the Palm Beach Post (a Cox publication) with the byline "Ask The Contractor". I am the "technical editor" for a publisher of books that relate to home maintenance.
Organizations
Previously - NAHA
Currently - FLCA (Florida Licensed Contractors Assoc.)
Publications
Palm Beach Post newspaper - weekly Q & A column
Happy Herald monthly real estate publication - monthly column
Education/Credentials
Michigan State University
University of Detroit
BS in Engineering
Past/Present Clients
I built a home in Palm Beach for a member of the Pulitzer Family.
I was responsible for the completion of a twin hi-rise condominium project for G.E. Credit.
I was a partner in the successful development of a P.U.D. (Planned Urban Development) subdivision.
I represented the largest home builder from France (Bati Service, S.A.) in the development of a subdivision and the design and construction of the homes.
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