1- Why should Fire hose to be connected before zone control valve and not after the zone?
2- Is it acceptable by the code to install one set of firefighting pumps for more than one building with one riser for each building?
1) Firefighters sometimes shut down the sprinkler system to improve visibility when combating fires. If the hose connections are after the zone control valve, then they wont be able to use them. Also, from a design perspective, having the hose connection after the zone control valve requires calculating the sprinkler demand plus the inside hose allowance.
2) It is acceptable to have one fire pump for an entire facility. There can be one sprinkler riser per building as long as it complies with NFPA 13 section 8.2.
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