Is there any reason that you cannot put a pressure reducing valve before a reduced pressure backflow on an incoming fire service? I can't seem to find anything that says you can't.
I have a project that has been completed recently and I'm told there has been water in the mechanical room. Specifics were not given but I'm 99% sure it's from the relief vent on the reduced pressure backflow. The contractor was on site, did some investigating and determined that they need to...
I can't seem to find the answer to this. Does the use of Novec 1230 require exhaust? My understanding is that inergen does not, FM200 does but all I can seem to find on Novec 1240 is that is has no impact on environment.
Is there a code that states you cannot run water piping (Domestic or Fire) below a new building slab? I have a unique project where at the last minute, the city decided to change where the service could connect to the city main and it basically forced a design to run below the slab for about 50...
I have a project where a flow test was done. The test hydrant was located on a "Street A" nearest the to the incoming service to the building and the flow hydrant was on "Street B" which runs perpendicular to "Street A".
At the end of the project, the incoming service needed to flip. It went...
I have a project with an Internal Stair (non-egress). It goes from the 1st to 2nd floor. The risers/treads are the only solid surface, it will be open to a water feature below the stair so there is a non-walkable space below the stair. What are the requirements for this? Are sprinklers required...
NFPA 13 states you cannot run Fire Service mains below a building unless precautions are taken. I'm a bit confused at this.
I have a situation where the only water supply is on the opposite side of the building and the only way to get the service into the water service entrance room is from...
This is more of a hydra-calc question but I would also like to hear general answers.
We frequently do high-rise tenant fitup projects and one question came up which I've heard multiple answers to.
There are two standpipes. The floor is looped with a PRV at each outlet from the S.P. The PRV is...
I have a silly questions that has been bugging me.
In situations where there is a 24" wide column located against a wall. Do you still need to follow the 3 times rule. I'm a little confused about the comment that states "The maximum clear distance required shall be 24"
I'm not sure if no...
Is it possible to put an pendent under and off to the side of a large duct? I would be putting an upright at a higher elevation, dropping the deflector of the pendent just below the bottom of the duct and providing a water shield.
I've done similar things in the past without issues but I'm not...
If two combination standpipes were interconnected, but there was one floor control valve, that would still mean the floor was supplied by two or more combination risers. Correct?
I'm a little confused at a code that states a high rise shall be served from two or more combination...
