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I am having a bit of discussion with my co workers about installing a 1/2" pressure relief valve on the jockey pump discharge piping. The Jockey pump churn plus the static pressure from the city water supply equals 125 psi. I see no reason for one. Others say we need it and it must be...

The owners mechanical engineer made a comment on my drawings that I needed dry pendents on my antifreeze system in lieu of standard pendents. This is a small antifreeze system above a ventilated metal ceiling covering a loading dock. The pendents are on return bends for adjustment purposes...

Just got back from a meeting on the site with the Fire Marshal. Unless the General Contractor can get approval from the Building Inspector to delete the sprinkler requirement by increasing the hour rating of the walls and ceiling, we have to put the sprinklers in. If the Building inspector...

I would write it up as a deficiency to make sure you are covered from a liability standpoint. Just a thought....... Maybe the structure is "Historical" and has been exempted. I have done two Government projects that had areas where the sprinkler protection wasn't per code because of structural...

OK, Did some more leg work. The General contractor installed a "40,000 underground fire suppression water storage tank". I have the feeling this is for fire dept. use, not sprinklers, as there is no pump attached to it. The reason the sprinklers are required, is that the the storage rooms are...

The Fire Marshal stated "we will not accept a well". I figured as much, just needed to confirm. A quick calc yields an 83 GPM flow requirement. I guess I will need an 8,000 gallon underground storage tank and some type of pump.

Here is what got dumped into my lap. A convenience store wants to install 4 sprinklers, 1 for the domestic water room, one for a trash room, one for two separate storage rooms. This particular store is supplied by a well. I am getting information on the well pump now, but I am sure it does not...

Thanks Travis

I can't seem to find anywhere in the code book regarding the requirement of hose allowance for an NFPA 13R system. Does anyone know where I can find the code that sates wether or not I need to add a hose allowance to the calculations? The building does not have a lobby or any areas that would...

I agree FFP1, but the owner and the Architect do not want to budge on their design. stookeyfpe, I asked the AHJ about anti-freeze, and even though it is allowable per code, they won't accept it.

Sorry, I should have specified that I am using Quick Response Dry Pendents on return bends.

Hello everyone, Need an opinion on a sprinkler system design. Code states dry pipe system should only be installed where there is not adequate heat for a wet system. Here is my dilema..... Building owner has a one story building with a would attic/dead space. The drywall ceiling is tight to...