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Good job bimr, but at the bottom it says that appearing company name here doesn't certify that this particular company is making products that are UL listed, instead we need to look for the UL mark on the product:( I am reviewing pumps made in KSB Germany and Holland. Would you be kind enough to...

Dear DWeig, it's quite a process to find your product out from the site link you have provided. Do you recall the ones which are UL listed, as you said some are. Thanks for your input anyway. Dear Cronin, I am reviewing a material submittal. As per specs we are only supposed to approve UL...

Are KSB pumps UL listed. Second, should I go for a split case or end suction (horizontal) for delivering 750gpm in a fire sprinkler network. Thanks

Thanks bimr, for sharing in such a detail, I have already drilled on a spot and found out yellowish metal underneath, prob brass and has been given a nickel chrome finish...that makes it look like se. I will try the grinder method now, thanks anyway. Thanks dicksewarret and DVD for your thoughts.

How can one know if a floor drain is of stainless steel material or brass with chrome finish. Believe me they almost look alike and I really face difficulty at times while approving floor drains of stainless steel material. Please give some clue, thanks. 

How can one know if a floor drain is of stainless steel material or brass with chrome finish. Believe me they almost look alike and I really face difficulty at times while approving floor drains of stainless steel material. Please give some clue, thanks. 

Just want to know a little idea as to how many sprinkler heads can one i connect with a 4" dia line, 3" dia line, 2" dia line and so on. Would be great if someone could share it in a tabulated form, like making a table and putting different dia lines and sprinkler heads against each. I am after...

Where are these located inside AHU, how about having any impact on the static pressure. Usually what capacity AHUs do have these ?

Are there any such AHUs avialable which have built in sound attenuators. Meaning inside the AHU body, immediately after the blower fan...there is sound attenuators. Thanks

I use HAP for load calculations and it says, for conference room you need to have 10 liters / second per person. Obviously it looks contradictory with what you have referred to, but most of the HVAC designers use this software and systems are running perfectly without any complaints. Further I...

What should be the approximate height of a supply air duct inside a warehouse whose side walls are 6 meters high and racks for storing goods would be 5 meters high. I am more interested in knowing the height if air diffuser grille from FFL is this warehouse. Thanks

Does an underground chilled water pipe entering a building through grade beam or a wall require any kind of pipe sleeve. If so, what should be the material of the sleeve if the pipe entering is carbon steel, Sch 40. Thanks

Dear Enery Mix, Can you be more specific, it's not the issue about sizes. It's about knowing the exact specs of a carbon steel pipe that one should use for these systems. I am located in middle east.

In case of evaporating coolers, it would be disconnect switch, but in case of lighting fixture...it has to be on / off switch.

Thanks.

Let me put it this way, can someone share the specifications of a carbon steel pipe that can be used for chilled water and firefighting systems.

I am in the process of  designing a cold storage room, where should I provide the disconnect switch for the evaporating coolers (2 nos) and lighting fixtures. Should it be inside the cold storage room or outside. 

Is it mandatory to provide expansion joints to the sewage / drainage pipes wherever they cross the building expansion joints. We use PVC pipes, Sch 40 for this purpose.

Must say this thread has been a source of great info for me and gave me a chance to revise psychrometrics. Just little curious to know about adding humidifiers on the supply air way, if someone could clarify the moist air properties on its route from cooling coils upto the room with moisture...

Can someone tell the difference between the following and whether both can be used for chilled water piping system as per codes. 1. Black Steel Pipe Sch 40, seamless, Grade B (ASTM A 53) 2. Black Steel Pipe Sch 40, ERW, Grade B (ASTM A53)