NSF

bean

What does NSF Stand for ? What does it mean?

pecmsg

http://www.nsf.org/

pecmsg

https://www.nsf.gov/

Intplm.

That acronym has more than one meaning. You might be referring too.
How it applies to heating and plumbing folks is .....
The National Sanitation Foundation. (NSF)
They are an organization that provides product development and product standards. Have you seen the stickers or engravings on some products that say "NSF Certified" that we use. That's them.
There are other definitions for other organizations.

Ironman

Non sufficient funds.
National Sanitary Foundation.
Not So Fortunate.
Not So Funny.

Intplm.

Like @Ironman said🙂

hot_rod

November, Sierra, Foxtrot

Brewbeer

Not Safe For .........

DanHolohan

National Sanitary Foundation.

Here’s a good collection of acronyms. The Wallies built this list years ago. Feel free to add to it: https://heatinghelp.com/systems-help-center/what-the-heck-do-those-letters-stand-for/

Intplm.

@DanHolohan How do I add a Acronym?🙂

DanHolohan

Post it here. Erin will add it. Thanks!

Intplm.

DanHolohan said:

Post it here. Erin will add it. Thanks!

Great. Thanks. I have two. These two I found on a blue print that was very confusing. Hopefully someone will read it here and not have the same confusing experience.

PV -------- Pneumatic Valve
PVA------- Pneumatic Valve Actuator

DanHolohan

Thanks!

Intplm.

OS&Y is also "Open Stem & Yoke"