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#77964 - 07/30/01 01:46 PM Star Wars Experimint  
Mike  Offline
Member
Joined: Feb 2001
Posts: 62
No one was killed but people were hurt from this accident. http://seattlep-i.nwsource.com/local/33094_boom28.shtml


2017 / 2014 NEC & Related Books and Study Guides

#77965 - 07/30/01 05:20 PM Re: Star Wars Experimint  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,303
figures;
they're lookin' to lynch the last tradesman
[Linked Image]


#77966 - 07/30/01 08:56 PM Re: Star Wars Experimint  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,259
Fullerton, CA USA
Any "plumber" that would intentionally cap off a T&P valve isn't a tradesman. He's a menace to society.

I'll go get the rope.


#77967 - 07/31/01 07:11 PM Re: Star Wars Experimint  
Anonymous
Unregistered

This comment is not directed at anyone in particular, of course.

The plumber goes in. The T&P valve is leaking. He doesn't have another on his truck, so he just puts a plug in the end and leaves figuring he'll get another one sometime and replace it.


This reminds me of the penny in the Edison base fuse holder of a circuit that keeps blowing, or bypassing a GFCI that is nuisance tripping.

Just maybe the T&P valve was leaking because there was an actual by undetected malfunction of the heater.

Just maybe a GFCI trips because there is a real leak. And we all know that the fuse that keeps blowing is saying that the wires are overloaded.

The T&P valve on the water heater is the only pressure relief valve on many water systems. Capping it when it leaks is a lot like slugging a fuse when it blows.

We simply trust that no one is doing things like these within 465' feet of where we work, walk, or drive..


#77968 - 08/03/01 12:10 AM Re: Star Wars Experimint  
amp-man  Offline
Member
Joined: Jun 2001
Posts: 141
Sacto, California US of A
This brings back a recollection of a water heater/boiler explosion in a Bell Telephone building many years ago. PRV didn't work, it rocketed up from the basement into the employee cafeteria and exploded. Mass carnage.

Don't recall what the cause was, but it made a lot of us appreciate the importance of having a qualified operating engineer in the building...one who checked the boiler system regularly.


#77969 - 08/05/01 11:45 AM Re: Star Wars Experimint  
tdhorne  Offline
Member
Joined: Mar 2001
Posts: 345
Maryland, USA
Quote
Originally posted by Dspark:
This comment is not directed at anyone in particular, of course.

The plumber goes in. The T&P valve is leaking. He doesn't have another on his truck, so he just puts a plug in the end and leaves figuring he'll get another one sometime and replace it.


This reminds me of the penny in the Edison base fuse holder of a circuit that keeps blowing, or bypassing a GFCI that is nuisance tripping.

Just maybe the T&P valve was leaking because there was an actual by undetected malfunction of the heater.

Just maybe a GFCI trips because there is a real leak. And we all know that the fuse that keeps blowing is saying that the wires are overloaded.

The T&P valve on the water heater is the only pressure relief valve on many water systems. Capping it when it leaks is a lot like slugging a fuse when it blows.

We simply trust that no one is doing things like these within 465' feet of where we work, walk, or drive..


That same plumber may have turned off the power to the water heater. The occupant may have accidently turned it back on. One more reason to practice lock out tag out but even that won't always save you. I was working on an exhaust fan at a church summer camp and I had to disconnect it from its power which came from a shared circuit. I locked out and tagged out the circuit. When I returned with the needed parts the lock out had been torn off the breaker and the circuit reenergized to turn on the porch lights. Since no one had messed with the exposed wires no harm resulted but that was pure luck.


Tom Horne

"This alternating current stuff is just a fad. It is much too dangerous for general use" Thomas Alva Edison

#77970 - 08/05/01 11:45 PM Re: Star Wars Experimint  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,259
Fullerton, CA USA
Same plumber defeated a safety device on purpose. If it leaks, run a hose out the door or shut it off.

I'll go find a tree


#77971 - 08/07/01 05:00 PM Re: Star Wars Experimint  
Anonymous
Unregistered

That same plumber may have turned off the power to the water heater.
I don't see how that could change the fact that the PRV was capped - a glaring error independent of anything else that was done.



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