View Full Version : Grooved pipe coupling bad design
01-17-2010, 02:50 PM
I was looking thru a trade mag. and saw that grinnell (#772 coupling) actually has areas that are open where the backside of the gasket is exposed,were anyone with a car key,pocketknife etc. can poke a hole in it,wish i could post a picture but i cant find it.Cant belive someone would design this and not catch that flaw.
01-17-2010, 03:32 PM
I wouldnt worry about it. I can punch a hole in copper pipe with a hammer real easy. Nothing is full proof. Have you found problems years after the installation?
01-17-2010, 03:54 PM
Most of the grooved joint brands I see are installed pretty far from where some trickster could reach them, such as ceilings.
01-17-2010, 04:53 PM
Anything can happen, I wouldnt worry about it or you'll drive yourself nuts.
I had a call where a kid threw a dart from half way across the basement and it stuck into a 3/8" oil line. Amazing shot, but if something like that can happen then anything can happen...
01-17-2010, 11:40 PM
Mr. Murphy's law... nobody builds a shield that can withstand it.
01-18-2010, 03:15 PM
We had a Federal Law Officer, drive past a Clearance sign, three hanging low clearance PVC pipes, one clearly said Glycol piping ahead. Ripped a huge hole in a copper line, at 0500, left the scene, without reporting it, we had System filled, back on line before noon. With the glycol weeping from above, would have hated trying to braze another piece of pipe in. BTW the pipe was six inches.
The clean-up ran into six days.:eek2:
01-18-2010, 05:12 PM
I've seen these things on the wall with two slots in each area. You could put a key in there an get electrocuted, I've seen them in all kinds of public places with no warning signs what so ever......
We should be required to put some sort of lock boxes over them and you need to be trained in order to get they key..
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