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View Full Version : Dead ends-not prohibited-why?

gear junkie
03-27-2008, 06:24 PM
http://www.ridgidforum.com/forum/showthread.php?t=16672

This was a thread Dunbar started on a ruptured expansion tank that got me thinking(I work for the government, lots of spare time). The tank essentially became a dead end one could see all the crap that was contained in it. Why isn't a water supply dead end prohibited in the IPC? Seems like a no brainer.
aero1
03-27-2008, 07:06 PM
you know you could equally apply that question to copper air chambers, when i was in michigan the inspectors wanted 18" pieces of capped pipe on the water supply to all fixtures, which were worthless because they quickly would waterlog and walla you have a dead end, good question.
gear junkie
03-27-2008, 07:10 PM
I have to install 2 thermostats on a water heater and I was thinking about the dead end issue.
proplumb
03-27-2008, 07:21 PM
the 18" peices of pipe are for water hammer and are not a waste. it takes a while for them to fill up and are easy to drain.
aero1
03-27-2008, 07:39 PM
thats if people take the time to do that and you know as well as i do they dont,i dont even know if they are still in the codes up there, down here we have to use an approved device ie hammer arrestor,as technology changes we must as pros evolve with it when its good and challenge when its not so good.
aero1
03-27-2008, 07:52 PM
I have to install 2 thermostats on a water heater and I was thinking about the dead end issue.
as long as you dont mix galvy with copper, if you think about the temp changes whether its on a circ or static you will get enough displacement of water that build up and it may still be slight should not be an issue. remember the hotter the water the more disolved minerals come out of solution and become solids ie around 140-160 degrees, we tell our comm. customers that yearly inspects should be done. in our business one of the few certain things is things our going to fail.
mtnman1100
03-30-2008, 10:25 PM
Expansion tank would be considered a apparatus and the 18" air chambers have to be installed as to be able to drain if they become water logged, by installing valves on them. If memory serves, IPC does not allow dead ends in water pipe except for future expansion.
gear junkie
03-30-2008, 10:37 PM
Expansion tank would be considered a apparatus and the 18" air chambers have to be installed as to be able to drain if they become water logged, by installing valves on them. If memory serves, IPC does not allow dead ends in water pipe except for future expansion.
IPC only talks about dead ends for drainage.