Wooden plugs?
Wooden plugs?
(OP)
I am looking to get some wooden plugs to keep on hand for times when a corporation might get pulled out at the main and was wondering if anyone here had any experience with them. What do you use to keep them in place after you hammer them into the stop?





RE: Wooden plugs?
Have not heard of people using wooden plugs in years.
It seems like it would be just as easy to put a Ford repair clamp on and install a new corporation stop.
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RE: Wooden plugs?
While on a job several years ago when an old steel transmission line was replaced with ductile iron, the inspector on that job told me of their routine practice of using such plugs on that line. He told me one of their VERY large employees slipped in the process (of yanking one of these things out?) and hit his head, knocking himself out cold as a cucumber down in the water-filled trench. He said they had a sickens of a time getting that huge man up out of the trench in emergency mode!
RE: Wooden plugs?
RE: Wooden plugs?
RE: Wooden plugs?
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Wooden plugs?
RE: Wooden plugs?
RE: Wooden plugs?
RE: Wooden plugs?
RE: Wooden plugs?
A light tap is all that is needed, an aggressive impact will drive the plug in so far it will be difficult to remove. The plug is only used until the proper repair can be completed. The plug is used to slow/stop down the flow of water and allow the area to be excavated for the real repair work. The plug will naturally expand to hold itself in.
Corporations are typically pulled out by excavation contractors digging in the streets. The corp will typically shear at the closest thread to the saddle or direct tap. You will need an easy out to remove the remaining threaded section if you plan to replace the corporation with a new corp. Otherwise, a repair band will go over the hole, set the repair band on the pipe next to the wooden plug assemble the clamp so it is ready to tighten, work the plug loose and slide the band over the hole and tighten. This can be done under pressure but not the driest of jobs.
Plugs are available from USABluebook, Pollard Water, or your local Water works distributor.
The standard plugs work well in corps, to plug pinholes you will need to get the small ones or just whittle the standard ones to size. Note on the pinholes, inserting the plug will enlarge the typical pinhole as it is driven in, curling the thin area until there is enough meat in the pipe to hold the plug in place.
Bimr, call me a hick but we used a plug last month just as described above corporation example.
Hydrae
RE: Wooden plugs?
I'm not sure one could plan in the latter case on a wooden plug necessarily as being able to effectively plug up whatever's left after the service line is snagged (see the direct-tapped service line testing documented at http://www.dipra.org/pdf/DIPvsPVCTapping.pdf that revealed with regard to the pvc test mains, "In all instances, the pulling force caused the pipe wall to break in the area of the corporation stop, pulling pieces of the pipe wall out in the area of the corporation stops, resulting in destruction of the pipe itself in the general area of the direct tap connection.")
RE: Wooden plugs?