I have to write How to Install Manual and a Material Specification for couplings in our water distribution system. A problem I am having is what materials the coupling and bolts should be made from. I prefer ductile iron center and end rings with stainless 304 bolts and nuts. I also have to...
Thanks so far!!!
I think a little clarification is needed. Valves were mostly direct bury with either bell by bell or spigot ends with poured lead joints. Replacing those we would cut the cast iron pipe on each side and replace with mechanical joints. Small spool pieces of ductile iron would...
I apologize if this topic has been discussed before. I could not find it using the search tool. I work for a water supplier and I am responcible for writing specs. We have repeatedly argued over what valve is superior in a distribution system and a transmission system. Our system is over 100...
Thanks for replys.
I'll respond to reply in order:
1. Hm.. could it be that the operator is trying to open an already open valve? Are the 4" valves breaking or the 24" valves breaking?
Typically all main line valves are open and bypasses are closed. When the valves were installed a written...
The water utility I work for has purchased a couple of Wachs valve operating machines. A 24-inch transmission main is being cleaned and cement mortor lined. There were two 24-inch gate valves with broken 4-inch bypass valves. I had an operations crew go out and check all the valves on near...
I work for a water supplier and the operations crews have been assigned the task of operating all the valves in our distribution system. The crews are newly formed and do not have alot of experience. Just recently we have found 4 broken 24-inch gate valves. I suspect the crews are using a...
