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John Wilson (Unregistered Guest)
Unregistered guest
Posted on Tuesday, October 04, 2005 - 05:25 pm:   Edit PostDelete PostPrint Post

I am the safety manager at my plant and we are expanding and building a new 40,000 sqft facility in california. it was brought to my attention that the utilities contractor ran new 2inch line for the building but used an existing 1 inch valve at the meter with a 1 inch nipple and a 1 to 2 inch bell reducer. Can anyone tell me if this is a code violation. Thanks
John Bunzick, CCS, CCCA
Senior Member
Username: bunzick

Post Number: 418
Registered: 03-2002
Posted on Wednesday, October 05, 2005 - 06:02 pm:   Edit PostDelete PostPrint Post

I don't know if it is a code violation or not. However, when it comes to everything up to and just past the meter, usually it is the local utility that has the engineering responsibility. You might want to contact them and see if it passes muster with them. Most likely, they would not have installed the meter if it did not. They should have a project engineer familiar with your building since it was just done. By the way, I have seen pipe size reductions at meters similar to what you describe, but I don't have the knowledge to understand why it's done and what the impact is.
Randall L. Cox
Senior Member
Username: randy_cox

Post Number: 20
Registered: 04-2004
Posted on Friday, October 07, 2005 - 11:55 am:   Edit PostDelete PostPrint Post

I can't remember any gas line reduction, but I've seen this done with water, and I am guessing that the issue is similar.

In multifamily projects, our 4" water lines are routinely reducted to use a smaller meter. The first time I saw this change, I redmarked the engineers drawings because I thought they made a mistake.

Meters in the size that we are talking about apparently have something that moves when water flows past. There is a small amount of inertia and friction that must be overcome. If the flow rate is too low, that doesn't happen, and the flow is not recorded. For that reason, the local water utility requires that the meter be a smaller size than the service line.

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