Hi Thom, Thanks for the feedback. We have been operating under the same set of assumptions you are speaking of and we are starting to see lots of issues about old pipe becoming severely tuberculated (for example the water map shows a 8 in main, but the water test shows the main to now be equivalent to a 4 in main. Some of the older pipe that was installed is unlined DI, the tuberculation is brutal. The concrete lined DI does not share the same problem
So, be careful about assuming the pipe is good, if it was unlined it may be much smaller than what it was originally. Rich >>> "Thom McMahon" <[email protected]> 05/12/2009 10:47 >>> Flow tests in well established areas need not be as frequent as in newly developed areas. Example: Down town Seattle most likely has not changed significantly in the last 20 years. A 5 year old test is still pretty close to a current test, within the variance you'll see for time of day or season of the year. However in a new industrial park, where 6 Mo. Ago there were empty lots, and now you have Mfg. food processing and other high use installations, 6 Mo. May have been too long. Location Location Location! Here in the dry west, we'd rather use a hydraulic model than flow an open hydrant. We really need to save that water for Kentucky blue grass the planners thought appropriate for a desert. Thom McMahon, SET Firetech, Inc. 2560 Copper Ridge Dr P.O. Box 882136 Steamboat Springs, CO 80488 Tel: 970-879-7952 Fax: 970-879-7926 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of R Richardson Sent: Tuesday, May 12, 2009 11:02 AM To: [email protected] Subject: Hydrant Flow Test time frame for validity We are reviewing our policy as to the length of time for use of hydrant flow test data. We have heard ranges from as short as 6 months to 18 months. If the forum members would be willing to share thoughts as to how old of a test is accepted by the AHJ's you deal with it can help guide our revised policy. Thanks in advance, Rich Richardson Seattle Fire Department _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
