Great info, Thom. Thanks
At 05:15 PM 9/22/2009, you wrote: >Todd: > >We do these all the time. The first thing to do is check with the Chief and >see what his pumper is able to draft at the altitude of the tank. (Hale 1250 >GPM pump @ 7000 ASL drafts about 11'-0" with over 350 Hp connected) What >connection they use for their hard line? Storz or NST and the size. > >This is another reason we use Xerxes tanks. SR20 load rated so the draft can >rise up out of the tank and the engine could actually park on the tank to >draft. >So let's say from the water line in the tank to finish grade is 8'-0" and >the tank is 12'-0" dia. With 6'-0" of cover. Will it draft? Yes and it will >continue to draft all the way to the bottom as long as they don't lose the >draft below 11'-0". >Here is the site for our Dry Hyd. Manual: >http://steamboatsprings.net/sites/default/files/page/1420/dry_hydrant_manual >.pdf > >Avoid Horz. Pipe in the draft. We typically see vertical to grade then a 90' >storz or NST fitting. If you need to get away from the center of the tank >two 45' ells one at grade and one at the connection height work. > >Ok so what he's saying is that this is an emergency back up to your pump. >You don't need to ADD anything for additional hose allowance. Our Fire >District, has about 25 similar tanks. They intend to use that water to >supplement shuttle tenders if there is a fire nearby, or to use it for >wildfires, besides as you have described. Since the tank is located on >private property, I suggest that the FDP get a use agreement with the owner. >Ours includes the FDP refilling the tank after use within 24 Hrs, and if the >tank is used for potable water that that refill be done by a water service >with FDA approve tankers, or if it's well supplied that the district repay >$X.XX per gallon used. > >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 Todd Williams >Sent: Tuesday, September 22, 2009 2:41 PM >To: [email protected] >Subject: draft line from suction tank. > >I am working on a project with a small pump and a buried suction tank. The >design was based on sprinkler demand alone since there are no hydrant >connections on the system. Now the local AHJ has come back and says he wants >a draft line on the tank. The sprinkler system will take approximately 11000 >gallons in the 15000 gallon tank. He claims he would only use it if the pump >failed to start. Being this is a rural department in an area with no public >water supply, I have a bit of a problem believing this. If I had to include >a hose demand from a draft line on a tank, would the standard hose demand be >practical? >The building is all LH and the hose demands would be 100 gpm. > >Todd G. Williams, PE >Fire Protection Design/Consulting >Stonington, Connecticut >www.fpdc.com >860.535.2080 >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://fireball.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 >[email protected] >http://fireball.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) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut www.fpdc.com 860.535.2080 _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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)
