02/04/10 52 W, 1 I - + 4 - 8 Longest Lays?


For pre-weekend discussion, what are some of the longest supply lines that you've laid in your day? When, where, and how far? Did you use booster pumpers? Share your stories. For extra credit, can you identify this line laid in more recent times?
 





the last long (more than 1 truck) lay I remember was the Malbay Lane fire, 2400 feet of 5” with an Engine at the hydrant.
AB - 02/04/10 - 21:56

Looks like there should be one on that plug too….pressure might be great, but you never know until you turn it in.
Silver - 02/05/10 - 00:09

As a caveat… “Humat at the hydrant.” It’s a good tool to use if hydrant is already committed and you have a long lay where “boosting” is needed due to supply line friction loss. I have data on the effectiveness of the Humat Valve as we tested it on A-Shift. We found it to be very effective when higher flows were required from the initial attack GPM needs. Remember, as your flow doubles, your FL increases by a factor of “4”. A stand-alone 5” from the hydrant is often deemed as a “no friction loss” situation, however if there is a long lay and/or high flows are eventually needed, oh well, oops… Coming to a RFD near you soon… Contact me offline and I’ll discuss the hydraulics, application, and/or get our data to you. (no, I’m not a salesperson).
A.C. Rich - 02/05/10 - 01:11

Some of the time it should be in place, whether it’s a Humat or just an engine doing the work. Well put A.C., I think you have your gig lined up after you retire!!!
Silver - 02/05/10 - 01:27

Apex put almost 2000’ of 5” on the ground in 2008 for a mulch fire that the smoke was causing problems around town. Shut down the old part of Hwy 55 for most of the day. No pumper to boost pressure in the middle best I remeber had pretty good pressure just to be spraying water on a large pile of mulch.
[apexfire] - 02/05/10 - 01:40

What the hell is a Humat, you ask? Brand of hydrant value, a four-way valve, read about it here, http://www.humat.com/
Legeros - 02/05/10 - 07:33

Bearpond VFD, Henderson NC. Sept of 2006, Mulch yard on fire. 2800’ of five inch with engine boosting pressure from Hydrant.
R. Finch - 02/05/10 - 08:12

Longest I have ever seen was 3600’ in Prince William Co, Va about 11 years ago at a salvage yard/ multiple structure fire… 4 engines total…1 forward laid in, the other 3 reversed and they put an “in-line” engine every 1000’ and one on the hydrant to maintain pressure. Crews stayed out on that scene for almost a week.
The longest I have done since relocating here was last year and it was only about 1500’
Wayne - 02/05/10 - 10:30

Hahaha Jeff, you’re funny (sometimes), but really no gig… I actually plan on being a male fashion model when I retire! I was VERY speculative of the performance of the Humat device when we tested it – we also tested the Akron model #627 http://www.akronbrass.com/uploadedFiles/.. ; These devices do have a place in municipal and “rural” water supply where hydrants are used (although they are expensive). If you put a pumper at the hydrant when you start your water supply efforts, all is well. However when a FD encounters a situation where they initially straight lay from the hydrant (as we all do), AND the fire conditions intensify requiring more flow, the device is priceless for boosting pressure. I can’t make a hydrant “better,” but will help overcome the friction loss in the LDH when you attempt higher flows. In my (debatable) opinion, these devices are good tools to connect to a hydrant FIRST on any 5” forward lay.

On aside, and old School… 3” hose, single 3” 700ft, then reversed dual 3” 1000ft (~500gpm flows). It’s the “po folks” LDH in a rural area with homes “off the road” and cul-de-sacs, with tanker shuttles to a drop tank based drafting point.
A.C. Rich - 02/05/10 - 12:03

Hey Raymond, You fire was the longest I have ever drafted from a pond. Seems like it was about 4 hours from the front sunction with 3 sections of hard suction. Seems like the best I could do was around 600gpm for the deck gun about 400” away.
Rob Mitchell - 02/05/10 - 12:29



  
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