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  1. #101
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    Quote Originally Posted by MG3610 View Post
    I don't get the whole idea of "matching hose to the pump size." Regardless of draft or off a pressurized source, the LDH will always allow the pump to perform to the maximum capacity. That measley 500 GPM pump on a decent hydrant might get up to 1000 or 1250 GPM if it gets enough water. Likewise using 5" LDH, at draft, if the pump is not fighting the friction loss of 3" hose, youll move the same quantity of water a longer distance or a greater quantity over the same distance as the equivalent length 3". Am I wrong to think this?
    Nope you are 100% correct. Larger hose always has less friction loss.

    And you are correct about the incoming pressure and flow. The 500 gpm pump could easily supply more than that under incoming pressure.

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    I had hear from someone, somewhere

    That LDH was orginally mass marketed for rural/suburban water ops. Long lays and large GPM requirments. I think Angus marketed that way back in the 80's. That over time it has been picked up by urban departments, and the myth of hydrants needed for LDH developed.

    Like i said, I seem to have a cloudy memory of hearing that at some point in time. Has anyone else heard this or am i just dreaming about engine ops and fire hose again. (please don't tell my wife if i am haha. I already hear you would rather fight fire and be at work then go to dinner with me enough!!)

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    We've run it since the early seventies.One of the first depts around here to do so,long before the cities got it. As I said earlier,we're going bigger. No small supply lines here. T.C.

  4. #104
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    The best supply is one that is charged and on posative water.

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    Quote Originally Posted by TRUCK61 View Post
    The best supply is one that is charged and on posative water.
    I agree but will add this highly politically correct statement:

    The correct supply line size is the one you determine is appropriate for your district, water supply issues, and the buildings your serve. This determination comes from research, testing, and practical experience.

  6. #106
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    quote:
    The correct supply line size is the one you determine is appropriate for your district, water supply issues, and the buildings your serve. This determination comes from research, testing, and practical experience.


    couldnt have said it better myself

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