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Hydrant requirements

  • 31-08-2013 09:51AM
    #1
    Fluffybums
    Registered Users, Registered Users 2 Posts: 362 ✭✭


    Not sure if this is the correct place for this post, I've also posted in the planning forum, apologies if it not.

    I live in a 7 year old estate of 20 houses, all wood frame, with its own borehole supplying the water.

    There was a fire in the village recently for which the Fire Service needed to access a second hydrant in order to fight it effectively. The fire had resulted in the electricity line being cut so we had no electricity which meant we had no running water. The second hydrant, it is a buried connection point, is in the middle of the road in the estate, we obviously showed the fireman where the hydrant is and pointed out that the water was off. The hoses were connected to the hydrant and there was a conversation between a couple of fireman that seemed to be about thread sizes(??) but nothing happened. I took the fireman up to show him the well and he said they might be able to bring in something to pump direct, this didn't happen. They ended up using two water trucks to go up and down to the river 10-15km away.

    As you can imagine I am now a little concerned that the hydrant in the estate is little more than window dressing. I have checked the planning permission and one of the conditions is
    Cond. No. 17: Fire Hydrants to be installed in accordance with Technical Guidance Document B of the Building Regulations 1997 and BS 5306 Part 1 1976.

    My question is what does this mean? Someone was saying that the well should have had a back up power supply and that it is a criminal offense that it does not. Thanks for any help.


Comments

  • #2
    Paulzx
    Registered Users, Registered Users 2 Posts: 1,998 ✭✭✭Paulzx


    This is the guidance document you are referring to

    http://www.environ.ie/en/Publications/DevelopmentandHousing/BuildingStandards/FileDownLoad,1640,en.pdf


    From page 116 deals with water supply. You'll have to try and apply it to the your own circumstances re building type etc.

    Unfortunately it's not entirely clearcut


  • #3
    wreckless
    Registered Users, Registered Users 2 Posts: 702 ✭✭✭wreckless


    you need to contact the water services department in your local authority. almost sure that a development only has to provide hydrants but the water that comes out is the LA's responsibility.

    the reason the FS ferried water from an open source is there was not enough pressure or just a lack of water in the hydrant. they should of and probably did have the 2 types of hydrant standpipes, bayonet and screw type.

    fyi and others.

    a standard turnout firefighting appliance will have at most about 2000 litres of water in the tank.

    so, assuming a hose reel is used, high pressure , low volume at a rate of 100lpm at 24bar, you get 20 minutes firefighting before it runs out.

    now, if they increase the size of the hose to say a 45mm (higher volume and lower pressure), and connect a bout 2 lengths together, 46m of hose, each taking approx 80L to fill, pumping at 400Lpm at 5bar, this will last about 4-5 minutes.

    change to 70mm hose, 180L to fill one, pumping at 700Lpm , yeah, about 2-3 minutes....empty.


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