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1000L IBC

kev vankev van Posts: 114
in Problem solving
Got my my IBC all in and it's got around 300 to 400l in it. Attached the hose not s drop. Before I cut my hose to a lengt of 2m do u think it will work to fulla watering can up? Anyone had a similar problem and solved it if so how? And yes the tap was opened
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Posts

  • madpenguinmadpenguin Posts: 2,543
    ?  :/
    “Every day is ordinary, until it isn't.” - Bernard Cornwell-Death of Kings
  • wild edgeswild edges Posts: 10,497
    Yeah I found the same thing. The pressure wasn't enough to force any kinks out of the pipes. You need a good height of tank to really get a good pressure out of it. I just use a 4m length of hose and use it to fill watering cans etc now. Get a hozelock butt pump if you need to use a long hose.
    If you can keep your head, while those around you are losing theirs, you may not have grasped the seriousness of the situation.
  • Hampshire HogHampshire Hog Posts: 330
    It all depends on the head of water, height of tank off the ground capacity of the tank there are calculators on the web that will give you the answers for any length of hose you need to supply, but I think you will be shocked at the height needed.

    You only get about 3psi when a 1000lt IBC is full at 1 mt of the ground so very low pressure as above if you need to feed a long hose the a pump is really your only answer.

    I use mine at the allotment just to fill watering cans and it 500mm off the ground.
    "A society grows great when old men plant trees whose shade they know they shall never sit in."
  • kev vankev van Posts: 114
    Cheers. I'll look at pumps but I'd rather not have to cut the IBC. I have a height difference of 6 or 7 inches which I only intended to use to fill watering cans. I might consider a drill pump to just fill the cans. I'd have loved to put the IBC higher but wouldn't look right
  • plant pauperplant pauper Posts: 6,904
    For those who still don't know...
  • raisingirlraisingirl Posts: 7,093
    Lifting the IBC higher off the ground won't improve the flow rate (just makes it easier to get the watering can under it). It's the depth of water in it that drives the pressure. They aren't designed to produce a high flow rate - they are usually just connected to a water trough for animals and it only has to trickle out very slowly. You can probably replace the tap with a wider bore one but as you say, that means cutting the tank and they are fairly expensive to be mucking about with. I'd agree with Wild Edges - if you want to run a hose off it your best bet is to drop a water butt pump into it. Otherwise just get a short length of hose and two watering cans so one is filling while you're using the other. Works for me.
    Gardening on the edge of Exmoor, in Devon

    “It's still magic even if you know how it's done.” 
  • Papi JoPapi Jo Posts: 4,254
    Hazel 1 said:
    I'll second that
    I'll third that. ;)
  • wild edgeswild edges Posts: 10,497
    Pressure=force/area

    To increase the pressure you need to increase the sectional area of the pipe. As @raisingirl says the force is only increased by increasing the water level (although gravity does have some effect). Upgrade to the blue MDPE pipe which is 25mm I think and you'll get a better flow but it's just not very flexible. Good if you want a tap elsewhere in the garden though.
    If you can keep your head, while those around you are losing theirs, you may not have grasped the seriousness of the situation.
  • Hampshire HogHampshire Hog Posts: 330
    We use to design a lot of water storage, borehole and irrigation systems in my last company. 

    The actual calculation is P=ρgh, where ρ is the density of the water (Weight), g is the acceleration due to gravity( feet per second), and h is the depth of the water.

    h is the difference between the height of the surface of the water and the height of the point where the pressure is measure, such as the outlet of a hose coming from the tank.

    The pressure from the tank is based on the height of the tank. A tank on a 25' tower will supply at least 12.5 pounds per square inch. (we don't know the height of the surface of the water.) The 3/4 inch pipe has an area of .44 sq in. Thus the 3/4" pipe will have a pressure of 5.5 psi. The 2" pipe has an area of 3.15 sq in. Thus it will have a pressure potential of approximately 40 psi. reducing the pipe down to 3/4" after the drop will increase pressure by about 2.6 so an estimate of the pressure on this pipe would be about 90 psi.

    So the answer is build a 25' tower cover it in climbing plants and the problems solved  :)
    "A society grows great when old men plant trees whose shade they know they shall never sit in."
  • raisingirlraisingirl Posts: 7,093
    HH I suspect that the problem in this case is the throttle effect of the outlet from the tank as opposed to the pressure drop along the length of the hose. Whilst it would be possible to raise the tank and/or increase the diameter of the hose (or employ one with a smoother internal surface) in order to improve the rate of flow within the hose, that doesn't improve the rate of flow into the hose from the tank in this instance. 
    Gardening on the edge of Exmoor, in Devon

    “It's still magic even if you know how it's done.” 
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