Actually it is quite common to start a siphon using Joshua's method but one can dispense with the bucket altogether.
Make sure that the hose is clean of anything that might be a contaminant to the source vessel and the destination vessel. Then lower one end of the hose into the source making sure that as the hose is lowered in so that the fluid can flow up into the hose without trapping a bubble in the hose. When the entire hose is in the source and the end intended for the destination vessel is submerged the hose will be entirely full of the fluid. Place a thumb over the end of the hose and pull it out and down in to the destination vessel before removing your thumb. As long as the source end of the hose remains covered and no air gets in the siphon will start.
It
should be noted that a siphon can only work if you do not have to lift the fluid (assuming it is water) more than about 33.9 feet before it starts flowing down hill. (that is because at atmospheric pressure, the water where the hose goes down hill has to suck the water up hill and a suction will not lift water more than that and as a practical matter not even quite that high. If siphoning some lighter fluid such as
gasoline one could not ever lift the fluid that high on the suction side of the siphon.
I have planned a siphon to water my garden from my
pond. this is possible because my
pond is higher than the elevation of my garden which is in a low spot about 70 yards away. I have the ability to use a hose from the faucet but that is chlorinated water and I have found that some plants do not like chlorinated water as much as they like pond water or rain water or the condensate from an air conditioner (all of which are non chlorinated).
The scheme is possible because the garden is lower than the pond surface, so this calls for
1 place a pipe into the pond and run it over the intervening high ground (aka the hump) and down to the garden
2 at the
highest !!! point put a "T" into the siphon pipe with the "stem of the "T", a pipe projecting upward, a convenient height (about waist high). I call this the "filler pipe", and have a valve at the top end of the filler pipe.
3 put a shut off valve at the low end at the garden
4 put a "foot valve" on the end in the pond. (note, a foot valve is simply a check valve that prevents flow from the pipe back into the pond.)
5 With the valve at the garden end closed, open the valve at the filler pipe and pour water into the filler pipe to fill the siphon pipe. The foot valve and the garden valve will allow the pipe to be filled. When it is full close the valve on the filler pipe.
6 open the valve at the garden end and the water will flow.
Note that unless the garden is very much lower than the pond there will be flow but not much pressure, so it will not run a sprinkler of spray from a hose, this will usually be much more of a flow for irrigation trenches, unless you have a really large height difference, pond to garden. To get a larger flow use a larger pipe between the pond and garden but the filler pipe can be smaller, to keep the cost of the filler valve cheaper.
Theoretically the system would work without the filler pipe and valve, however getting the siphon pipe filled would be difficult, and dissolved air in the water would eventually form a bubble at the high point and break the siphon. So the filler pipe is there to simply allow easy refilling of the pipe.
If the duration between uses is long, one might have to top up the filler pipe before each use.
A. --The foot valve is necessary to get the pipe full in the first place.
B.-- It would be a good idea to use some pipe fittings above the valve at the filler pipe to create a permanently installed Funnel .
C.-- the maximum lift is about 33 feet as the height to get the water over the hump and hopefully less than that.
D.-- This scheme is easier to install than a buried pipe and poses no risk of a pipe trench becoming a leak or drain for the pond and flooding the garden.
E.-- The pipe into the pond should extend to the lowest level to which you would be willing to drain the pond in a drought
F.-- When the system is turned off and idle, the low pressure near the hump will tend to pull dissolved gases from the water in the pipe and break the siphon, If the garden end valve is opened when the siphon has been broken, the pipe to the garden will be drained and that is all you will get. So if you can have the stand pipe made of transparant pipe or tubing it will be easier to see if such a bubble has formed and refill just the bubble volume rather than refill the whole pipe, or you could just top up the filler pipe every time before drawing water at the garden if this is a problem.
G.-- For protection of the pipe during winter freeze, just open the filler pipe valve and the valves of the siphon pipeat the garden and pond endsto drain the siphon pipe. Another valve at the pond end would aid in draining that end of the pipe.
If the pond water has an excess amount of dissolved gases, it is possible that the siphon may be broken by gases accumulating at the high point during the siphoning process. Which would require refilling the siphon and filler pipes.
As there is a slight slope to my garden plot I already, have the rows laid out across the slope to prevent erosion during heavy rains.
For a larger area to be irrigated it may be necessary to use the same method to lay out the rows along contour lines as is done when building swales.
If you wish to experiment with this before you go and buy all the pipe, you can experiment with garden hose if you have them or can borrow some and even get an idea what flow rate you can get with a pipe of the same size.