Get the primary fermenter in a high position above the secondary fermenter because gravity is the force behind the flow through the siphon hose. Pop open the lid of the primary fermenter and leave it loose over the bucket until ready to siphon.
The siphon is assembled from several parts. The racking cane, and the siphon hose. These should fit together snug to prevent air leaks. The set up to the left uses a length of stiff plastic tubing on the other end of the hose which facilitates reaching the bottom of the secondary fermenter during siphoning. Another racking cane can be used as well. This is necessary because aeration by splashing must be avoided at this stage. The siphon is filled with clean water, and clamped with a spring clamp right above the racking cane. This helps to prevent the water from flowing out before inserting the racking cane into the beer.
A cap is placed on the end of the racking cane. This prevents the yeast and other sediment that has settled on the bottom of the primary fermenter from being siphoned with the beer.