Join Date: Oct 2007
Location: Ontario, Canada
I'm in the process of building one.
It's not that much cheaper than the real thing.
Basically I went to PetSmart, looked at the real Python, understood how it works, memorized the features, went to Home Depot, bought a 25 feet garden hose, and a garden Y-valve (the nice feature is that both exits have stop valves).
I used the garden hose instead of clear vinyl tubing because the vinly tubing is more expensive when you add in the cost of having to find end fittings. I think it's like $10-15 for a decent diameter of 10 foot vinyl tubing.
The only problem I have so far is finding a damn adapter so the hose will fit into the kitchen tap. I've bought individually 3 adapters already, and each time it doesn't fit. The first two times, I was too lazy to measure the size of the kitchen, the 3rd time the Home Depot plumbing expert gave me the wrong one. I'll go again and try later on.
25 feet garden hose: $19.99
Y-valve with 2 stop-valves: 9.99
The total comes to about $40, so you actually don't save that much more money. The real python is 49.99 at BAs. Including the gas money for the 3x I drove to Home Depot, I would probably be better off buying the real thing. However, I hope what I did could help others make their own. It's pretty simple.