| | DIY Siphon hose that doesn't waste water
Here's a photo of each end of the siphon hose I made. It's a regular 25' garden hose with some fittings on each end to make it work. I drain my aquarium into a flower bed so the water is reused. You can use any length hose to get the outlet end outside.
Most important are the two ball valves on the hose - one on each end. I used PVC valves, but brass ball valves would work too. Gate valves tend to leak. The hose is stored full of water so it automatically self-starts the siphon. While emptying, I may or may not replace the PVC tee fitting in the tank with the barbed fitting so I can attach a vacuum.
To refill, the outlet end is connected to the under-sink connection. At that point I do use the PVC tee fitting in the tank so the rush of water doesn't disturb the substrate.
They make the special brass tee connection that goes under the sink so you can add the new water connection. Turn the little water valve under the sink off. Remove the existing flexible pipe that goes up to the faucet, install the new brass tee fitting, then install a new flexible pipe connection for the new water connection.
Use an 18" or longer flexible pipe so you can move the ball valve end around to where you need it without applying any twist to the other end. I used a brass ball valve there to make sure there were no leaks since it takes the full water pressure. With a little care you can move lots of water without spilling a drop.
Last edited by TWood; 03-02-2005 at 08:46 PM..