Draining water tank on trailer
When I lay up my boat for the (hot!!) summer on the trailer I drain the 13 gal. flex tank in the bow. I used to do it with the electric pumps, but now I have about a 15' length of clear vinyl tubing that fits on the spigot of the faucet, and goes thru the cockpit and under the engine mount and lays on the ground. A few pumps of the faucet pump starts the siphon effect, and draws about 1/2 gal per minute out the vinyl hose. It drains as much water out as the electric pumps do, with no wear and tear. I've done it several times and it works.Of course, it only works because of the height of the boat on the trailer above the ground.