Adam - I'm impressed! I only have two myself! Actually, I do cheat slightly - I keep them open at the mo because they arent full, but did have a leaking hosepipe, so I just fed it into the water butt until it was half full. I then use a watering can to water my plants in the plot and in the greenhouse. Thanks to the awful weather we've had here in Preston over the past week or so, no need to use either method and the water butts are filling up nicely!
dexterdog