Water Butt Linking Kit 1.5" 40 mm Corrugated Pipe 2 m Straight Fittings Nuts. This1.5" Water Butt Linking Kit is designed to connect two water butts or rainwater tanks together using a flexible. The kit includes a2m length of 40mm corrugated hose, along with2 x straight 1.5" barb to 1.5" BSP male.
eBay