Well, they help anyway.
"This odd-looking swirly-shaped pipe (pictured) is a green technology from a new British company called HeliSwirl. It’s a swirly-shaped pipe. It’s also a low-carbon technology - not because it is made with low-carbon materials or through some new energy-stingy manufacturing process, but because, well, because it’s swirly shape helps fluids flow through it more easily, requiring less power to run the pumps that pump the fluid."
Simple ideas are always the best.