Get cleaner rainwater into your tank. Between downpours, dust, leaves and animal droppings can settle on your roof. When the rain returns, the first flush of water washes them off, and your first flush diverter sets it aside to keep it out of your tank. So only the cleaner water that follows is stored. Built for whole-of-house and commercial catchments, the Delta's manifold design creates a high-capacity diversion chamber from standard 100 mm pipe. This kit leaves out the tee piece and reducer so you can fit it to your existing setup. Just add your own tee and pipe.