Diverts first, dirtiest runoff—dust, pollen, ash, droppings, fine sediments—before tank. Set-and-forget ball-and-seat seals when the chamber fills; cleaner water bypasses automatically. Self-draining valve empties after rain, resetting for the next shower. Size to roof area: 0.5–2.0 L/m²; ~5.7 L per metre of 90 mm, ~8.8 L per metre of 100 mm pipe. UV-resistant PVC; fits 90 mm or 100mm downpipes commonly found in NZ. Simple solvent-weld install; quick bottom-cap cleaning and maintenance. Get cleaner tank water from the very first drop. The Blue Mountain First Flush Diverter Basic Tee is a low-cost upgrade that helps protect pumps, filters, and appliances—and installs in minutes. Order from Aqua Works Warkworth with click & collect or NZ-wide shipping.
