Rainfresh BH high flow filter housings are ideal for large homes (with up to 6 bathrooms) or light commercial applications such as motels, campgrounds, bed and breakfast, commercial kitchens etc. Featuring full 1? threaded ports, Rainfresh BH housings deliver flow rates of up to 40 US GPM (75 lpm) with minimal pressure drop. BPA and lead -free materials and certified for material safety and structural integrity.