5/8 in. 90 Degree Thru Hull Vent | Moeller Marine Products 033201-10 Chrome vent with 90 degree bend for venting marine fuel & holding tanks. Moeller Marine thru hull tank vent 5/8 in. hose barb for 5/8 in. inside diameter hose Chrome plated brass Accommodates hulls up to 1/2 in. thick Ideal for fuel and waste tank ventilation