... material to ensure water quality.2.Can be used with 3,4,5 gallon water bottle, Neck Dia. ... push down on the top of the pump. Why use SKL Manual Water Pump? 1.No batteries required. 2.No ... camping, etc. 4.Dust-proof outlet. 5.Suction tube with adjustable length to suit different vessel. 6.Spare brush for ... of such kind pumps in China,both hand pump and electronic pump,for 5 gallon bottle or small bottle, ...