The tube well casing houses the inlet, cylinder, piston valves and rising main of a "down-the-hole" type hand pump.
ðə tˈuːb wˈɛl kˈeɪsɪŋ hˈaʊzᵻz ðɪ ˈɪnlɪt, sˈɪlɪndɚ, pˈɪstən vˈælvz ænd ɹˈaɪzɪŋ mˈeɪn əvə "dˌaʊnðəhˈoʊl" tˈaɪp hˈænd pˈʌmp.