Master 4032.830 أنبوب مطاطي لشفط الوقود

The Master 4032.830 is a rubber tube intended for the suction side of a fuel supply line – that is, the flexible hose that connects the burner’s oil pump to the fuel tank or day tank. In an oil-fired appliance, the pump draws fuel from the tank through this tube, so the tube must remain completely airtight and resist collapse under negative pressure. Parts of this type are typically made of a fuel-resistant rubber compound that stays flexible even at low ambient temperatures, preventing cracks or hardening that would introduce air into the fuel line and cause erratic firing or loss of prime. When selecting a replacement suction tube, the key parameters are the inner diameter (to match the pump inlet connection and the tank outlet) and the wall thickness, which determines the tube’s ability to withstand continuous suction without collapsing. The total length should be sufficient to reach the tank without sharp bends, but not so long that the pump’s lift capacity is exceeded. On an oil burner, the suction tube runs from the pump inlet to a foot valve or a shut-off valve at the tank, and sometimes includes an anti-siphon loop or a filter at the tank side. When replacing a tube of this kind, always inspect the end fittings – if the original tube used clamping rings or push-on connections, ensure the new tube’s wall hardness is compatible with the same clamping method. Check also that the rubber is rated for the fuel grade (kerosene or gas oil) and that it does not soften or swell in contact with the fuel. Any sign of kinking or flattening after installation indicates an undersized diameter or insufficient wall strength for the suction distance.