Quick Answer: The Lift Pump is a borosilicate glass 3.3 model of a suction pump, with a ground-glass plunger carrying a flap valve and clack valves at the inlet and piston. It stands about 350 mm to 400 mm high with a 45 mm bore.
Last updated: October 2026
Key Features
Borosilicate glass 3.3 cylinder
Ground-glass plunger with integral flap valve
Clack valves at the inlet and on the piston
Cylinder 45 mm internal diameter (nominal)
Overall height approx. 350 mm to 400 mm
Polished hardwood or polymer base
Technical Specifications
Specification
Value
Material
Borosilicate glass 3.3
Plunger
Ground glass, integral flap valve
Valves
Clack valves, inlet and piston
Cylinder bore
45 mm ID (nominal)
Height
Approx. 350 mm to 400 mm
Base
Polished hardwood or polymer
HS code
9023.00.90
About This Product
Working the plunger lowers the pressure in the barrel so atmospheric pressure pushes water up through the inlet valve, then the piston valve lets the water pass above the plunger to be lifted out. The clear glass shows each valve opening and closing, which makes the role of air pressure easy to follow.
Frequently Asked Questions
What is the bore of the Lift Pump cylinder?
The glass cylinder has a nominal internal diameter of 45 mm, and the model stands approximately 350 mm to 400 mm high.
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