The Shallow Well #442 and #444 water well cylinders are closed top cylinders designed for smaller diameter shallow depth wells made with 11 Gauge seamless brass tubing.
The #442 plunger is all brass with hemispherical poppet; the check poppet is fitted with a special facing for a secure seal.
The #444 has a special facing on both the check and plunger poppet. A 2” clearance is provided for operation at each stroke specified.