The Combination Permeameter is more economical and allows granular samples to be tested by either the constant-head or falling-head methods, but do not strictly meet ASTM and AASHTO requirements. Construction and chamber sizes are similar to the ASTM/AASHTO Permeameters, but they are not equipped with sidewall manometer ports. Constant-head reservoir, scale, manometers and all necessary tubing are included..
Meets Test Methods:
AASHTO T215
ASTM D 2434