Product Manual

Page 12
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6.4 Liquid Containers:
6.4.1 One 200 L (55 gal.) barrel for the main liquid supply anda length of rubber hose
to siphon liquid from the barrel to fill the calibrated head tanks (see 6.9.3).
6.4.2 A 13 L (5 gal.) bucket for initial filling of the Infiltrometers.
6.4.3 Two Turf-Tec IN12-W Mariotte Tubes having a minimum volume capacity of
about 3000 mL and 10000 mL (See Notes 1 and 2 and Figures 2 and 2A).
NOTE 1—It is useful to have one head tank with a capacity of three times that of the other
because the area of the annular space between the rings is about three times that of the
inner ring.
NOTE 2—In many cases, the volume capacity of these calibrated head tanks must be
significantly larger than 3000 mL, specially if the test has to continue overnight. Capacities
of about 50 L (13 gal.) would not be uncommon. These large volume IN13-3 Mariotte
Tubes are also available from Turf-Tec International.
6.5 Liquid Supply—Water, or preferably liquid of the same quality and temperature as
that involved in the problem being examined. The liquid used must be chemically
compatible with the Turf-Tec Infiltration rings and other equipment used to contain
the liquid.
NOTE 3— To obtain minimum infiltration rates, the liquid should be free from suspended
solids and the temperature of the liquid should be higher than the soil temperature. This
will tend to avoid reduction of infiltration from blockage of voids by particles or gases
coming out of solution.
Figure 2 - Relationship of height of Mariotte tube to achieve a
constant head of water inside Infiltration rings
(To see this relationship, see Figure 4 and read section 8.6.8 to 8.6.12)