Product Manual

Page 16
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1471 Capital Circle NW #13, Tallahassee, FL. 32303 - USA
8.6.3 Fill both the Turf-Tec Mariotte Tubes with water to the top of the site glass. This
is accomplished easiest by attaching a positive flow 1/2” ID x 5/8” OD vinyl
tubing from an elevated poly-tank, or water supply, to the top valve located on
the top cap of the Mariotte Tube. Next, the top valve is fully opened, as well
as opening the petcock, also located on the top cap (Figure 3C and 3D).
Proceed filling the Turf-Tec Mariotte tube through the top valve allowing air to
escape through the petcock. (Do not fill the unit while testing unless the bottom
valve is completely closed) After re-filling and before opening the bottom valve
and restart testing, close the top valve and the petcock fully.
Figure 3C
Photo showing the Petcock on the top of the
Mariotte tube
Figure 3D
Photo showing opening the Petcock on the top
of the Mariotte tube to vent air while filling
8.6.4 Install the Mariotte tubes as shown in Figure 3A and Figure 3B in such a
manner that the reference head will be at least 25 mm (1 in.) and not greater
than 150 mm (6 in.) above the soil surface. Select the head on the basis of the
permeability of the soil; the higher heads being required for lower permeability
soils.
8.6.5 Cover the soil surface within the center ring and between the two rings with
splash guards, 75-mm or 3-in. square pieces of burlap or rubber sheet, to
prevent erosion of the soil when the initial liquid supply is poured into the rings.
8.6.6 Use a pail to fill both rings with liquid to the same desired depth in each ring;
do not record this initial volume of liquid. Remove the splash guards.
8.6.7 Start flow of fluid from the IN12-W Mariotte Tubes. As soon as the fluid level
becomes basically constant, determine the fluid depth in the inner ring and in
the annular space to the nearest 2 mm (1/4 in.) using the ruler or tape measure.
Record these depths. If the depth between the inner ring and annular space
varies more than 5 mm (¼ in.), raise the depth gage, or Mariotte tube, with the
shallowest depth.
8.6.9 To prevent flow of fluid from one ring to the other, maintain the liquid level at
the selected head, in both the inner ring and annular space between rings, as
near as possible throughout the test..