|Tubing outside diameter||1.7" (43 mm)||1.1" (28 mm)|
|Channel diameter||6 - Outer pie channels: nominal 0.4" (10 mm)
1 - Center hex channel: nominal 3/8" (9.5 mm)
|3 - Hex channels: nominal 3/8" (9.5 mm)|
|Channel volume||40 mL/ft 30 mL/ft (center)||30 mL/ft|
|Installation options**||Sand & bentonite backfill Natural formation collapse||Bentonite & sand cartridges Sand & bentonite backfill Natural formation collapse|
|Coil lengths*** (Coil 4 ft dia.)||100 ft (30 m), 200 ft (60 m) & 300 ft (90 m)||100 ft (30 m), 200 ft (60 m) & 500 ft (150 m)|
|Tubing temperature during installation||–15ºC to +35ºC ****|
|Port plug temperature during installation||+15ºC to +35ºC|
|Pressure differential (water levels)||12.5 inch-pounds torqued port plugs are designed to hold 20 psi (50 ft) of head differential.|
* Tubing is MDPE; proprietary mix of HDPE and LDPE products.
** Avoid using 'single lifts' of grout, greater than 50 ft in the unsaturated zone.
*** Each CMT coil measures 1 to 2 ft longer than stated.
**** If air temperature is above +35ºC, use cold water to cool down the tubing at the port before installing the port plug.
Port plugs are tightened to a torque of 12.5 inch-pounds. Plugs in the base, or bottom, of the CMT should be torqued sequentially and incrementally to ensure even expansion.
Gear clamp is tightened to a torque of 12.5 inch-pounds, so guide point can support up to 20 lbs of additional weight (optional).
Port plugs are tightened to a torque of 12.5 inch-pounds.
Hand Tools for CMT System Assembly