6.1 Attaching Open Tubes

Tools and accessories required: Oetiker pliers, tubing cutter, black electrical tape, rod/broom handle, sand paper.


Figure 6-1 Tools and Accessories Required


Beginning with the deepest Port (Port 1), stand at the borehole holding the spool of tubing(1/2"OD x 3/8"ID or 5/8"OD x 1/2"ID). A broom handle or equivalent pole works well to hold the spool. A second person will 'walk' the end of the tubing to the measured reference mark (Section 4.0). Once the tubing end is pulled to this reference mark, label the tube about 1 ft. (30 cm) from the tubing end. Black electrical tape works well. Use the black tape to wrap the number of bands corresponding to the Port number around the tubing end (i.e. 1 band of black tape represents Port 1). Cut the tubing at the spool.


1/2"OD x 3/8"ID or 5/8"OD x 1/2"ID tubing can be used. The 1/2"OD tubing is clamped directly onto the Port Stem with an Oetiker #14 clamp, while the 5/8"OD tubing fits over a 3" length of 1/2"OD tubing before being clamped to the Port Stem with an Oetiker #17 clamp.


Figure 6-2 Tubing Being Pulled to Reference Mark



Remember to label each tubing/cable end.


Figure 6-3 5/8"OD x 1/2"ID tubing attached over 3" of 1/2"OD x 3/8"ID tubing to Port Stem Using Oetiker #17 Clamp


At the next Port, roll off the tubing to the end of the previous cut tubing length, and cut at this new reference mark. Use this reference for the remaining Ports, so as more Ports are added the tubing and cable ends will meet at the same point. Remember to label each length of tubing as you progress.

Be sure there is a clean cut to the tubing end at the Port. Place one single ear Oetiker #14 clamp over the tubing and push the tubing end onto the stainless steel Port Stem. Using the Oetiker pliers, squeeze the clamp ‘shoulders’ together to securely attach the tubing to the stem.


Figure 6-4 1/2"OD x 3/8"ID tubing attached to Port Stem Using Oetiker #14 Clamp



If using 5/8"OD tubing, a 3" length of 1/2"OD tubing has to be first pushed onto the Port Stem. Then the 5/8"OD tubing is pushed over the 1/2"OD tubing and clamped to the Port Stem with an Oetiker #17 clamp (see Figure 6-3).