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HAPSITE ER Operating Manual
15 While maintaining steady pressure on the top elbow fitting, finger-tighten the 
bottom nut of the concentrator until tight. (See Figure 3-49.)
Figure 3-49  Tightening the Top and Bottom Nut
16 While continuing to maintain steady pressure on the top elbow, finger-tighten 
the top nut until tight.
Excessive force and/or tightening can cause the fragile 
glass to break.
17 Using a 7/16 in. wrench, turn the bottom nut approximately 1/4 of a turn 
clockwise until tight. (See Figure 3-50.)
Figure 3-50  Using Wrench to Tighten Bottom Nut