At 05:30 PM 1/8/2007, Pensioner wrote... >and about 5" or so up each side of the "U". Noticing that the water >level >in each side of the U is essentially the same, mark the tubing with >some >tape at the water level on the open side of the U (not connected to >the >tank). Put another piece of tape 11 inches +/- 1/16" above this >mark. You >now have a 11 in-H20 calibrated tool Not quite. 11" pressure is an 11" differential when measured with a manometer. You should have enough of a "U" so there's always some water on the "low" side. If the water goes up on one side by 11", the other side will lower by 11". Your description will result in a pressure of 22" H20. You want to make a mark at 5.5" above the static level, which is the same as an 11" differential. |
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