From: email@example.com (SKRAUTDOG) Organization: America Online, Inc. (1-800-827-6364) Date: 19 Mar 96 00:44:06 References: 1
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I'm an aircraft tech. This is a overboard water drain for the lav sink and galley drain. The purpose of heating this drain is to prevent ice from forming. It is heated electrically. Most of these types of drains are turned on and off via a switch that sences when the aircraft is on the ground or in the air.