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venting air from baseboard

Posted by Harold Kestenholz - Hydronic Network on February 22nd, 2001 03:23 PM
In reply to baseboard heaters by K on February 22nd, 2001 03:13 PM [Go to top of thread]

Some iinstallers put vent elbows at an end of the baseboard with a plug or vant to permit air to leave. Other installers rely upon flushing the air out of the tubing by shutting a valve at the end of the run and opening a boiler drain to flush water through until the water runs clear. Sometimes air enters the system because the water pressure in the system has dropped to the point to allow air into the system. The pressure needs to be increased to a positive 4 psig at the highest radiator before beginning a flushing or venting procedure.

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