What does w.c. mean when speaking of natural gas?

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Old 11-29-04, 07:42 PM
Victorious1_1
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What does w.c. mean when speaking of natural gas?

My boiler states that it needs 7" w.c. of natural gas line pressure to operate, what does that w.c. stand for?

Vic
 
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Old 11-29-04, 08:19 PM
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Hello: Vic. Welcome to the do it yourself web site.

W/C means water column. A measurement for very lower pressures.

The 7 inches of W/C is the pressure into the gas control valve. The outlet side is usally 3.5 or 4.0 May be slightly higher in some instances. W/C pressure out should be marked on the gas control valve.
 
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Old 11-29-04, 09:36 PM
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And to put what Sharp Advice said into even greater perspective, atmospheric pressure (14.7 psig) is the same as a water column of 33.9 feet!

So, yes 7" is very low pressure. Actually about 0.253 psig.
 
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Old 11-30-04, 10:57 AM
Victorious1_1
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Thanks for the info guys, it's very much appreciated when experts step forward to turn the lights on in the dark for rookies.

Vic
 
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Old 11-30-04, 12:12 PM
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Thanks for the feedback, we can occasionally find the light switch
 
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