New gas water heater, gas adaptor

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Old 02-24-14, 05:22 PM
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New gas water heater, gas adaptor

Thank you for taking the time to read this. I just got a new gas water heater. It has a fourth inch copper gas line running from my main line. My question is do I have to use a flare tip adaptor or can I use an adaptor sans flare tip and maybe use dope to prevent leaks?
 

Last edited by Divided_sum; 02-24-14 at 07:35 PM. Reason: Typo
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Old 02-24-14, 07:45 PM
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Hello and welcome... Are we talking LP?
 
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Old 02-24-14, 08:14 PM
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Mr. Sum, all of the gas connections I've seen have been flare fit. I'm no expert at all but there must me a reason for this.
 

Last edited by Shadeladie; 02-25-14 at 06:17 AM.
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Old 02-25-14, 08:14 AM
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No sir. It's natural gas.
 
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Old 02-26-14, 01:08 AM
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1/4" gas line to a gas fired water heater ? What size WH ? I have never seen one feed with that small of gas line ?

God bless
Wyr
 
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Old 02-26-14, 10:13 AM
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Although I've seen it used many times, I don't believe soft copper tubing is compliant with the fuel gas codes for a natural gas connection. Lawrosa could shed some light on this.
 
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Old 02-27-14, 02:29 AM
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I have seen it used , to . One occasion ( an Uncle ) the chemicals in the gas caused corrosion in the thinnest part of the line . Which was the flare . This resulted in a leak . :-(

I told him and Dad I did not think they should use it . They asked ifould fix it . I said yes , dug out my tubing cutter & flare tool . Cut the old flare off ( there was sufficent slack to re-do this ) and re-flared the end of the copper .

I do not know if copper is approved for propane ?

God bless
Wyr
 
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Old 02-27-14, 08:10 AM
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I remember seeing a number of natural gas fired unit heaters in a warehouse connected with soft copper tubing that stopped working because the gas valves were all plugged. The copper tubing had a silvery looking substance in it that looked like droplets although it was dry. All required new gas valves and the appropriate flex connector and all worked fine thereafter. There is a type of hard copper pipe approved for natural gas with silver soldered fittings, but I cannot tell you the type. I prefer black iron piping.
 
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Old 02-28-14, 02:51 AM
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Me too , with the black iron pipe . I think the new flex gas " hoses " are made of stainless steel ? ( I know they are not hoses , but I could not think of a correct term to call them ? )

God bless
Wyr
 
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