Houston
i was reviewing install with natural gas plumber about running line for gen 20kw.

the gas util company said they would upgrade to larger meter for one time fee $350 ...

which was ok as part of budget ...

but plumber said once i go to high preasure large volume meter ,,,


then he would have to install a new low presure meter for house on my cost ,,, then he would have to go thru house confirming all gas equip is up to current codes .. preasure test ect ,,, ect ...

getting everything permitted and up to code for city of houston on exist house.

so lots more $$$ ,,, than just connecting to low preasure gas meter ...

the 20 kw install was already pushing my budget,, the extra money for high volume high preasure gas meter install pushes it over the budget..

looks like no central ac on the generator ..

probably 10 kw now ... i am cking with gas util company on max gas flow on exist meter.

any one else run into high preasure vs low preasure gas meters for homes ?

ok, thanks
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Skip Douglas SkipD
My 16 kW 5416 generator runs on the same pressure as the rest of the house (roughly 7 inches of water pressure), so even though I needed a larger capacity meter, the house and generator are connected to the same meter and regulator.

Nothing was required in terms of inspections, etc., to do the meter upgrade. The Houston government may be looking for ways to gain income, of course.
Skip Douglas
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Ira
Houston...sent you a PM.
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cstroh
Houston;8949 wrote:
i was reviewing install with natural gas plumber about running line for gen 20kw.

the gas util company said they would upgrade to larger meter for one time fee $350 ...

which was ok as part of budget ...

but plumber said once i go to high preasure large volume meter ,,,


then he would have to install a new low presure meter for house on my cost ,,, then he would have to go thru house confirming all gas equip is up to current codes .. preasure test ect ,,, ect ...

getting everything permitted and up to code for city of houston on exist house.

so lots more $$$ ,,, than just connecting to low preasure gas meter ...

the 20 kw install was already pushing my budget,, the extra money for high volume high preasure gas meter install pushes it over the budget..

looks like no central ac on the generator ..

probably 10 kw now ... i am cking with gas util company on max gas flow on exist meter.

any one else run into high preasure vs low preasure gas meters for homes ?

ok, thanks


I just installed a 20 kw in houston and ran roughly 165 ft -1.5 inch line to meter. I had the the gas company upgrade the meter for higher flow ($350) but stayed with the 7 in water pressure. It took some convincing cause the people at the gas company automatically assume if you need more flow you need to go to a higher pressure.
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Houston
cstroh;8992 wrote:
but stayed with the 7 in water pressure. It took some convincing cause the people at the gas company automatically assume if you need more flow you need to go to a higher pressure.


hi cstroh,

thanks so much for comments,

i have been getting so many different answers on the gas install requirements from plumbers and city and util company ...

i appreaciate comments what really worked for you ..

the util company indicated ,,, my exist meter , puts out 175 CF ,, at 4 to 5 inches water ...

so i looked at 10kw gen specs ,,, it looks like requires 5-7 water inches gas preasure.

so now not sure even if i go with small gen set (no central ac load) if it would even work in houston with exist meter . we have a 60' gas pipe run.

ok, thanks, joe
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Skip Douglas SkipD
Download and read this [url=http://www.mygenerac.com/PublicPDFs/0172610SBY.pdf][U][COLOR=Blue]Generac Generator Sizing Guide[/COLOR][/U][/url] and this very informative [url=http://www.propane-generators.com/natural-gas-chart.htm][U][COLOR=Blue]Natural Gas Generator Pipe Size Chart[/COLOR][/U][/url]. You will find the combination of the two documents very useful.
Skip Douglas
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johnc
H: If your existing meter supplies hi pressure gas into the house there will be a pressure regulator in the main line in the basement before the gas line gets to your furnace and water heater, dryer, stove. I just teed off the hi pres. line in the basement before the existing pres. reg. , ran new line to the gen. and installed a dedicated pressure regulator for the gen. Regulator cost about $20. Do you trust that plumber? What's his part time job, selling beach front property overlooking the swamp?
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Houston
wow ,,, $20 for gas regulator ,,

thanks for shedding some light on the cost John , i will be looking into another the plumber contractor.

thanks joe
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Houston
Skip... great links ,,,

the easy to use gas pipe sizing really helps..

thanks again, joe
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johnc
Test post, having problems posting maybe
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johnc
I'll try this one more time, tired of having my posts wiped out
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johnc
Joe: Did some gas pressure tests tonite. Hope these results are helpful and may somewhat apply to you. Have hi pressure gas supplied to house, 1" gas line from meter into basement. Don't know what pressure gas co. supplies, never checked it. Figure they could boost it somewhat if needed. Posting this now, to see if it sticks.
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johnc
OK so far. My house, avg. size, no mansion. Gas supplies, 70,000 input btu furnace, 40,000 input btu water htr., gas dryer ( not included in test).
1" gas line into house then reduces to 3/4" into gas pressure regulator to supply household appliances. Gas pressure at furnace and water htr. is 10" w.c. (water column).
As previously posted, I teed into the 1" hi pres. main line in the basement for the generator feed. Ran 10 ft. 1" pipe then reduced to 3/4". Ran 25 ft. of 3/4 to the gen. Pipe included a dedicated pressure regulator, dirt leg, with 6 ells. Don't know what the equivalent length in linear feet is for an ell is, but assume 1.5 ft/ ell, therefore 30 to 35 ft of 3/4 pipe to the gen. Posting this now.
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johnc
Test 1: 13kw gen. Turn on gen., 5.5 " w.c. running. No drop in gas pressure to furnace and water htr, both off.

Test 2: Gen. on, furnace on, water htr on. (max load) Gas pres. still 5.5" to gen. Pressure to furnace and water htr. dropped to 8.5" w.c. No problem here. Still plenty of gas to both. Conducted other scenarios, but nothing to worry about.
Hope that helps. Do you need a bigger meter? Gas Co. should be able to inform you honestly. Maybe this info helped, so you may be able to know if a crooked plumbing contractor is trying blow smoke up your ass, then you will be able tell him to kiss yours.
Sorry about multiple posts but internet kept screwing up
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d11gnccer
Houston;9005 wrote:
wow ,,, $20 for gas regulator ,,


Count on 80 bucks. You want to make sure you install a vented style regulator that can handle the start up flow needed by the generator. Some of the cheap "maxitrol" style regulators aren't the best solution for generator applications.
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