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Posted by ransley on May 1, 2009, 7:18 pm
> Tim wrote:
> > I am getting different answers on this one in the field and I'd like a
> > little help.
> > I need to supply gas to a new hybrid water heater. According to the
> > manufacturer, it requires a 3/4" input line.
> > The gas line comes directly from the gas meter via a 1" line to the
> > water heater closet. There, it goes into a Tee. The Tee is a 1" (from
> > the meter), 3/4" that feeds the rest of the house (furnace and stove),
> > and 1/2" that feeds the existing water heater. Some say I have to remov=
e
> > the Tee and go with one that gives me a 3/4" line to the rest of the
> > house and a 3/4" line to the water heater. Others say I can just put a
> > bushing on the 1/2" line, taking it up to 3/4" and I'll be fine.
> > I've tried talking to the manufacturer and they do not want to get
> > involved in "construction matters" (liability worries).
> > This is in California (1/4 pound pressure gas).
> > Any thoughts? Go with a new tee or bush up the old one? Or any other id=
ea?
> > Thanks
> > Tim
> just put the 1/2" line on the water heater. Especially for that short
> distance. =A0Sounds like your "T" is within a couple of feet of the
> heater. You'd need a dam big heater to require any bigger line. =A0Most
> water heaters can be run on a 3/8" line.- Hide quoted text -
> - Show quoted text -
"Just Put 1/2" when mnfg says 3/4", no wonder you cant get a tankless
to work, your answer is a hacks answer. Did it ever occure to you his
Hybrid needing 3/4 , needs 3/4" and is probably tankless. The only
Tankless ive seen leave you cold was put in by hacks undersizing the
gas. In reality after checking it with a manometer with competing
apliances on full and calculating winter reductons, he may just need
major meter and line work. Right , just use 1/2", what a joke.
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Posted by ransley on May 1, 2009, 7:10 pm
> I am getting different answers on this one in the field and I'd like a
> little help.
> I need to supply gas to a new hybrid water heater. According to the
> manufacturer, it requires a 3/4" input line.
> The gas line comes directly from the gas meter via a 1" line to the water
> heater closet. There, it goes into a Tee. The Tee is a 1" (from the meter=
),
> 3/4" that feeds the rest of the house (furnace and stove), and 1/2" that
> feeds the existing water heater. Some say I have to remove the Tee and go
> with one that gives me a 3/4" line to the rest of the house and a 3/4" li=
ne
> to the water heater. Others say I can just put a bushing on the 1/2" line=
,
> taking it up to 3/4" and I'll be fine.
> I've tried talking to the manufacturer and they do not want to get involv=
ed
> in "construction matters" (liability worries).
> This is in California (1/4 pound pressure gas).
> Any thoughts? Go with a new tee or bush up the old one? Or any other idea=
?
> Thanks
> Tim
How many Btu is this "hybrid" and whats a Hybrid, is it Tankless? 3/4
gas is a monster commercial tank, My 16 unit apartment tank has 3/4"
gas going to it, so I will assume its a tankless and give you my
experiance on my tankless. If you dont get full required gas flow you
wont get 100% output and will be pissed all winter. Regardless of what
you see in your line size a Manometer must be used to verify gas
supply, some meters may need adjustment or replacing, in winter and
with other apliances on gas flow is reduced and you must figure that
in. In winter my total supply can go down 10-15%, you must plan on
that. 3/4" is recomended, and after so many feet 1" is needed, its
standard and tabled. If its Tankless gas flow must be tested or you
will enter the ranks of "tankless sucks" by guessing and under
supplying it. Sure it may work today, but on the coldest day around
Christmas when every neighbor has every gas apliance running full bore
you may have a cold shower. Manoneters are cheap, and the gas co can
help you on winter pressure reduction estimates. I would not hook to
1/2" anything.
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Posted by Tim on May 14, 2009, 12:18 am
This is a true hybrid. Look up the "Eternal Water Heater". That is it's REAL
name. The Eternal system is a very good heater and puts out something like
26 gallons a minute. My homeowner is getting the larger of the two systems.
Most people have never seen anything like this system.
> I am getting different answers on this one in the field and I'd like a
> little help.
> I need to supply gas to a new hybrid water heater. According to the
> manufacturer, it requires a 3/4" input line.
> The gas line comes directly from the gas meter via a 1" line to the water
> heater closet. There, it goes into a Tee. The Tee is a 1" (from the
> meter),
> 3/4" that feeds the rest of the house (furnace and stove), and 1/2" that
> feeds the existing water heater. Some say I have to remove the Tee and go
> with one that gives me a 3/4" line to the rest of the house and a 3/4"
> line
> to the water heater. Others say I can just put a bushing on the 1/2" line,
> taking it up to 3/4" and I'll be fine.
> I've tried talking to the manufacturer and they do not want to get
> involved
> in "construction matters" (liability worries).
> This is in California (1/4 pound pressure gas).
> Any thoughts? Go with a new tee or bush up the old one? Or any other idea?
> Thanks
> Tim
How many Btu is this "hybrid" and whats a Hybrid, is it Tankless? 3/4
gas is a monster commercial tank, My 16 unit apartment tank has 3/4"
gas going to it, so I will assume its a tankless and give you my
experiance on my tankless. If you dont get full required gas flow you
wont get 100% output and will be pissed all winter. Regardless of what
you see in your line size a Manometer must be used to verify gas
supply, some meters may need adjustment or replacing, in winter and
with other apliances on gas flow is reduced and you must figure that
in. In winter my total supply can go down 10-15%, you must plan on
that. 3/4" is recomended, and after so many feet 1" is needed, its
standard and tabled. If its Tankless gas flow must be tested or you
will enter the ranks of "tankless sucks" by guessing and under
supplying it. Sure it may work today, but on the coldest day around
Christmas when every neighbor has every gas apliance running full bore
you may have a cold shower. Manoneters are cheap, and the gas co can
help you on winter pressure reduction estimates. I would not hook to
1/2" anything.
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