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P/N 472089 Rev. E 4-19-05
12
GAS PIPE SIZING
Table 2.
“RESIDENTIAL” NATURAL GAS 2 STAGE REGULATION
In many Natural gas line installations, the gas supplier and/or installer may utilize a two stage regulation
process where by at the streets main gas supply they will install the first stage gas regulator, which would
be at a higher pressure. This higher pressure is usually set at 2 psi or 5 psi and can be for long distances
and in a much smaller pipe size. Then within a short distance of the pool heater, generally around
24 inches, they will install a second regulator, which is the second stage. This second stage regulator
would be set at the minimum operating pressure for the heater. For “Natural Gas Pentair Pool Heaters”
the minimum is 7 inches W.C.
See “Gas Pressure Requirement Charts”
Table 3.
Table 4.
SNOITCENNOCENILSAGROFGNIZISEPIP
HTGNELEPIPTNELAVIUQEMUMIXAM
).tF(
tooFcibuCrep.U.T.B0001tasaGlarutaN
LEDOM
”2/1”4/3”1”4/1-1”2/1-1”2”2/1-2
TANTANTANTANTANTANTAN
002-’03’521’054 ---
052-’02’07’052’006--
003-’01’05’002’004--
004--’02’001’002’004-
gniziSepiPsaG"erusserPhgiH"enOegatS
.TF.UCreP.U.T.B0001@ISP2
HTGNELEPIPTNELAVIUQEMUMIXAM
ledoM.tF05ot0.tF001ot05.tF051ot001
003hguorht002.ni2/1.ni2/1.ni2/1
004.ni4/3.ni4/3.ni4/3
.TF.UCreP.U.T.B0001@ISP5
004hguorht002.ni2/1.ni2/1.ni2/1
gniziSepiPsaG"erusserPwoL"owTegatS
.C.W.ni7tates2egatS
HTGNELEPIPTNELAVIUQEMUMIXAM
ledoM.tF01ot0.tF02ot01
003hguorht002.ni4/3.ni4/3
004.ni4/3.ni1
.C.W.ni7tates2egatS
004hguorht002.ni4/3.ni1
Section III. Installation