AquaStar GWH 1600 P manual For Natural GAS

Installation instructions

FOR NATURAL GAS

Maximum Capacity of pipe in Cubic Feet of Gas per Hour for Gas Pressure of 0.5 Psig or less and a Pressure drop of 0.3 in Water Column (0.75mbar).(Based on a 0.60 Specific Gravity Gas) Btu numbers given in thousands. Copper tubing is prohibited for use with Natural Gas in the Commonwealth of Massachusetts and not recommended elsewhere.

Follow boxed numbers for piping just one GWH 1600 P (example: ¾” B.I. Natural Gas pipe for 20 ft (6.1m). will handle 190,000 btu’s (55.7 kWh). For multiple appliances combine the total btu input load and then refer to applicable chart below.

	Nominal
	Iron						Length of Black Iron Pipe, Feet
	Pipe	Internal
	Size	Diameter
	inches	inches	10	20	30	40	50	60	70	80	90	100	125	150	175	200
3/4		0.824	278	190	152	130	115	105	96	90	84	79	72	64	59	55
1		1.049	520	350	285	245	215	195	180	170	160	150	130	120	110	100
1 1/4		1.380	1050	730	590	500	440	400	370	350	320	305	275	250	225	210

Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet

Tube
size,
inches	EHD*
	10		20	30	40	50	60
1/2	18 EHD 82		58	47	41	37	34
3/4	23 EHD	161	116	96	83	75	68
1	30 EHD 330		231	188	162	144	131
1 1/4	37 EHD 639		456	374	325	292	267

*EHD = Equivalent Hydraulic Diameter. The greater the value of EHD, the greater the gas capacity of the tubing.

FOR LP GAS

Maximum Capacity of Pipe in Thousands of BTU per Hour of Undiluted Petroleum Gases (at 11 inches Water Column Inlet Pressure) (Based on a Pressure Drop of 0.5 Inch Water Column).

N o minal
Iro n pipe						Black Iron Pipe
size						Lenght of pipe, Feet
inches		10	20	30	40	50	60	80	100	125	150	200
	1/2	291	200	160	137	122	110	94	84	74	67	58
	3/4	608	418	336	287	255	231	197	175	155	140	120
	1	1145	787	632	541	480	434	372	330	292	265	227

*EHD = Equivalent Hydraulic Diameter. The greater the value of EHD, the greater the gas capacity of the tubing.

Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet

Tube
size
inches	EHD*
	10		20	30	40	50	60
1/2	18 EHD	129	91	74	64	58	53
3/4	23 EHD 254		183	151	131	118	107
1	30 EHD 521		365	297	256	227	207
1 1/4	37 EHD 971		661	528	449	397	359

Maximum Capacity of Semi-Rigid copper Tubing in Thousands of BTU per Hour of Undiluted Liquefied Petroleum Gases (at 11 inches Water Column Inlet Pressure).

(Based on a Pressure Drop of 0.5 Inch Water Column)

*Source National Fuel Gas Code NFPA 54, ANSI Z223.1 - No Additional Allowance is necessary for an ordinary number of fittings

					Copper (LP gas only)
Outside			Length of Tubing, Feet
diameter
Inch	10	20	30	40	50	60	70	80	90	100
3/8	39	26	21	19	_	_	_	_	_	_
1/2	92	62	50	41	37	35	31	29	27	26
5/8	199	131	107	90	79	72	67	62	59	55
3/4	329	216	181	145	131	121	112	104	95	90

Fig. 14

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