Hayward Universal H-Series Low NOx Service/Installation: H150FDN H200FDN H25 - Page 23

Very Important, High Pressure Propane Gas Pipe Sizing First Stage, Low Pressure Propane Gas Pipe - p & s heater 400

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23 It is VERY IMPORTANT when installing a propane heater on a 2-stage regulation system to follow the gas line sizing chart below without exception. HIGH PRESSURE PROPANE GAS PIPE SIZING "FIRST STAGE": (Based upon an inlet gas pressure of 10 psig at a pressure drop of 1 psi) Distance from Tank Regulator Outlet to Heater Gas Valve Inlet Model btu/hr input Line Material H150FDP 150,000 Iron Pipe Tubing 0 to 50 ft 1/2" 1/2" H200FDP 200,000 Iron Pipe Tubing 1/2" 1/2" H250FDP 250,000 Iron Pipe Tubing 1/2" 1/2" H300FDP 300,000 Iron Pipe Tubing 1/2" 1/2" H350FDP 350,000 Iron Pipe Tubing 1/2" 1/2" H400FDP 400,000 Iron Pipe Tubing 1/2" 1/2" 50 to 100 ft 100 to 150 ft 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 5/8" 1/2" 5/8" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 5/8" 1/2" 5/8" 1/2" 5/8" LOW PRESSURE PROPANE GAS PIPE SIZING "SECOND STAGE": (Based upon an inlet gas pressure of 11 in-wc at a pressure drop of 0.5 in-wc) Distance from Outlet of 2nd Stage Regulator to Heater Gas Valve Inlet Model btu/hr input Line Material H150FDP 150,000 Iron Pipe Tubing 0 to 10 ft 1/2" 5/8" H200FDP 200,000 Iron Pipe Tubing 1/2" 5/8" H250FDP 250,000 Iron Pipe Tubing 1/2" 3/4" H300FDP 300,000 Iron Pipe Tubing 3/4" 3/4" H350FDP 350,000 Iron Pipe Tubing 3/4" 7/8" H400FDP 400,000 Iron Pipe Tubing 3/4" 7/8" USE ONLY HAYWARD GENUINE REPLACEMENT PARTS Pomona, CA Clemmons, NC Nashville, TN Tel: 908-351-5400 www.haywardpool.com

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Pomona, CA Clemmons, NC Nashville, TN
Tel: 908-351-5400
www.haywardpool.com
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
23
Distance from
Tank Regulator
Outlet to Heater
Gas Valve Inlet
Model
H150FDP
H200FDP
H250FDP
H300FDP
H350FDP
H400FDP
btu/hr input
150,000
200,000
250,000
300,000
350,000
400,000
Line
Material
Iron Pipe
Tubing
Iron Pipe
Tubing
Iron Pipe
Tubing
Iron Pipe
Tubing
Iron Pipe
Tubing
Iron Pipe
Tubing
0 to 50 ft
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
50 to 100 ft
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
5/8"
1/2"
5/8"
100 to 150 ft
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
1/2"
5/8"
1/2"
5/8"
1/2"
5/8"
Distance from
Outlet of 2nd Stage
Regulator to Heater
Gas Valve Inlet
Model
H150FDP
H200FDP
H250FDP
H300FDP
H350FDP
H400FDP
btu/hr input
150,000
200,000
250,000
300,000
350,000
400,000
Line
Material
Iron Pipe
Tubing
Iron Pipe
Tubing
Iron Pipe
Tubing
Iron Pipe
Tubing
Iron Pipe
Tubing
Iron Pipe
Tubing
0 to 10 ft
1/2"
5/8"
1/2"
5/8"
1/2"
3/4"
3/4"
3/4"
3/4"
7/8"
3/4"
7/8"
It is
VERY IMPORTANT
when installing a propane heater on a 2-stage regulation system to follow the gas line sizing chart below without
exception.
HIGH PRESSURE PROPANE GAS PIPE SIZING “FIRST STAGE”:
(Based upon an inlet gas pressure of 10 psig at a pressure drop of 1 psi)
LOW PRESSURE PROPANE GAS PIPE SIZING “SECOND STAGE”:
(Based upon an inlet gas pressure of 11 in-wc at a pressure drop of 0.5 in-wc)