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System Specifications

Maximum Pressure: 
Slim Line Systems – 125psi (8 .6 bar), Steam Max Models S1, S1L, 

S3 Lime Scale, S3L Lime Scale, S3L+ Lime Scale, and S3
Big Blue Systems – 90 psi (6 .2 bar), Steam Max Models S1BBL, 

S1BBLHF, and S3L+
Maximum Temperature: 100°F (38°C)
pH 6 .5 to 8 .5
Hardness (maximum for systems containing OneFlow) 75 grains 

(1282 ppm CaCO3)
Chlorine < 2ppm
Iron (maximum) 0 .3 mg/l
Manganese (maximum) 0 .05 mg/l
Copper (for systems containing OneFlow) < 0 .1 mg/l
Oil & H2S- None allowed
Polyphosphate (for systems containing OneFlow)- None allowed
Silica (maximum for systems containing OneFlow)  10 ppm
For all other feed water quality requirements abide by the current 

USEPA Safe Drinking Water Act standards .
Inlet/Outlet Connections: 3/8" (10mm) NPT for Slimline Models, 3/4" 

(20mm) NPT for Big Blue Models .
Maximum Flow Rate: 

System Flow Rate

System Model

Flow Rate

Steam Max-S1

1 GPM

Steam Max-S1L

2 GPM

Steam Max-S1BBL

4 GPM

Steam Max-S1BBLHF

6 GPM

Steam Max-S3 Lime Scale

1 GPM

Steam Max-S3L Lime Scale

2 GPM

Steam Max-S3L+ Lime Scale

2 GPM

Steam Max-S3

1 GPM

Steam Max-S3L+

2 GPM

Steam Max line is available in different configurations depending 

upon filtration and flow requirements . 
Slimline models use 2

¾

 (70mm) in diameter filters and are available 

in either 10

"

 (250mm) or 20

"

 (500mm) length options . The Slimline 

models are equipped with 3/8

"

 (10mm) NPT fittings .

Big Blue models use 4½ in diameter filters and are available in either 

10

"

 (250mm) or 20

"

 (500mm) length options . The Big Blue models 

are equipped with 3/4

"

 (20mm) NPT fittings .

Teflon

®

 is a registered trademark of E .I . DuPont de Nemours & Company .

Replacement Filters

System Replacement Filters

System Model

Filter Ordering Code

Frequency

Description

Steam Max-S1

DOR-OF110RM

12 Months

10" OneFlow Anti-Scale Cartridge

Steam Max-S1L

DOR-OF120RM

12 Months

20" OneFlow Anti-Scale Cartridge

Steam Max-S1BBL

DOR-OF140RM

12 Months

20" OneFlow Anti-Scale Cartridge

Steam Max-S1BBLHF OFTWHRM

12 Months

20" OneFlow Anti-Scale Cartridge 

Steam Max-S3

Lime Scale

STMMAX-S3S-PM

All Filters for System Maintenance

HSR-S-SED-5M

6 Months

10" Sediment Pre Filter

STMAXR-S-CB

6 Months

10" Carbon Block

STMAXR-S-ACSC

6 Months

10" Phosphate Scale Control

Steam Max-S3L

Lime Scale

STMMAX-S3L-PM

All Filters for System Maintenance

HSR-S-SED-5M

6 Months

10" Sediment Pre Filter

STMAXR-L-CB

6 Months

20" Carbon Block

STMAXR-S-ACSC

6 Months

10" Phosphate Scale Control

Steam Max-S3L+

Lime Scale

STMMAX-S3LPS-PM

All Filters for System Maintenance

HSR-S-SED-5M

6 Months

10" Sediment Pre Filter

STMAXR-L-CB

6 Months

20" Carbon Block (2)

STMAXR-S-ACSC

6 Months

10" Phosphate Scale Control

Steam Max-S3

STMMAX-S3SS-PM

All Filters for System Maintenance

HSR-S-SED-5M

6 Months

10" Sediment Pre Filter

STMAXR-S-CB

6 Months

10" Carbon Block

DOR-OF110RM

12 Months

10" OneFlow Anti-Scale Cartridge

Steam Max-S3L+

STMMAX-S3LP-PM

All Filters for System Maintenance

HSR-S-SED-5M

6 Months

10" Sediment Pre Filter

STMAXR-L-CB

6 Months

20" Carbon Block (2)

DOR-OF140RM

12 Months

20" OneFlow Anti-Scale Cartridge

Filter Cartridge Life Span

Filter cartridges should be changed at end of filter life, due to lack of 

filtering performance, or whenever a 15 psi pressure drop or greater is 

experienced during normal operation,

whichever comes first .

Please note:

 Cartridge capacities are estimates and may be less 

depending on incoming water quality . 

Filter Placement Reference

The replacement filter cartridges are to be installed from left to right, 

in any given system, as they appear in the above chart from top to 

bottom respectively . 

Example: Steam Max-S3 will have a HSR-S-SED-5M in the left hous-

ing, a STMAXR-S-CB in the middle housing and a DOR-OF110RM in 

the right housing .    

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