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  • BESTFLOW Water CSST
  • Manifolds

Uncoated Stainless Steel Water CSST

Introducing the uncoated BESTFLOW water CSST. It does not have a polyethylene coating and is purely stainless steel. The uncoated BESTFLOW CSST comes in 4 different ID sizes, ranging from 1/2″ to 1-1/4″, and in 3 lengths: 50ft, 100ft, and 150ft. You can be confident in its performance as it is fully certified and approved for use as a water delivery system.

-Lower Labor Costs Than Hard Pipe
-Flexible, Durable, Lightweight
-Corrosion-Resistant
-Patented 3-Step Installation with Quicksnap Fittings
-No Special Tools or Equipment Required

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Models

  • ID

    Part #

    Description

    1/2″

    KW-012-050

    1/2″ ID, 50 ft

    1/2″

    KW-012-100

    1/2″ ID, 100 ft

    1/2″

    KW-012-150

    1/2″ ID, 150 ft

    3/4″

    KW-034-050

    3/4″ ID, 50 ft

    3/4″

    KW-034-100

    3/4″ ID, 100 ft

    3/4″

    KW-034-150

    3/4″ ID, 150 ft

    1″

    KW-100-050

    1″ ID, 50 ft

    1″

    KW-100-100

    1″ ID, 100 ft

    1″

    KW-100-150

    1″ ID, 150 ft

    1-1/4″

    KW-114-050

    1-1/4″ ID, 50 ft

    1-1/4″

    KW-114-100

    1-1/4″ ID, 100 ft

    1-1/4″

    KW-114-150

    1-1/4″ ID, 150 f

Technical Data

CERTIFICATIONS, APPROVALS, LISTINGS, & COMPLIANCE

  • CSA
  • UPC / NSF 61 Compliant for Safe Drinking Water
  • NSF 372 Compliant : Lead-Free
  • ASTM A240 Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip for Pressure Vessels and for General Applications
  • ASTM D3350 Polyethylene Injection and Extrusion Material
  • ASTM DS-561 Metals and alloys in the Unified Numbering System
  • ASME B1.20.1 Pipe Threads, General Purpose (Inch)
  • IAPMO IGC-233 Corrugated Stainless Steel Hot- and Cold- Water Distribution Systems


 

 

 

Product Testing

Hydrostatic TestInternal hydrostatic pressure increased to 220 ± 7 psi (1516 ± 48 kPa) or 1.5 times the rated pressure, whichever is greater, at the temperature of 68° ± 5° F (20° ± 3° C) for a period of 5 minutes.
Hydrostatic Burst TestInternal hydrostatic pressure increased to 588 ± 7 psi (4051 ± 48 kPa) or 4 times that rated pressure, whichever is greater, at the temperature of 68° ± 5° F (20° ± 3° C) for a period of 5 minutes.
Bending TestBending motion being applied uniformly at the rate of 5-6 cycles per minute.
Hydraulic Shock TestSubjected to a hydraulic shock for 2,000 cycles at 68° F ± 5° F. The Hydraulic shock shall consist of a sudden increase in pressure from 50 psi (345 kPa) to 284 psi (1967 kPa) lasting 1 second.
Vibration TestFilled with water. The amplitude of vibration was 0.2 inches and the frequency was 25 Hz for 3 hours. 
Flattening TestPressed to 2/3 D height of the outer diameter until the tube is flat. No signs of cracks or leakage shall be found.
Impact TestAn impact force of 9.76 to 15.19 lbf·ft was applied to various fitting sizes by using a hammer.
Toxicity TestConforms to NSF/ANSI 61 & 372

Technical Data

CSST MaterialStainless Steel 304 (ASTM A 240)
CoatingPolyethylene (ASTM D 335)
Coating ColorUncoated, Blue PE, or Red PE
Sizes1/2″,  3/4″,  1″,  1-1/4″
Inner Diameter0.55″, 0.83″, 1.03″, 1.26″
CSST Thickness0.010″, 0.012″
PE Coating Thickness0.02″
Available Lengths50, 100, 150 ft / Roll (custom lengths available)
Burst Pressure588 psi with fittings attached
Rated Pressure147 psi at 212˚ F
Maximum Working Pressure1/2″220 psi
3/4″176 psi
1″147 psi
1-1/4″110 psi
Minimum Bend Radius

Size

Recommended

1/2″

3″

3/4″

3″

1″

3″

1-1/4″

5″

1-1/2″

6″

2″

8″

Friction Loss Data

GPM

Nominal Size (ID)

1/2″

3/4″

1″

1-1/4″

1-1/2″

2″

1

0.032

0.004

0.002

0.001

0

0

2

0.114

0.015

0.005

0.002

0.001

0

3

0.241

0.032

0.012

0.004

0.001

0

4

0.41

0.055

0.02

0.008

0.002

0.001

5

0.619

0.083

0.03

0.011

0.003

0.001

6

0.867

0.117

0.042

0.016

0.004

0.001

7

1.153

0.155

0.055

0.021

0.005

0.002

8

1.476

0.199

0.071

0.027

0.007

0.002

9

 

0.247

0.088

0.034

0.009

0.002

10

 

0.301

0.107

0.041

0.01

0.003

15

 

0.637

0.226

0.087

0.022

0.006

20

 

1.084

0.386

0.147

0.038

0.011

25

 

1.638

0.583

0.223

0.057

0.016

30

 

 

0.816

0.312

0.08

0.023

35

 

 

1.086

0.415

0.106

0.03

40

 

 

 

0.531

0.136

0.039

45

 

 

 

0.66

0.169

0.048

50

 

 

 

 

0.206

0.059

60

 

 

 

 

0.288

0.082

70

 

 

 

 

0.383

0.11

80

 

 

 

 

 

0.14

90

 

 

 

 

 

0.175

100

 

 

 

 

 

0.212

110

 

 

 

 

 

0.253

120

 

 

 

 

 

0.297

  1. Table is based on the Hazen-Williams formula.
  2. Fluid velocities in excess of 5 – 8 ft/sec are not recommended.
  3. Friction loss values shown are for the flow rates that do not exceed a velocity of 8 ft/sec.
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