Contact Us
Register | Log In
Catalog > Tubing > Watts Tubing > R-flex > 
Facebook pageLinkedIn pageTwitter page
Cart Summary
Your Cart is Empty
View Cart
 Visa  Mastercard  Discover  American Express
Search
 
 
Navigation
Home
Catalog
Tubing
Watts Tubing
Non-Barrier
Watts Radiant BarrierPEX+
PEX-AL-PEX
Onix
RadiantPERT
R-flex Tubing
R-flex Accessories
R-flex Fittings
Nibco
Electric Floor Heat
SmartTrac
Fittings
Manifolds
Tools & Accessories
Heating System Controls
Radiant Insulation
Water Heaters & Boilers
Books
Services
Specials
SubRay - Discontinued
Info
Estimate Request

Free Radiant Floor Heating Estimates
Free Shipping

Free Ground Shipping on Orders Over $200
Find us on Facebook
RPA Trained - Keeping your project done right
Radiant Professionals Alliance

R-flex

R-flex Header spacer

R-flex | Insulated Piping Systems

Insulated supply and return piping for:

R-flex pipe
  • Hydronic heating
  • Hydronic snow melting
  • District heating
  • Commercial and process piping
  • Geothermal
  • Agricultural piping
  • Biomass heat sources
  • Wood-fired boilers
  • Solar
  • Cooling towers & chilled water systems

A solid proven system.

R-flex is a pre-insulated, flexible, energy-saving PEX piping system with a durable, waterproof outer cover. It consists of a long-lasting PEX carrier pipe or pipes surrounded by thick insulation layers, all contained in a unique double-wall outer casing for maximum protection. The flexibility and light weight of R-flex make it far easier to install than rigid piping systems.

Superior protection.

Surrounding the inner PEX carrier pipe are
several layers of cross-linked polyethylene foam with a closed cellular structure. This unique design provides R-flex with a low water vapor absorption, enhanced R-value insulation, and an excellent resistance to extreme temperatures. Most importantly, R-flex is able to maintain these insulation properties over time. Other
insulation types, such as polyurethane (PUR) foam, can crush when the pipe is bent, causing them to lose their insulative properties.


Barrier PEX offers several advantages.

  • high resistance to corrosion and pressure at high temperatures
  • exceptionally high abrasion resistance
  • superb chemical resistance
  • proven product with excellent longevity at high temperatures

Flexible, fast, and easy.

R-flex derives a unique benefit from the use of the polyethylene foam insulation and the doublewall outer shell; increased flexibility. This feature provides an advantage when running R-flex between buildings, around trench corners, or through wall penetrations.

The art of simplicity.

Traditional carrier pipes, such as copper or black iron, require installers to cut and install transition fittings to work around an obstacle. With R-flex, installers no longer have to cut pipe and add connecting points. R-flex bends around the obstacle.

R-flex Specifications Chart

Specifications (conforms to DIN 16892, SDR-11)
Single Order # Description PEX
ID
PEX
OD
Jacket
OD
Bend
Radius
Coil
Length
Coil
Diameter
Coil
Height
Coil
Weight
Fluid Cap.
/ 100m (328ft)
Insulation
Thickness
Casing
R-Value
81012929 160/40 R-flex 32.6 mm
(1.28")
40 mm
(1.57")
160 mm
(6.30")
350 mm
(13.8")
100 m
(328 ft)
2300 mm
(90.6")
850 mm
(33.50")
232 kg
(512 lbs)
83.00 L
(21.93 gal)
47.5 mm
(1.88")
6.79
81012886 160/50 R-flex 40.8 mm
(1.61")
50.0 mm
(1.97")
450 mm
(17.80")
248 kg
(547 lbs)
131.31 L
(34.69 gal)
42.5 mm
(1.68")
6.07
81012887 160/63 R-flex 51.6 mm
(2.03")
63.0 mm
(2.48")
550 mm
(21.7”)
278 kg
(613 lbs)
208.76 L
(55.15 gal)
37.0 mm
(1.46")
5.27
81012889 200/75 R-flex 61.4 mm
(2.42")
75.0 mm
(2.95")
200 mm
(7.90")
800 mm
(31.5")
1400 mm
(55.20")
416 kg
(917 lbs)
296.67 L
(78.37 gal)
52.0 mm
(2.05")
7.4
81012890 200/90 R-flex 73.6 mm
(2.90")
90.0 mm
(3.54")
1100 mm
(43.4”)
473 kg
(1,043 lbs)
426.02 L
(112.55 gal)
44.0 mm
(1.74")
6.28
81012891 200/110 R-flex 90.0 mm
(3.55")
110.0 mm
(4.33")
1200 mm
(47.3")
564 kg
(1,244 lbs)
638.41 L
(168.65 gal)
34.0 mm
(1.33")
4.84
Dual 81012879 125/2x1 R-flex 0.863"
(21.92 mm)
1.125"
(28.58 mm)
4.90"
(125 mm)
11.80"
(300 mm)
100 m
(328 ft)
82.70"
(2100 m
27.60"
(700 mm)
358 lbs
(162 kg)
19.94 gal
(75.46 L)
1.11"
(28.0 mm)
4.01
81012880 125/2x32 R-flex 26.2 mm
(1.03")
32.0 mm
(1.26")
125 mm
(4.90")
300 mm
(11.80")
2100 mm
(82.70")
700 mm
(27.60")
182 kg
(402 lbs)
107.48 L
(28.40 gal)
22.3 mm
(0.88")
3.18
81012882 160/2x40 R-flex 32.6 mm
(1.28")
40.0 mm
(1.57")
160 mm
(6.30”)
600 mm
(23.70")
2300 mm
(90.60")
850 mm
(33.50")
263 kg
(580 lbs)
166.00 L
(43.86 gal)
34.0 mm
(1.34")
4.84
81012884 200/2x50 R-flex 40.8 mm
(1.61")
50.0 mm
(1.97")
200 mm
(7.90")
800 mm
(31.50")
1400 mm
(55.20")
403 kg
(889 lbs)
262.62 L
(69.38 gal)
46.0 mm
(1.81")
6.57
81012885 200/2x63 R-flex 51.6 mm
(2.03")
63.0 mm
(2.48")
1200 mm
(47.30")
464 kg
(1,023 lbs)
417.52 L
(110.30 gal)
33.0 mm
(1.30")
4.69

For more information see:

Contact us for product selection. We are glad to help.

R-flex Tubing
Watts Radiant R-flex Tubing - Buried Insulated Large Diameter Barrier PEX Pipe | Pexheat.com R-Flex Performance Insulated Burried Tubing Coils. In ground PEX tubing pre-insulated with maximum flexibility and ease of installation.
R-flex Accessories
Watts Radiant R-flex Accessories - Buried Insulated Large Diameter Barrier PEX Pipe System | Pexheat.com R-flex Caps, Plugs, Repair Sleeves, Casings, etc.
R-flex Fittings
Watts Radiant R-flex Compession Fittings - Buried Insulated Large Diameter Barrier PEX Pipe Fittings | Pexheat.com R-flex Brass Compression Fittings:
  • NPT Couplings
  • Repair Couplings
  • Elbows
  • Tees