• 3/8 in. Watts Slab PEX
  • 1/2 in. Watts Slab PEX
  • 5/8 in. Watts Slab PEX
  • 3/4 in. Watts Slab PEX
  • 1 in. Watts Slab PEX
  • 1-1/4 in. Watts Slab PEX
  • 1-1/2 in. Watts Slab PEX
  • 2 in. Watts Slab PEX

Watts RadiantPEX+ Slab Heating PEX Tubing

Watts Logo

American made tubing for quality reliable systems.

RadiantPEX+ tubing with EVOH (oxygen barrier) is a 4-layer tubing used for radiant heating, snow melting, and distribution piping. This cross-linked tubing offers high flexibilty, high temperature resistance, and long life. It can be used with CinchClamps, CrimpRings, and Compression fittings. The extra low-friction outer layer makes it easier to pull through joists, reduces expansion noise, and protects the oxygen barrier against job-site abuse. RadiantPEX (3-layer) and RadiantPEX+ is manufactured to ASTM F-876 and F-877 and to SDR9 dimensions and carries a 30-year warranty for residential and commercial heating and snow melting applications.

Watts Heating PEX Section ViewFeatures

  • Manufactured to ASTM F-876 and F-877 and to SDR9 dimensions

  • Highly flexible and versatile cross-linked polyethylene tubing with oxygen barrier

  • Can be used with CinchClamps, CrimpRings, and Compression fittings

  • For radiant heating, cooling, snow melting, and distribution piping

 Free Estimates

Watts RadiantPEX+ Selection Table

Nominal IDODWall ThicknessAvg. IDBend RadiusVolume gal/100 ft.Material
3/8 in..500 in..070 in..350 in.4 in..50 gal.Radiant PEX+
1/2 in..625 in..070 in..485 in.5 in..92 gal.Radiant PEX+
5/8 in..750 in..088 in..584 in.6 in.1.34 gal.Radiant PEX+
3/4 in..875 in..097 in..681 in.7 in.1.84 gal.Radiant PEX+
1 in.1.125 in..125 in..875 in.9 in.3.04 gal.Radiant PEX+
1-1/4 in.1.375 in..153 in.1.069 in.11 in.4.53 gal.Radiant PEX
1-1/2 in.1.625 in..181 in.1.263 in.13 in.6.32 gal.Radiant PEX
2 in.2.125 in..236 in.1.653 in.17 in.11.15 gal.Radiant PEX
Watts PEX Tubing

3/8 in. Watts Slab PEX

Small, cheap and flexible. Carries a lot of heat for it's size.

Watts PEX Tubing

1/2 in. Watts Slab PEX

The backbone of the industry. Perfect balance of price, length and flexibility.

Watts PEX Tubing

5/8 in. Watts Slab PEX

For when you need a little more length, heat or flow.

Watts PEX Tubing

3/4 in. Watts Slab PEX

For large areas. Light commercial slabs benefit from the extra length and heat

Watts PEX Tubing

1 in. Watts Slab PEX

For large areas. Light commercial slabs benefit from the extra length and heat

Watts PEX Tubing

1-1/4 in. Watts PEX

PEX-A Large diameter for supply runs to manifolds.

Watts PEX Tubing

1-1/2 in. Watts PEX

PEX-A Large diameter for supply runs to manifolds.

Watts PEX Tubing

2 in. Watts PEX

PEX-A Large diameter for supply runs to manifolds.

PB032061-600
3/8 in.-600 ft. Coil Watts Radiant BarrierPEX+
409.19 409.19 USD
PB032081-100
1/2 in.-100 ft. Coil Watts Radiant BarrierPEX+
139.32 139.32 USD
PB032081-1000
1/2 in.-1000 ft. Coil Watts Radiant BarrierPEX+
1,382.23 1382.23 USD
PB032081-2
1/2 in.-2 ft. Sample, Watts Radiant Barrier PEX+
0.00 0.0 USD
PB032081-250
Watts Radiant 1/2 in. RadiantPEX+ x 250 ft. Coil
346.77 346.77 USD
PB032081-300
1/2 in.-300 ft. Coil Watts Radiant BarrierPEX+
415.52 415.52 USD
PB032081-500
Watts Radiant 1/2 in. RadiantPEX+ x 500 ft. Coil
691.72 691.72 USD
PB032081-600
1/2 in.-600 ft. Coil Watts Radiant BarrierPEX+
829.82 829.82 USD
PB032101-1000
Watts Radiant 5/8 in. RadiantPEX+ x 1000 ft. Coil
1,733.26 1733.26 USD
PB032101-1200
5/8 in.-1200 ft. Coil Watts Radiant BarrierPEX+
2,080.04 2080.04 USD
PB032101-300
5/8 in.-300 ft. Coil Watts Radiant BarrierPEX+
520.77 520.77 USD
PB032101-400
Watts Radiant 5/8 in. RadiantPEX+ x 400 ft. Coil
694.16 694.16 USD
PB032101-500
5/8 in.-500 ft. Coil Watts Radiant BarrierPEX+
867.54 867.54 USD
PB032101-600
5/8 in.-600 ft. Coil Watts Radiant BarrierPEX+
1,041.54 1041.54 USD
PB032121-100
3/4 in.-100 ft. Coil Watts Radiant BarrierPEX+
200.76 200.76 USD
PB032121-1000
3/4 in.-1000 ft. Coil Watts Radiant BarrierPEX+
2,002.77 2002.77 USD
PB032121-1200
3/4 in.-1200 ft. Coil Watts Radiant BarrierPEX+
2,401.26 2401.26 USD
PB032121-300
3/4 in.-300 ft. Coil Watts Radiant BarrierPEX+
601.08 601.08 USD
PB032121-500
3/4 in.-500 ft. Coil Watts Radiant BarrierPEX+
1,002.60 1002.6 USD
PB032121-600
3/4 in.-600 ft. Coil Watts Radiant BarrierPEX+
1,202.15 1202.15 USD
PB032161-100
1 in.-100 ft. Coil Watts Radiant BarrierPEX+
336.74 336.74 USD
PB032161-300
1 in.-300 ft. Coil Watts Radiant BarrierPEX+
1,008.69 1008.69 USD
PB032161-600
1 in.-600 ft. Coil Watts Radiant BarrierPEX+
2,016.16 2016.16 USD
PB032121-4
3/4 in. - 4 ft. Stick Watts Radiant Barrier PEX+
12.94 12.94 USD