Onix Coils

Onix Coil

  • Durable and top-performing composite tubing for underfloor radiant, cold weather installations, and snow melt applications
  • Stays in contact with subfloor for better heat transfer and remains quiet in Staple-Up applications
  • Available in several coil and spool lengths in sizes 3/8 in., 1/2 in., 5/8 in., and 3/4 in.
  • Superior kink-free flexibility makes it easy and fast to install at any temperature

Select a Model

Select options below to identify the UPC, Order Code, and Repair Kit for a specific Onix Coils

Approval/Certification Information

For product-specific approval information, please refer to the product’s specification sheet or ask a Watts representative. For general information regarding any approval certification partners identified in the specification sheet, please visit our certification partners’ websites:


ASSE CSA FM Approvals NSF
UL ULC USC WQA