INDUSTRIES WE SERVE
Radiant Heat Tubing & Manifold Fabrication for OEMs
At a glance:
CERTIFICATION
ISO 9001:2015 certified
FOUNDED ERA
Founded 1959
CAPABILITIES USED
Tube bending, end forming, welding/brazing, finishing
VOLUMES
Low-volume custom assemblies through repeatable runs
LOCATION
South Bend, Indiana
WHAT CURTIS DOES FOR RADIANT HEATING
Curtis Products bends and fabricates radiant heat tubing into manifolds, coils, and distribution assemblies for hydronic and radiant heating OEMs. To be clear about what that means: we are a metal tube shop. We bend and form copper, steel, and stainless tubing — the metal side of a hydronic system — not the plastic PEX that runs under a residential floor. If you are an equipment manufacturer building the boiler, the manifold station, the snowmelt loop, or the heat-transfer assembly a radiant system depends on, that is the work this shop has done since the 1950s.
Whether you are building a manifold for a commercial hydronic loop, a formed coil for a heat exchanger, or a run of radiant heating tubes that has to route cleanly through a piece of equipment, the tube has to bend without wrinkling, seal at every joint, and hold tolerance so it drops into your assembly the first time. For an OEM part, that precision is the whole job, not an afterthought.
PROCESS & CAPABILITIES
Every radiant heat tubing job starts with a print, or with a sample part if a print does not exist yet. We bend copper, steel, and stainless tubing from 1/8 inch to 3 inch OD using manual fixture bending, power fixture bending, or CNC rotary bending, matching the method to the tolerance, radius, and volume the part calls for. Radiant heating manifold fabrication usually pulls in more than a bend: end forming to seat each port against its fitting — ORFS, flaring, flanging, swaging, sizing, expanding, coining — plus welding or brazing where a joint has to be permanent.
Our welding and brazing group joins mid-to-large diameter steel, stainless, and aluminized steel tube using manual and robotic MIG welding plus torch, hand, and induction brazing, every process built to meet or exceed AWS requirements. Custom radiant heating coils — tight, repeatable wraps for heat-transfer surfaces — run through the bending method that holds the wall and radius the design needs. When a manifold or coil assembly needs corrosion protection, finishing options include zinc plating, Galfan, e-coating, powder coating, anodizing, tin dip coating, phosphate coating, and autophoretic plating, chosen for the environment the part will see.
Because bending, forming, welding, and finishing all sit under one roof, a hydronic heating tubing assembly can go from raw tube to a finished, ready-to-install part without leaving the building or changing vendors between operations.
WHY OEMS PICK A SHOP THAT'S BEEN DOING THIS SINCE THE 1950S
Curtis Products has built formed tubing assemblies since the fall of 1959, when Curtis Heckaman won a contract to supply short-run, formed tubing after no other manufacturer could meet the customer's quality and delivery requirements. The company is now in its third generation of family management, ISO 9001:2015 certified, and runs a quality process built around prevention — receiving, in-process, and final inspections that document compliance before a part ships.
For an OEM sourcing radiant heating manifold fabrication or a run of custom coils, that history buys something specific: on-time delivery, design expertise, and competitive pricing on parts where a single leaking joint scraps the whole assembly. Launch planning tools like Team Feasibility Commitment, Design Review, and Mistake Proofing get applied before a new part reaches full production, inside 254,000 square feet of dedicated plant space in South Bend, Indiana. Curtis serves OEMs across the Chicagoland, South Bend, Detroit, Milwaukee, and Cincinnati areas and beyond, where on-time delivery and design expertise matter as much as the bend itself.
RADIANT HEAT TUBING, NOT RESIDENTIAL PEX
It is worth stating plainly, because the search term is crowded: Curtis is not a supplier of PEX tubing for residential radiant floors. We do not sell rolls of plastic tube, and we do not do floor installs. What we do is bend and fabricate metal radiant heat tubing — copper, steel, stainless — into the manifolds, coils, and assemblies that hydronic and radiant heating equipment is built from. If that is the side of the system you are sourcing, send a print or a sample through our quote request page and Curtis engineers will respond with design feedback and pricing based on material, tolerance, and volume. If you need bending on its own, see our tube bending services; if the assembly moves fluid, see fluid conveyance systems.
FAQs
Does Curtis supply PEX tubing for residential radiant floors?
No. Curtis is not a residential PEX supplier — we do not sell plastic floor tubing and we do not do installs. We are a metal tube shop: we bend and fabricate copper, steel, and stainless radiant heat tubing into manifolds, coils, and assemblies for hydronic and radiant heating OEMs. If that is the side of the system you are sourcing, send a print through our quote request page.
What materials do you bend for radiant heating manifolds?
We bend copper, steel, and stainless tubing from 1/8 inch to 3 inch OD for radiant heating manifold fabrication. Curtis engineers confirm material and wall thickness against your print during quoting.
Can you fabricate complete radiant heating manifolds, not just bent tube?
Yes. Radiant heating manifold fabrication combines bending, end forming, and welding or brazing into a finished assembly, and we can add corrosion-resistant finishing before it ships. The manifold arrives ready to install, not as loose parts.
Do you make custom radiant heating coils?
Yes. We form custom radiant heating coils — repeatable wraps for heat-transfer surfaces — in copper, steel, or stainless, using the bending method that holds the wall and radius your design needs.
What sizes of hydronic heating tubing can you bend?
We bend hydronic heating tubing from 1/8 inch to 3 inch OD. Bend radius, wall thickness, and tolerance are set part by part; Curtis engineers confirm what is achievable for your geometry during quoting.
Can you handle low-volume or prototype radiant heating orders?
Yes. We handle low-volume custom assemblies with hands-on design support, from a single prototype through repeatable runs, and our rapid prototyping team can build a working prototype from your specs or reverse-engineer a sample part.
How do I request a quote for radiant heat tubing?
Send a print or a sample part through our quote request page. Curtis engineers respond with design feedback and pricing based on material, tolerance, and volume.