The Three Material Families
Copper
Copper is familiar, rigid, widely stocked and well understood. It is often the default for traditional plumbers and repair work.
Its weaknesses are fitting count, installation time in complex routes, theft risk, and corrosion sensitivity in some water conditions.
PEX
PEX is flexible, lightweight and fast. It is commonly used in domestic plumbing and underfloor heating.
Its weaknesses are plastic water-contact surface, high thermal expansion, brand-specific fitting systems and client perception where plastic drinking-water contact is a concern.
316L Stainless Steel
Ridgeline uses corrugated 316L stainless steel. It provides a stainless steel water path with coil-based flexible routing.
Its weaknesses are that it is newer to some installers and should be treated as a premium system rather than commodity pipe.
Comparison Table
| Category | Copper | PEX | Ridgeline 316L stainless |
|---|---|---|---|
| Water-contact surface | Copper | Plastic | 316L stainless steel |
| Routing | Rigid | Flexible | Flexible corrugated metal |
| Hidden fitting count | Often high | Medium | Often low |
| Corrosion resistance | Water-chemistry dependent | Does not corrode like metal, but is plastic | Strong 316L corrosion resistance |
| Thermal movement | Low | High | Low metal-family movement, corrugation absorbs movement |
| Installation speed | Slower on complex routes | Fast | Fast on long/complex routes |
| Material perception | Traditional | Plastic | Premium metal |
| Recyclability | Good | Limited/downcycled depending on system | Strong stainless scrap value and recyclability |
| Best use | Familiar repairs and visible runs | Cost-sensitive flexible installs | Whole-home premium plumbing and concealed long runs |
Which Is Best For Drinking Water?
For drinking-water pipework, approval matters first. Any selected system must be suitable for potable water use and installed correctly.
After that, the decision becomes a material choice:
- If you want tradition, copper is familiar.
- If you want low-cost flexibility, PEX is common.
- If you want a premium stainless steel water path with no internal plastic contact, Ridgeline is the stronger fit.
Which Is Best For Installation Speed?
PEX is fast in simple domestic layouts. Copper can be slower because it needs more cutting, jointing and directional fittings. Ridgeline is fastest where the route is long, awkward or concealed, because continuous flexible tube can remove many fittings and elbows.
The bigger the route complexity, the more Ridgeline's long-run advantage matters.
The Ridgeline Position
Ridgeline is not trying to be the cheapest pipe. It is trying to be the better system:
- 316L stainless steel water path
- whole-home hot and cold water
- heat-pump flow and return
- fewer fittings behind walls
- fast routing
- WRAS/KIWA documentation
- product samples and technical support
FAQs
Copper gives a metal water path and is familiar. PEX is faster and more flexible. The better choice depends on the job, budget, route complexity and client preference.
For projects prioritising corrosion resistance, fewer hidden fittings and no plastic water-contact surface, 316L stainless steel is a strong premium option.
No. Ridgeline is corrugated 316L stainless steel tube. The outer protective cover is not the water-contact surface.
For a premium new-build whole-home system, Ridgeline is designed to reduce hidden fittings, route quickly and provide a stainless steel water path across the building.