The line, the valve and the pressure
Copper, braided steel or plastic: which line suits a Sub-Zero?
All three carry water; they fail differently. Braided stainless survives being pushed about behind a cabinet, soft copper takes a set and eventually a kink, and plastic tubing splits where it has been nipped. The one hard rule Denver Sub-Zero Repair Experts works to comes from Sub-Zero itself: no copper downstream of a reverse-osmosis system.
Pattern
What we usually find
- Soft copper kinked at the bend behind the cabinet. It survives the first push back into the opening and fails on the third.
- A compression nut over-tightened on copper, which necks the tube and throttles the fill long before it ever leaks.
- Braided hose left coiled too tight against the wall, so the collar chafes where it meets the fitting.
- Plastic tubing run without a sleeve through a cabinet cut-out, cut into slowly by the edge it rests on.
Most often first. Order comes from what the visits keep turning up, not from a count.
What Sub-Zero rules out
Two instructions come straight from the manufacturer. On a reverse-osmosis supply, copper is out, because the treated water leaches metal out of it. The shut-off usually sits about six inches from the compression fitting, and behind the kickplate is acceptable so long as somebody can still reach it.
Choosing, in practice
The material is the plumber’s call and the consequences land on the ice maker, so the useful question is not which is best but which is already fitted and how much slack it has.
Before you call
Two minutes, before anyone comes out
- Look at how the line leaves the fitting: a gentle curve, not a tight bend.
- Check the shut-off within reach of the cabinet opens and closes freely.
- Measure the gap behind the cabinet before pushing it back into the opening.
That is as far as an owner should take it. If what you find does not match this page, call Denver Sub-Zero Repair Experts on (720) 903-2603 and the water path gets measured end to end.
When it needs somebody out: Ice Maker Repair in Denver.