Stainless Steel Inner Tank vs Enamel Inner Tank

Stainless Steel Inner Tank

✅ Advantages:

1.Corrosion Resistance: Excellent, especially with high-quality grades like Duplex stainless steel.

2.Durability: Long lifespan (often 10–20+ years); resists cracking and flaking.

3.Low Maintenance: No anode rod replacement needed in most cases.

4.Cleanliness: More hygienic; less prone to bacterial growth.

5.High-Temperature Resistance: Handles high temps without degrading or releasing harmful substances.

❌ Disadvantages:

1.Cost: Generally more expensive upfront.

2.Water Chemistry Sensitivity: In extremely hard or aggressive water (low pH, high chlorides), stainless steel can still corrode.

3.Welding Quality Critical: Poor welding can create corrosion points (weld decay).

Enamel (Glass-Lined) Inner Tank

✅ Advantages:

1.Cost-Effective: Cheaper to produce and purchase.

2.Corrosion Protection: The glass lining protects the steel underneath from corrosion (when intact).

3.Widely Used: Common in residential and lower-cost commercial systems.

❌ Disadvantages:

1.Vulnerable to Cracking: Thermal expansion or mechanical shock can cause micro-cracks, leading to corrosion.

2.Requires Sacrificial Anode Rod: To prevent rust in exposed steel areas; must be replaced regularly.

3.Shorter Lifespan: Typically 5–10 years; depends heavily on water quality and maintenance.

4.Higher Risk of Bacteria: Cracks or degraded anode may allow bacteria buildup.