The Complete Guide to Watch Water Resistance Testing

Know Your Watch Limits

Water resistance testing verifies your watch can handle its depth rating.

Types of Tests

Dry Pressure Test

Watch placed in a chamber with increased air pressure. Expansion means a leak.

Condensation Test

Watch heated, water drop on crystal. Moisture inside means compromised seal.

Immersion Test

Watch submerged at rated depth. Water entry means failure.

When to Test

• Every 2-3 years for regular wear
• After any case back removal
• Before water activities if unsure
• If the watch fogs up

Home Tests

• Fog test: breathe on crystal, watch for moisture
• Crown test: pull crown, listen for air leaks