Description
The York S1-700091 is a 3/8 SAE refrigeration sight glass designed to provide technicians with a clear, reliable view of refrigerant flow and moisture conditions within a refrigeration or HVAC system. Proper sight glass inspection is a critical step in system commissioning, maintenance, and troubleshooting — allowing technicians to quickly identify issues such as low refrigerant charge, flash gas in the liquid line, or the presence of moisture.
Key Features
- 3/8 SAE connection for straightforward installation on standard refrigerant lines
- Provides a clear visual indication of refrigerant flow and system charge status
- Moisture indicator window helps detect the presence of water in the refrigerant circuit
- Durable construction built to withstand the pressures and temperatures of typical HVAC/R systems
- Genuine York OEM replacement part (SKU: S1-700091)
- Compatible with York and other major HVAC/R equipment using 3/8 SAE line connections
Applications
- Residential and light commercial air conditioning systems
- Refrigeration equipment requiring liquid line moisture and flow monitoring
- OEM replacement for York systems specifying part number S1-700091
Why Use a Sight Glass?
A properly functioning sight glass is an essential diagnostic tool built directly into the refrigerant circuit. By observing the sight glass during system operation, technicians can confirm a full liquid line (no bubbles), verify adequate refrigerant charge, and detect moisture that could lead to acid formation and compressor damage. The York S1-700091 ensures you maintain full visibility into your system’s health at all times.
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