Parker Refrigeration Specialties CK4A-8 Check Valve R-410A making it a staple for
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Parker Refrigeration Specialties CK4A 8 Check Valve R 410A making it a staple for making it a staple for servicing Lennox HVAC systems Follow the terminal designations for your specific RM or flame safeguard model to ensure the shutter loop and signal leads are correctly phased