Value Collection ZMSCS70218 Silicone O-ring Dash 218 50 Pack

Product Description

The VALUE COLLECTION ZMSCS70218 is a Dash 218 silicone O-ring designed for static and dynamic sealing applications across HVAC, plumbing, and mechanical systems. It measures 1.25 inches inside diameter, 1.5 inches outside diameter, and 0.125 inches thick with a round cross section. The silicone compound provides reliable performance across a wide temperature range, from -80 degrees F to 450 degrees F, making it well suited for high-heat and outdoor-exposure environments. Hardness is rated at 70 Shore A. This O-ring is sold in a package of 50 and is installed by HVAC technicians, plumbers, and mechanical service professionals.

This O-ring fits applications requiring good dry heat resistance, weather resistance, and ozone resistance. It offers limited oil resistance and is compatible with oils, chemicals, and solvents in appropriate concentrations. Typical installation scenarios include equipment connections, valve stems, pump housings, and threaded fittings in residential and light commercial mechanical systems where temperature extremes or outdoor exposure are concerns. The round cross section seats cleanly in standard O-ring grooves sized for Dash 218 dimensions.

Key Features

• Wide service temperature range: -80 degrees F to 450 degrees F
• Round cross section for consistent seating in standard Dash 218 grooves
• 70 Shore A hardness rating for firm, reliable sealing
• Good weather and ozone resistance for outdoor or exposed installations
• Compatible with oils, chemicals, and solvents in suitable concentrations
• Package quantity of 50 supports service stock and bulk repair work

Compatibility

Designed as a standard Dash 218 O-ring replacement for any application requiring a 1.25-inch ID, 1.5-inch OD, 0.125-inch thick round cross section silicone seal.

Installation Notes

Installation is performed by licensed HVAC technicians, plumbers, or qualified mechanical service professionals. Always depressurize and isolate the system before removing the old O-ring and seating the replacement. Inspect the groove for burrs or debris that could damage the new seal or cause leakage. Do not stretch or twist the O-ring during installation; seat it evenly to ensure full contact around the groove circumference.