Value Collection ZMSCS70250 Silicone O-ring Dash 250 5pk

Product Description

The VALUE COLLECTION ZMSCS70250 is a round cross-section silicone O-ring sized to Dash 250 dimensions, with a 5 inch inside diameter, 5.25 inch outside diameter, and 0.125 inch thickness. Rated at 70 Shore A hardness, this O-ring is manufactured from silicone compound suited for sealing applications that demand a wide operating temperature range. It handles continuous service from -80 degrees F to 450 degrees F, making it appropriate for dry heat, outdoor exposure, and ozone-rich environments. Plumbers, HVAC technicians, and industrial maintenance personnel commonly use O-rings of this type to seal pipe flanges, pump housings, and large-bore fittings where consistent radial compression is required.

This O-ring is intended for use in applications involving oils, chemicals, and solvents where good weather and ozone resistance are priorities. Its silicone construction offers reliable performance in dry heat service and wide temperature cycling. It is well suited for residential and light commercial plumbing, HVAC equipment, and industrial fluid handling systems. The white color aids visual inspection during installation. This product is sold in a package quantity of 5 and carries a minimum order quantity of 1 package.

Key Features

• Dash 250 standard sizing: 5 inch ID, 5.25 inch OD, 0.125 inch cross-section thickness
• Silicone material rated for -80 degrees F to 450 degrees F operating range
• 70 Shore A hardness providing firm, consistent radial seal under compression
• Round cross-section profile for standard O-ring groove fitment
• Resistant to weathering, ozone, and dry heat exposure
• Sold as a pack of 5 units per package

Compatibility

Designed as a standard Dash 250 O-ring replacement for any application requiring a 5 inch ID silicone seal with a 0.125 inch cross-section, including pump housings, flanged connections, and large-bore valve assemblies.

Installation Notes

Installation should be performed by a qualified plumber, pipefitter, or HVAC technician following applicable codes such as the IPC or IFGC. Always depressurize and drain the system completely before removing the existing O-ring. Inspect the groove for nicks, burrs, or corrosion before seating the new O-ring. Avoid twisting or overstretching the O-ring during installation, and do not use petroleum-based lubricants with silicone compound seals unless confirmed compatible with the system fluid.