PREVENTS COSTLY WATER LEAKS: This premium o-ring creates a watertight seal between your tank lid and valve head, protecting against water damage and system failures. Specifically designed for the top of tank to valve connection on Clack WS1 systems (both WS1 & 1.25 models), this water filter o-ring maintains proper system pressure and ensures reliable performance. Essential ring replacement parts that safeguard your water treatment investment. FITS MULTIPLE WATER SYSTEMS: Compatible with Pelican PC600, PC1000, PC1500, and PC2100 valve heads, plus Clack V3180 o-ring applications, including WS1 control valves, In/Out Head 1190, D1220, and the newer D1400 designation. This versatile rubber o-ring serves as a direct replacement across multiple brands and models, making it the ideal solution for various tank filter and water softener configurations. Ideal ring system component for professional installers and DIYers. PRECISION-ENGINEERED 3 INCH O RING: Manufactured to exact -337 size specifications with 3 3/8" outer diameter, 3" inner diameter, and 3/16" thickness for guaranteed proper fit. These precise dimensions ensure optimal compression and leak-free sealing when the valve head tightens onto your water tank lid. Superior sizing accuracy compared to generic o-rings by size options means reliable performance in demanding small tank filter and whole-house water treatment applications every time. DURABLE RUBBER O RINGS CONSTRUCTION: Crafted from premium-grade rubber material engineered to resist compression set, maintain elasticity through thousands of cycles, and withstand continuous water exposure without degrading. These high-quality orings rubber seals outlast inferior alternatives, reducing the frequency of filter replacement maintenance. Chemical-resistant construction ensures long-term reliability, making this o-ring kit an essential component ideal for water softener and filtration system longevity. EASY DIY FILTER REPLACEMENT: Save money on expensive service calls by replacing worn o-rings yourself with this direct-fit solution. When your existing oring shows compression, cracking, or leaks, this affordable replacement restores your ring system integrity in minutes. Cost-effective alternative to OEM parts without sacrificing quality. Ideal homeowners, plumbers, and property managers maintain water treatment equipment. Includes the exact rubber o-ring specifications needed for professional results. This premium rubber o ring is the essential replacement part your water softener or filtration system needs to maintain reliable, leak-free operation. Engineered to exact -337 specifications, this 3 inch o ring creates a critical watertight seal between your water tank lid and valve head assembly, preventing costly water damage and system failures. Designed for versatile compatibility, this water filter o ring fits multiple systems including Pelican PC600, PC1000, PC1500, and PC2100 valve heads, plus Clack V3180 applications such as WS1 control valves (both WS1 & 1.25 models), In/Out Head 1190, D1220, and D1400 configurations. Whether you're maintaining a small tank filter or whole-house water filtersystem, this ring replacement parts solution delivers professional-grade performance. Precision matters when it comes to o rings rubber seals. Manufactured with 3 3/8" outer diameter, 3" inner diameter, and 3/16" thickness, this rubber o rings component ensures optimal compression and reliable sealing. The premium construction resists compression set and maintains elasticity through thousands of cycles, outlasting inferior orings alternatives. Save money on expensive service calls by handling your own filter replacement maintenance. This affordable o ring kit component restores your ring system integrity quickly and easily. When your existing oring shows signs of wear, compression, or cracking, this direct-fit replacement from IPW Industries provides the quality seal your water treatment equipment demands for long-term, dependable performance.