The system is the solution...
When you use Link-Seal® Modular Seals in combination with Century-Line® Sleeves,
Cell-Cast® Disks or Model WS Steel Sleeves, you're guaranteed an engineered fit
that will last for the lifetime of your piping system.

Link-Seal® Modular Seal (black, EPDM) is suitable for use in water, direct burial and atomspheric conditions. Black composite pressure plates with either 2-part dichromate corrosion inhibiting coated bolts or stainless steel bolts are available per customer specification.
Applications shown above include:

New Universal Pressure Plate Design
Link-Seal® Modular Seals are now available with new "force dispersion" pressure plates that are desigend to more evenly spread the tensional forces created when torquing the central bolt against both pressure plate and rubber seal. In addition, the new design has an average of 15% more strength than previous Link-Seal® Modular Seal versions. The Universal Pressure Plate design spans the entire line of Link-Seal® Modular Seals.

Link-Seal®S61 Modular Seal (black, EPDM) is specifically designed for use with potable water. Blue composite pressure plates are used in combination with stainless steel bolts.
Applications shown above include:

NSF/ANSI Standard 61 establishes minimum health effects requirements for the chemical contaminants and impurities that may be indirectly imparted to drinking water.
The Link-Seal modular seal® S61™ meets all criteria associated with NSF health effects testing, certification and production facility inspections. PSI / Pikotek registration confirms that NSF has assessed and certified the Model S61™ as conforming with the relevant NSF standards. For more information regarding NSF, visit www.nsf.org.
For the certification confirmation visit
www.nsf.org/Certified/PwsComponents/Listings.asp?Company=C0051828&Standard=061.