Valves, Fittings and Controls


Household, RV and manufactured housing systems use a variety of faucet and water control systems using O-Rings, gaskets and seals.

Water, Chemical, Steam, Vacuum and a variety of pressurization requirement impact elastomer choice and sealing design.

Please reach out to our Sales Engineering team for any valve or fitting applications.

Food and Beverage equipment valves and fittings utilize seals meeting CFR 177.2600 requirements and can be provided in NSF, KTW and WRAS listed compounds.

Please reach out to our Sales Engineering team for any food or beverage gasket or seal.

Sprinkler Valve

Residential Sprinkler Systems for Fire Prevention and Irrigation require high performance, cost effective seals sometime meeting UL requirements.

Please reach out to our Sales Engineering team for any fire prevention or irrigation application seals.

Fuel, Petroleum and Natural Gas Dispensing Systems require chemical resistant seals and may require UL listed elastomers.


Irrigation Sprinklers, Valves, Fittings and Controls require a variety of elastomers suitable for use with ABS/lexan Plastic and resistant to chloramines present in modern water supplies.

  • McMasters Koss Inventory for JIT Delivery
  • Shipping Department
  • Pallet ready to ship
  • Durometer Tester
  • O-Ring Micro Vu Measurement
  • ASTM Standards for O-Rings
  • McMasters Koss Global Shipping
  • McMasters Koss Headquarters Complex
  • Oil Seal Environmental Test Machine
  • Quad Rings
  • Fluorocarbon O-Rings and Seals
  • Custom Molded Rubber Seals
  • O-Rings
  • McMasters Koss PPAP with APQP Manuals
  • White Rubber Balls
  • Molded Rubber Seals
  • Oil Seals
  • Custom Molded Seals
  • Extruded Rubber O-Rings