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C.P. Corrosion Protection

"C.P.", manufacturer of non corrosive curb, valve, and drip boxes, has serviced the public utilities for over 32 years. This web page by Farwest features C.P.’s line of corrosion protection test stations. C.P. has been a pioneer in this field, manufacturing both standard test and custom test stations to meet specific requirements.

Many millions of dollars are spent annually by gas, electric, telephone and water utilities to protect underground metallic structures against corrosion. The C.P. Test Box is the hub of the entire cathodic protected system.

Cathodic protection, in effect, is only as good as the Test Box. You will find that C.P.’s test stations will meet the most stringent standards. They are time tested by some of the largest utilities in the United States.

Since cathodic protection is so essential today to maintain old installations, protect new ones against future corrosion, and, in particular, protect additions of new pipe lines to old, it follows that protection and accessibility are key features of the program. C.P. installations will provide these essentials as well as extra dependable features to insure long life. This is the pivotal part of the corrosion protection system.

  • Non-corrosive, strong, durable ABS plastic
  • Lightweight, easy to handle and store
  • Break-proof in normal use
  • Heavy cast iron lid and collar to withstand abuse of heavy traffic
  • Non-conductive-plastic construction eliminates electrolytic and galvanic action
  • Flared design prevents dislocation and reduces strain on wires
  • Terminal block prolongs life of wires by minimizing wire movement and reducing chance of wire breakage
  • Terminal blocks are made of polyester laminate reinforced with fiberglass.
  • Machine screws and nuts are 1/4" 20 thread nickel plated.
  • Lock washers are nickel plated.
  • 4-Inch Cathodic Test Stations

  • The 18" ABS plastic box has a 4" I.D. and also is standard with a 1-1/2" cast iron flange for heavy duty installation at grade level.
  • "Adjustable to grade" test stations are available upon request.
  • Terminal blocks are secured in place beneath the lid.
  • Wires are automatically pulled up when the lid is removed.
  • 0, 1, 2, or 5 terminals are available.
  • 10 connections on 5 post-type terminals is also available.
  • All terminals are made of solid brass.
  • Boxes are flared and squared to prevent pull-out, turning or settling.
  • Cast iron drop-in or one-piece locking lids marked "Test Station" are available.
  • Custom lids are available for an additional charge.
  • Terminal jumpers are available.
  • Test terminals can be incorporated with Handley valve boxes.
  • Underground installation protects the station from vandalism and is esthetically superior; however, above ground test stations are also available.
  • he unique design of Mini Box allows for more simplified testing. Leads are attached to a terminal block in the cap and securely fastened down. The entire cap assembly is easily lifted and tilted for testing.

    A 2-point terminal box is standard. The block is secured in place beneath the cover. 4 or 5-point blocks also available.


  • 6 - 8 Weeks from Date of Confirmed Order

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