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865C Preformed Loop

865 Preformed Loop

The five-turn, PVC-encased, Model 865C Preformed Loop is designed for on-site installation prior to pouring pavement material.

Unlike other products that call themselves "Prefomed Loops" but are just coils of wire, our loop comes encased in PVC tubing which protects it from damage and "pre-forms" the loop into an 18-inch by 54-inch rectangle. Also, because it is self-contained, the 865 Preformed Loop greatly reduces installation time.

The 865 Preformed Loop is ideally suited for vehicle detection in traffic control environments such as drive-thrus or parking lots when used with the Marsh 610 Loop Vehicle Detector. It is also compatible with other brands of vehicle detectors.


  • Measures 18 inches by 54 inches.
  • Includes five turns of #16 insulated machine tool wire.
  • 48-inch extension to extend loop beyond curb.
  • 11-inch extension and 90-degree elbow to extend into menu board/speaker post.
  • Encased in schedule 40 PVC material.
  • Sealed with 100% silicone sealant to prevent water infiltration.
  • 20-foot wire pigtails from loop.
  • Loop installation instructions.
  • 5-year warranty.

Installation diagram

(Click here for a printable version, with instructions)

865 Preformed Loop installation diagram. Click the link above for a printable copy.

Free ground shipping within the U.S.!

Price: $135    Buy Now

Also available: A four-pack of Preformed Loops (Save $20!).

Free ground shipping within the U.S.!

Price: $399    Buy Now

Note: When you click the "Buy Now" button, you'll be taken to the shopping cart run by our sister company, TimePilot Corporation.

Marsh Products warranty

For five years after you purchase a Marsh Products Preformed Loop, we will repair or replace (at our discretion) any malfunctioning hardware. The purchaser pays only the shipping to return the malfunctioning part to us. The warranty is void if the product is returned in a damaged state for any reason, including damage that occurs because of a failure to follow installation instructions.