Greenlee 50110390 Flexible Foa...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$63.13
$17.07
Greenlee 50110390 Conduit Pistons

Greenlee 50110390 Flexible Foam Conduit Piston, Fish Line Pull

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Model: 50110390
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$63.13
$17.07
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Greenlee 50110390 Flexible Foam Conduit Piston

The Greenlee 50110390 Flexible Foam Conduit Piston is engineered for use with a blower or vacuum power fishing system to pioneer the fish line through a conduit run. Built with a flexible foam body that forms an air-tight seal, this conduit piston is available for all types and sizes of conduit from 1/2 IN through 6 IN, making it a versatile core component of any electrician's or contractor's conduit fishing toolkit. A color-coded end disk with embossed size markings speeds up job-site selection, while a strong steel center rod with loops on both ends provides a secure attachment point for fish line or tape. Made in the United States, this conduit piston is engineered to hold up to repeated use in demanding commercial and industrial conduit runs.

Key Features

  • Trade Size Range: Available for all types and sizes of conduit from 1/2 IN through 6 IN, covering nearly any conduit fishing application.
  • Durable Construction: Flexible foam body creates an air-tight seal so a blower or vacuum power fishing system can effectively drive the piston through the conduit run.
  • Color-Coded Sizing: Color-coded end disk with embossed size markings allows electricians to quickly and accurately select the correct piston size for the job.
  • Steel Center Rod: Strong steel center rod with loops on both ends provides a secure attachment point for fish line or tape during pulls.
  • Compatible Fishing Systems: Designed to work with blower or vacuum power fishing systems to pioneer the initial line through long or difficult conduit runs.
  • Versatile Sizing Options: A full range of piston sizes means a single system can be equipped for jobs spanning small branch conduit through large feeder conduit.
  • Compact Dimensions: Product measures 5.75 IN in length, 3.35 IN in width, and 2.35 IN in height for easy handling and storage.

Technical Specifications

  • Country Of Origin: US
  • Product Height: 2.35 IN
  • Product Length: 5.75 IN
  • Product Width: 3.35 IN
  • Volume: 0.2125575 CI

Typical Applications

  • Conduit and Raceway Fishing Operations
  • Commercial and Industrial Electrical Installations
  • Power Fishing System Line Pioneering
  • New Construction and Retrofit Wiring Projects
  • Long-Run and High-Fill Conduit Pulls

Why Greenlee?

Greenlee conduit pistons are built with a flexible foam body and steel center rod designed to withstand the demands of professional conduit fishing work. The color-coded, embossed sizing system helps crews work faster and more accurately on the jobsite, while the wide 1/2 IN through 6 IN size range ensures compatibility across a broad range of conduit fishing projects. Made in the United States, Greenlee conduit pistons deliver the dependable performance electrical professionals expect from a leading tool brand.

Manufacturer Resources

Product Specs

Country Of Origin:
United States
Product Height:
2.35 IN
Product Length:
5.75 IN
Product Width:
3.35 IN
Volume:
0.2125575 CI
Product Type:
Conduit Piston
Department:
Electrical
Product Subgroup:
Conduit Pistons
Product Group:
Conduit & Raceway

Greenlee 50110390 – Frequently Asked Questions

1) What does a Greenlee foam conduit piston actually do on a conduit pull?
The Greenlee 50110390 foam conduit piston is the thing you send through an empty conduit first to pioneer a fish line. The flexible foam body seals against the conduit wall so a blower or vacuum power fishing system can push or pull it along the run. A steel center rod with loops on both ends gives you the tie-off point for fish line or tape, so once the piston lands you have a line through the run to pull your rope and then your conductors.
2) Do I need a blower or vacuum system, or can I use the piston with a fish tape by hand?
It needs air. The piston is built to be driven by a blower or vacuum power fishing system, which is what makes the air-tight foam seal matter. Without that air pressure or suction behind it there is nothing to move the piston down the run, so a piston is not a substitute for a fish tape or rodder on a short conduit you can reach through by hand.
3) What conduit trade sizes can Greenlee foam pistons be used in?
Greenlee flexible foam conduit pistons cover all types and sizes of conduit from 1/2 inch through 6 inch trade size. The piston has to match the conduit bore to hold a seal, so you pick the size for the run you are fishing rather than expecting one piston to work across the range. A color-coded end disk with embossed size markings tells you at a glance which one you are holding.
4) Will one foam piston seal in both EMT and PVC conduit?
Greenlee states the piston line covers all types of conduit in the 1/2 inch to 6 inch range, so EMT, rigid, and PVC runs are all in scope. The seal comes from the compressible foam body rather than from any one conduit material, which is why the size, not the raceway type, is the decision you have to get right.
5) Is the Greenlee 50110390 conduit piston made in the USA? We have domestic-sourcing requirements on federal work.
Country of origin is the United States. That matters for public-works and federally funded jobs where crews have to document domestic-sourced tooling and consumables.
6) What else do I need to order to fish a long conduit run with a piston?
The piston only pioneers the line. You still need the blower or vacuum power fishing system to drive it, plus the fish line or mule tape you tie to one of the two loops on the steel center rod. From there the line pulls your pull rope and the rope pulls the conductors. For a crew running mixed branch and feeder conduit, stocking more than one piston size across the 1/2 inch to 6 inch range is what keeps a single blower system usable on every opening.
7) How big is the Greenlee 50110390 piston, and will it fit in a tool bag or job box?
Measures 5.75 inches long, 3.35 inches wide, and 2.35 inches high, so it stores flat in a tool bag pocket or a shelf in the job box without a case. Volume is listed at 0.2125575 cubic inches.
How fast can I get the Greenlee 50110390 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Greenlee 50110390 come with a warranty?
Absolutely. The Greenlee 50110390 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Greenlee 50110390?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Greenlee 50110390 from ZenSupply?
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