SEPCO E37 E3 Series Zinc Plate...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$13.97
SEPCO E37 E3 Series Zinc Plated Malleable Iron Conduit Enlarger, 1 - 1-1/4-Inch

SEPCO E37 E3 Series Zinc Plated Malleable Iron Conduit Enlarger, 1 - 1-1/4-Inch

(No reviews yet) Write a Review

Model: SEPE37

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

$13.97
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

SEPCO E37 E3 Series Zinc Plated Malleable Iron Conduit Enlarger, 1 - 1-1/4-Inch

The SEPCO E37 is a Zinc Plated Malleable Iron conduit enlarger from the E3 Series, engineered to transition a rigid conduit run from a 1-inch trade size up to 1-1/4-inch. This enlarger fitting provides a durable, corrosion-resistant connection point for electrical raceway systems where a size step-up is required between conduit sections, giving electrical contractors a straightforward way to move from a smaller conduit run into a larger trade size without cutting in a new box or re-routing the raceway. The Malleable Iron body combined with a Zinc Plated finish gives this fitting the strength and protective coating needed for demanding commercial and industrial conduit installations, and its rigid conduit threading is built to hold up under repeated handling on the job site.

Key Features

  • Trade Size: Increases a conduit run from 1" to 1-1/4", allowing a size step-up mid-run without re-routing the raceway.
  • Durable Construction: Malleable Iron body resists impact, drops, and mechanical stress on demanding job sites better than lighter die-cast alternatives.
  • Finish: Zinc Plated coating adds corrosion resistance and a clean, uniform appearance for extended service life in conduit systems.
  • Series: Part of SEPCO's E3 Series of conduit enlarger and conduit body fittings, sharing a consistent Malleable Iron platform.
  • Function: Enlarger design lets electricians expand conduit trade size mid-run to match downstream equipment, box, or code requirements.
  • Installation: Threaded connections at each end allow the enlarger to be installed inline with standard rigid conduit fittings and couplings.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Commercial and Industrial Electrical Installations
  • Rigid Conduit Raceway Systems
  • Conduit Trade Size Transitions and Expansions
  • Panel, Box, and Equipment Conduit Connections
  • New Construction and Renovation Wiring Projects

Why SEPCO?

SEPCO builds the E37 enlarger with a rugged Malleable Iron body and a Zinc Plated finish to withstand the demands of professional electrical installations. This E3 Series fitting delivers a dependable, straightforward solution for expanding conduit runs from 1" to 1-1/4" trade size, helping electricians keep raceway transitions clean and consistent across a job. Choose SEPCO for electrical raceway components engineered for reliable, long-term performance in the field, backed by a Malleable Iron construction that professional installers can count on.

Manufacturer Resources

SEPCO Product Catalog

Product Specs

list_batch:
SEP-20260911
Product Type:
Reducer
Product Finish:
Zinc Plated
Series:
E3
Department:
Electrical
Product Group:
Conduit & Raceway
Product Subgroup:
Conduit Fittings
Product Material:
Malleable Iron
Product Size:
1" - 1-1/4"

SEPCO SEPE37 – Frequently Asked Questions

1) What sizes does the SEPCO E37 conduit enlarger connect?
The SEPCO E37 steps a rigid conduit run from 1 inch trade size up to 1-1/4 inch. Both ends are threaded, so it installs inline between a 1 inch conduit or fitting on one side and 1-1/4 inch on the other. If you need the opposite transition (large to small), you want a reducer going the other direction, not this enlarger.
2) Can I use the E37 enlarger on EMT, or is it rigid conduit only?
It is threaded for rigid conduit. The E37 carries rigid conduit threading at each end and is meant to go inline with standard rigid conduit couplings and fittings. EMT is not threaded, so an EMT run needs a set-screw or compression reducing coupling instead.
3) Do I need to cut in a junction box to go from 1 inch to 1-1/4 inch conduit?
No. That is exactly what the E37 enlarger avoids. It makes the trade size step-up mid-run with a threaded joint at each end, so you keep the raceway continuous instead of adding a box or re-routing to match a larger downstream panel or equipment hub.
4) Will a malleable iron conduit fitting hold up outdoors or in a wet industrial area?
The E37 body is malleable iron with a zinc plated finish, which is the standard corrosion protection for indoor and general commercial or industrial raceway work. Zinc plating is not the same as a hot-dip galvanized or PVC-coated fitting, so for continuous direct weather exposure, chemical wash-down, or buried work, spec a fitting rated for that environment.
5) What is the SEPCO part number for the 1 to 1-1/4 inch conduit enlarger?
Order SEPCO E37. It is the single model on the E3 Series enlarger family covering the 1 inch to 1-1/4 inch transition, in zinc plated malleable iron. Other trade size combinations in the E3 Series carry their own E3-prefix numbers.
6) Why choose malleable iron over a die-cast conduit reducer?
Malleable iron takes impact, drops, and mechanical stress better than lighter die-cast alternatives, which is why the E37 suits commercial and industrial installs where fittings get handled hard and threads get wrenched repeatedly. For light residential work a die-cast fitting is usually enough; for exposed industrial raceway, iron is the safer call.
7) Does the E37 enlarger come with a locknut or bushing, or do I order those separately?
The E37 is the enlarger fitting itself, threaded male-to-female for an inline conduit joint. It is not a box connector, so if your transition lands at an enclosure you still need the appropriate locknuts, bushings, or hubs for that penetration.
How fast can I get the SEPCO SEPE37 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 SEPCO SEPE37 come with a warranty?
Absolutely. The SEPCO SEPE37 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 SEPCO SEPE37?
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 SEPCO SEPE37 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!