SharkBite U004LF Coupling, 1/4...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$8.75
SharkBite U004LF Coupling, 1/4-in (3/8-in OD) Tubing Fitting

SharkBite U004LF Coupling, 1/4-in (3/8-in OD) Tubing Fitting

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Model: U004LF

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

$8.75
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SharkBite U004LF Coupling, 1/4-in (3/8-in OD)

The SharkBite U004LF is a 1/4-in (3/8-in OD) coupling built for straight, in-line tubing-to-tubing connections in rough-in plumbing work. This fitting is sized to join two lengths of 3/8-in OD tubing where a permanent, straight run needs to be extended or repaired without disturbing the surrounding wall or floor cavity. Sold in a carton quantity of 6 ea, the U004LF is a job-ready pack for plumbers and contractors who need multiple small-diameter couplings on hand for service calls, remodel work, or new installation runs. As with all SharkBite branded fittings, the U004LF is manufactured to work within SharkBite's tubing and fitting system, giving installers a consistent, matched-diameter connection point for 1/4-in nominal, 3/8-in OD lines.

Key Features

  • Trade Size: Sized for 1/4-in nominal (3/8-in OD) tubing, matching common small-diameter supply and branch lines.
  • Straight Coupling Configuration: Joins two sections of 3/8-in OD tubing in a single in-line connection, useful for extending runs or splicing in repairs.
  • Job-Pack Quantity: Packaged 6 ea per carton, giving installers enough fittings on-hand for multiple connections across a job without repeat trips to the supply house.
  • Behind-the-Wall Rough-In Use: Designed for use in concealed or accessible rough-in tubing runs where a compact, reliable coupling is needed.
  • SharkBite System Compatibility: Built to the SharkBite fitting platform, so it pairs with SharkBite tubing and related small-diameter fittings for a matched system.

Technical Specifications

  • Model: U004LF
  • Size: 1/4-in (3/8-in OD)
  • Packaging: 6 ea
  • Type: Coupling

Typical Applications

  • Residential and Commercial Rough-In Plumbing
  • Extending or Repairing Small-Diameter Tubing Runs
  • Service and Repair Calls Requiring In-Line Couplings
  • New Construction Tubing Layouts
  • Renovation Projects Involving Concealed Tubing Runs

Why SharkBite?

SharkBite fittings are a familiar standard on plumbing trucks and in rough-in supply houses, and the U004LF coupling extends that same fitting platform down to 1/4-in (3/8-in OD) tubing connections. Buying the 6 ea carton keeps a working supply of small-diameter couplings on hand for the jobs where a quick, matched-size splice or extension is needed. Shop SharkBite plumbing fittings at ZenSupply for consistent, job-ready rough-in supply.

Manufacturer Resources

Spec Sheet

Product Specs

list_batch:
SHK-20260923
Product Type:
Coupling
Department:
Plumbing
Product Subgroup:
Fittings and Valves
Product Size:
1/4"
Product Group:
Fitting

SharkBite U004LF – Frequently Asked Questions

1) Will the SharkBite U004LF coupling fit 3/8-inch OD tubing?
Yes. The U004LF is a 1/4-inch nominal coupling, which is 3/8-inch outside diameter tubing. Both ends take 3/8-inch OD, so it joins two lengths of the same small-diameter line in a straight run. If your tubing measures 1/2-inch OD (3/8-inch nominal), this is the wrong size fitting.
2) What does a 1/4-inch coupling like the U004LF actually get used for on a plumbing job?
It is an in-line splice. Where a small-diameter supply or branch line needs to be extended, or a damaged section cut out and rejoined, the U004LF couples the two tubing ends back together in a straight shot. Common on service calls, remodel work behind finished walls, and new rough-in layouts where you do not want to tear out more cavity than necessary.
3) Can the U004LF coupling be used behind a wall or in a concealed run?
Yes, it is intended for concealed or accessible rough-in tubing runs as well as exposed ones. That makes it usable for a repair splice inside a wall or floor cavity on a 3/8-inch OD line.
4) Is the U004LF a straight coupling or does it change size?
Straight and same-size. Both ends are 1/4-inch nominal (3/8-inch OD), so it is a matched-diameter in-line connection, not a reducer. To step between two different tubing sizes you need a reducing coupling instead.
5) Will the U004LF work with other SharkBite tubing and fittings?
It is built on the SharkBite fitting platform, so it pairs with SharkBite tubing and the other small-diameter SharkBite fittings at the same 1/4-inch nominal, 3/8-inch OD size for a matched system.
6) How many SharkBite U004LF couplings come in a carton?
Six each per carton. That is a job-pack quantity, so one carton covers several connections on a service call or a rough-in run without a second trip to the supply house. Order by the carton if you keep small-diameter couplings stocked on the truck.
7) What is the manufacturer part number for the SharkBite 1/4-inch coupling?
U004LF is the SharkBite part number for the 1/4-inch (3/8-inch OD) coupling. Quote that MPN when ordering or cross-referencing, since SharkBite's small-diameter couplings run close together in numbering.
How fast can I get the SharkBite U004LF 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 SharkBite U004LF come with a warranty?
Absolutely. The SharkBite U004LF 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 SharkBite U004LF?
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 SharkBite U004LF from ZenSupply?
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