UPONOR Barbed Fitting Adapter: 3/4 in ID x 1/2 in Pipe Size, Barbed x Cup, Brass/Copper
The UPONOR Barbed Fitting Adapter (MPN LF4517550) is an expansion brass barbed tube fitting with a 3/4 in ID x 1/2 in Pipe Size, featuring a Barbed x Cup connection type and a PEX connection method of Expansion. 3G…
SKU 3G-OTH-468077
Need installation or engineering help?
Ask a question
Product Description
The UPONOR Barbed Fitting Adapter (MPN LF4517550) is an expansion brass barbed tube fitting with a 3/4 in ID x 1/2 in Pipe Size, featuring a Barbed x Cup connection type and a PEX connection method of Expansion. 3G Electric interprets this demand and delivers the genuine UPONOR part, backed by specialist sourcing across 14 industrial departments—including combustion, pumps, and controls—to ensure you get the right solution, not just a catalog listing.
Frequently Asked Questions
What is the UPONOR Barbed Fitting Adapter LF4517550 used for?
The UPONOR Barbed Fitting Adapter LF4517550 connects PEX tubing to copper or brass piping systems in potable water and hydronic heating applications. Its 3/4 in ID x 1/2 in Pipe Size barbed x cup design provides a secure, leak-resistant joint using the expansion PEX connection method.
What are the specifications of the UPONOR LF4517550 fitting?
The UPONOR LF4517550 is a brass/copper barbed x cup adapter with a 3/4 in ID x 1/2 in Pipe Size. It uses the expansion PEX connection method and is manufactured by UPONOR under MPN LF4517550. The connection type is barbed x cup, suitable for PEX tubing systems.
Where to buy the UPONOR LF4517550 worldwide?
3G Electric supplies the genuine UPONOR LF4517550 barbed fitting adapter to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. As a specialist industrial sourcing partner across 14 departments, we ensure you receive the correct part for your application.
How to install the UPONOR expansion barbed fitting adapter?
To install the UPONOR LF4517550, first expand the PEX tube end using an expansion tool, then insert the barbed adapter fully. The cup connection accepts copper or brass pipe. Follow standard PEX expansion practices: ensure clean cuts, proper ring placement, and allow the joint to contract for a tight seal.
Used in
Common applications for UPONORUPONOR Products
3G Electric supplies UPONOR expansion brass barbed tube fittings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.


![UPONOR Barbed Fitting Adapter: 1 1/2 in ID x 1 1/2 in Pipe Size, Barbed x Press-fit, Brass/Copper (MPN LFP4511515). Key specifications — [New] - PEX Connection Method: Expansion; Brand: UPONOR; Connection Type: Barbed x Press-fit.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2F1a573b2c-18ec-40f0-aecc-a604ea71a095.jpg&w=200)
![UPONOR Barbed Fitting Adapter: 3/4 in ID x 3/4 in Pipe Size, Barbed x Cup, Brass/Copper, Expansion (MPN LF4517575). Key specifications — [New] - PEX Connection Method: Expansion; Brand: UPONOR; Connection Type: Barbed x Cup.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2F182a6be7-ede1-47c0-b57e-5af87c58edae.jpg&w=200)
![UPONOR Barbed Fitting Adapter: 1/2 in ID x 3/4 in Pipe Size, Barbed x Cup, Brass/Copper, Expansion (MPN LF4515075). Key specifications — [New] - PEX Connection Method: Expansion; Brand: UPONOR; Connection Type: Barbed x Cup.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2F17659b63-ad24-4cf6-be84-d6e76e055956.jpg&w=200)
![UPONOR Barbed Fitting Adapter: 2 in ID x 2 in Pipe Size, Barbed x Cup, Brass/Copper, Expansion (MPN LF4502020). Key specifications — [New] - PEX Connection Method: Expansion; Brand: UPONOR; Connection Type: Barbed x Cup.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2F17029999-2475-4035-a3e5-ac0a3773f639.jpg&w=200)
![UPONOR Barbed Fitting Adapter: 1/2 in ID x 1/2 in Pipe Size, Barbed x NPT, Brass, Expansion (MPN LF4525050). Key specifications — [New] - PEX Connection Method: Expansion; Brand: UPONOR; Connection Type: Barbed x NPT.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2F150f9992-cd4a-4bf0-b3da-96becfce4b07.jpg&w=200)
![UPONOR Barbed Fitting Adapter: 2 1/2 in ID x 2 1/2 in Pipe Size, Barbed x Cup, Brass/Copper (MPN LF4512525). Key specifications — [New] - PEX Connection Method: Expansion; Brand: UPONOR; Connection Type: Barbed x Cup.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2F13b360aa-ce98-4263-aa69-b1e377c9d554.jpg&w=200)
![UPONOR Barbed Fitting Adapter: 1 1/2 in ID x 1 1/2 in Pipe Size, Barbed x Cup, Brass/Copper (MPN LF4511515). Key specifications — [New] - PEX Connection Method: Expansion; Brand: UPONOR; Connection Type: Barbed x Cup.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2F04de57ed-f9ff-492a-857a-2afe6e4494d5.jpg&w=200)
![UPONOR Barbed Fitting Adapter: 1 in ID x 1 in Pipe Size, Barbed, Brass, Expansion (MPN LF2891010). Key specifications — [New] - PEX Connection Method: Expansion; Brand: UPONOR.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2F01f66098-ab61-4994-a6da-0d539ce36115.jpg&w=200)