UPONOR Barbed Fitting Adapter: 1 1/2 in ID x 1 1/2 in Pipe Size, Barbed x NPT
The UPONOR Barbed Fitting Adapter (MPN LF4521515) is an expansion brass barbed tube fitting with a 1 1/2 in ID x 1 1/2 in Pipe Size and a Barbed x NPT connection type. It uses an expansion PEX connection method, as…
SKU 3G-OTH-467901
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Product Description
The UPONOR Barbed Fitting Adapter (MPN LF4521515) is an expansion brass barbed tube fitting with a 1 1/2 in ID x 1 1/2 in Pipe Size and a Barbed x NPT connection type. It uses an expansion PEX connection method, as specified by the OEM.
Frequently Asked Questions
What is the UPONOR Barbed Fitting Adapter LF4521515 used for?
The UPONOR Barbed Fitting Adapter LF4521515 connects 1 1/2 in PEX tubing to NPT threaded pipes in hydronic heating, plumbing, and radiant systems. Its expansion brass construction provides a reliable, leak-resistant joint for commercial and residential installations.
What are the specifications of the UPONOR LF4521515?
The UPONOR LF4521515 is a brass barbed fitting adapter with a 1 1/2 in ID x 1 1/2 in pipe size, Barbed x NPT connection, and expansion PEX connection method. It is manufactured by UPONOR under MPN LF4521515.
Where to buy the UPONOR LF4521515 worldwide?
3G Electric supplies the UPONOR LF4521515 barbed fitting adapter to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this expansion brass fitting.
How to install the UPONOR expansion barbed fitting?
For the UPONOR LF4521515, use an expansion tool to enlarge the PEX tubing end, then insert the barbed adapter before the tubing contracts around it. Ensure the NPT threads are sealed with appropriate tape or compound. Follow UPONOR's instructions for proper expansion depth.
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 Elbow: 1/2 in ID x 1/2 in Pipe Size, Barbed x FNPT, Brass, Expansion (MPN LF4235050). Key specifications — [New] - PEX Connection Method: Expansion; Brand: UPONOR; Connection Type: Barbed x FNPT.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2F4bd1f0b4-6cd9-45fe-ab9a-f308dac795d4.jpg&w=200)
![UPONOR Barbed Fitting Adapter: 2 in ID x 2 in Pipe Size, Barbed x NPT, Brass, Expansion (MPN LF4572020). 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%2F4b29e408-5a56-4271-b073-63e78a7393a0.jpg&w=200)
![UPONOR Barbed Fitting Adapter: 1 1/4 in ID x 1 1/4 in Pipe Size, Barbed x NPT, Brass, Expansion (MPN LF4571313). 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%2F4b231bd5-36c7-4358-91d6-765765beaebe.jpg&w=200)
![UPONOR Barbed Fitting Elbow: 3/4 in ID x 3/4 in ID Size, Barbed x Barbed, Brass, Expansion (MPN LF4710750). Key specifications — [New] - PEX Connection Method: Expansion; Brand: UPONOR; Connection Type: Barbed x Barbed.](/img/p?u=https%3A%2F%2Foxalncjenpflyqfncuhe.supabase.co%2Fstorage%2Fv1%2Fobject%2Fpublic%2Fproduct-assets%2Fgrainger%2F4a3c1df4-7743-4faf-ae8e-61f96a22dcfc.jpg&w=200)
![UPONOR Barbed Fitting Adapter: 1 in ID x 1 in Pipe Size, Barbed x NPT, Brass, Expansion (MPN LF4571010). 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%2F49e724c3-f549-457c-a859-88300f1b00c5.jpg&w=200)
![UPONOR Barbed Fitting Adapter: 1 1/4 in ID x 1 1/4 in Pipe Size, Barbed, Brass, Expansion (MPN CP4501313). 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%2F3a76ec41-753a-432e-8f67-9b1e031541c0.jpg&w=200)
![UPONOR Barbed Fitting Adapter: 3/4 in ID x 3/4 in Pipe Size, Barbed x Press-fit, Brass/Copper (MPN LFP4507575). 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%2F39919615-b0fa-4214-84c0-d52c2c6273ed.jpg&w=200)
![UPONOR Barbed Fitting Adapter: 1 in ID x 1 in Pipe Size, Barbed x Press-fit, Brass/Copper, Expansion (MPN LFP4511010). 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%2F3578ea8b-13a5-42a1-a266-d24bd3844c1b.jpg&w=200)