UponorVerified
LF4521313
1-1/4 inch Uponor Quick & Easy PEX to Male Pipe Thread Adapter, Lead Free
Product Overview
Download the essential "spec sheet" and "shop drawings" for the Uponor LF4521313 ProPEX LF Brass Male Threaded Adapter to streamline your next "submittal". Crafted from durable lead-free brass, this adapter provides a secure 1 1/4" PEX x 1 1/4" NPT connection, perfect for hot and cold domestic potable water, residential fire safety, and hydronic radiant heating and cooling systems, and is even safe for direct burial in soil.
Key Features
- Lead-free (LF) brass construction for potable water safety
- Connects Uponor PEX tubing to male NPT threads
- Suitable for hot and cold domestic potable water systems
- Ideal for residential fire safety (AquaSAFE™) and hydronic radiant heating and cooling systems
- Safe for direct burial in soil
- Compatible with appropriate ProPEX Ring for PEX-a tubing
Technical Specs
CodesUPC, IBC, IRC, IPC, NPC of Canada, UMC, NSPC, IMC
ModelLF4521313
Cv Value32.4
ListingsIAPMO-ES, ICC-ES-PMG, cNSFus-pw-G, U.P.Code
MaterialLF Brass
Part NameProPEX LF Brass Male Threaded Adapter, 1 1/4" PEX x 1 1/4" NPT
StandardsNSF-372, ASTM F877, ASTM F1960, CSA B137.5, NSF-61, NSF-14
DimensionsA: 2.55", B: 1.105", C: 1.925", D: 0.398", E: 1.445", F: 1.68"
Weight per UOM0.62 lbs/UOM
NPT Connection TypeMNPT 1-1/4"
PEX Connection TypeProPEX 1-1/4"
Equivalent Length Through4.2 ft
Temperature/Pressure Ratings73°F (23°C) at 160 psi (11 bar); 180°F (82°C) at 100 psi (6.9 bar); 200°F (93°C) at 80 psi (5.5 bar)
About This Spec
Last Verified
April 3, 2026
Status
Verified (2x confirmed)