

Ships same day if ordered by 12 pm
Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The Mueller U3-10E is a brass adapter fitting designed for plumbing and HVAC applications. This fitting features a five-eighths inch flare connection on one end and a three-fourths inch female pipe thread on the other, allowing for versatile connections.
This fitting is ideal for use in hydronic and pneumatic systems, ensuring reliable connections for gas and fluid applications.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
Add install kit to cart
—
Thanks for subscribing!
This email has been registered!