








No-Lead Brass Construction (C89550): Compliant with NSF/ANSI 61 and 372 for safe use in potable water systems.
Push-Fit Design: Eliminates soldering, crimping, or solvents—ideal for repairs in tight spaces or hazardous environments, and using the correct connection method helps ensure a leak-free seal with a cleanly cut end before connection.
Multi-Material Compatibility: Works with copper, CPVC, and PEX piping (CTS sizes: 3/8”, 1/2”, 3/4”, 1”), and the right pex adapter depends on the piping system and the material or threaded connection it needs to join. Threaded PEX adapters connect PEX to fixtures with male or female screw threads. They also work well in a hybrid system that combines manifolds with more traditional pipe routing.
Reusable & Removable: Includes a plastic disconnect tool for easy adjustments without damaging pipes.
Integrated Tube Support: Polysulfone stiffeners ensure secure connections with PEX tubing (removable for copper/CPVC). Female PEX adapters allow PEX to connect to male-threaded pipes or valves, while male PEX adapters connect to female-threaded fittings or fixtures.
Underground & Behind-the-Wall Approved: Suitable for concealed installations with proper corrosion protection.
Engineered for reliability in plumbing and heating systems, this PEX adapter is a no-lead brass push-fit fitting that connects cross-linked polyethylene tubing to other piping materials, including male iron pipe threaded connections. Built for plumbing professionals, contractors, and homeowners, it simplifies transitions from PEX to copper, CPVC, or threaded pipe in potable water and hydronic applications, including connections near a water heater, and helps make working with PEX during transitions more straightforward;
No Lead Brass Pex x MIP - 3/4" x 1/2" is a fitting with a push-fit design for PEX x MIP connections. The supplied product data states it is made from no-lead brass, works with copper, CPVC, and PEX in CTS sizes, and is suitable for potable water and hydronic systems, with the right pex adapter depending on the piping system and destination material; shutoff valves may be needed at fixtures depending on the layout, and shoppers can find the relevant connection type, size, and material details in the product data before they place an order or start planning an install.
Component |
Material/Details |
|---|---|
Body |
No-Lead Brass (C89550) |
Grip Ring |
301 Stainless Steel |
O-Ring |
EPDM (Ethylene Propylene Diene Terpolymer) |
Temperature Range |
-40°F to 200°F (many PEX adapters are also rated for temperatures up to 180º F (82ºC), depending on application) |
Pressure Rating |
Up to 200 PSI (varies by application) |
Residential Plumbing: Potable water lines, repairs, and retrofits, including common distribution setups from [manifolds] to household fixtures with each [run] serving areas like the [bathroom]. A traditional trunk-and-branch layout can use a lot more tubing and fittings than manifold-based layouts.
Hydronic Heating Systems: Efficient connections for radiant heating.
Commercial Projects: Durable solutions for high-demand environments.
Emergency Repairs: Quick fixes without open flames or specialized tools.
Superior Strength: Thinner walls than plastic fittings for better flow rates and resistance to water hammer.
Corrosion-Resistant: No-lead brass reduces dezincification risks in harsh water conditions.
Time-Saving Installation: Push-fit design cuts labor time by up to 50% compared to traditional methods.
Versatility: Compatible with PEX-A, PEX-B, and PEX-C tubing systems, and PEX can handle more expansion and contraction than copper, which means it moves differently during installation.
Connection Options: PEX barb adapters require a crimp ring or clamp, cold expansion adapters use an expansion tool with PEX-A, and press adapters use a stainless steel press sleeve for a permanent connection.
Material Comparison: PEX costs less than half the price of copper, does not require glue like CPVC, and is less likely to burst than CPVC when frozen.
Certified for potable water and hydronic heating.
Meets ASTM F1807 standards for metal PEX fittings.
Free from toxins like lead, ensuring compliance with modern plumbing codes.
“No special tools, no wait time, just secure connections in seconds.”
“Trusted by pros for underground and behind-the-wall durability.”
“Upgrade your system with fittings that match the lifespan of your pipes.”
| Material | No Lead Brass |
|---|---|
| Model # | PXMA0403LF |
| Manufacturer | Aqua Science |
| Performance Chart | None |
| Shipping Weight | 1 |
This fitting is installed as a transition between 3/4 inch PEX and 1/2 inch male iron pipe threads.

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