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The GREEN LEAF RM 3438 is a nylon plastic reducer nipple designed to transition between two different pipe sizes using male iron pipe thread (MIPT) connections on both ends. Sized at 3/4 inch by 3/8 inch, this fitting reduces flow from a larger pipe run to a smaller downstream line in a single threaded component. Molded from nylon, it resists corrosion and is suited for low-pressure fluid handling applications where metal fittings are not required. The white nylon construction is lightweight and easy to hand-tighten for initial assembly. NSF 61 and NSF 372 certifications confirm suitability for potable water contact and low-lead compliance. Plumbers and irrigation technicians are the primary installers.
This reducer nipple is used in residential and light commercial plumbing, irrigation, and water distribution systems where a 3/4 inch supply line must step down to a 3/8 inch branch or fixture connection. The MIPT x MIPT end configuration threads directly into female-threaded fittings, valves, or equipment ports on both ends. It is commonly found in potable water systems, filtration assemblies, and irrigation manifolds where corrosion resistance and NSF compliance are required.
Designed as an OEM-style replacement or new-installation fitting for 3/4 inch by 3/8 inch MIPT threaded connections in residential and commercial plumbing, irrigation, and water filtration systems meeting NSF 61 and NSF 372 requirements.
Installation is performed by licensed plumbers or qualified irrigation technicians. Shut off the water supply and relieve system pressure before threading this fitting into place. Apply thread sealant tape or approved pipe thread compound to the male threads before assembly to ensure a leak-free joint. Do not overtighten nylon fittings with power tools, as excessive torque can crack the fitting body.
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.
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