Graco 100122 Nipple Close

The Graco 100122 Nipple, Close is a durable ½" NPT male-to-male pipe fitting designed for tight, leak-free connections in Graco fluid and air systems.

Part Number: 100122
Thread Size: ½" NPT (male)
Material: Steel construction
Used In: Ram-Mounted Pumps, 1:1 Extruder, 8900 Proportioner
Function: Connects two female-threaded fittings with minimal spacing

$44.66

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Description

Compatible Machines – Graco 100122 Nipple, Close

Graco 8900 Proportioner assemblies (Instructions/Parts 309790 series) – uses 100122 Nipple, Close in module plumbing.
20:1 President on 55-Gallon Ram (Module 570114) – listed with 100122 in the module parts list.
Ram-Mounted Pumps – models 234120 / 234121 (Manual 308027) specify 100122 Nipple, Close in the fluid outlet assembly.
1:1 Extruder – assembly/kit 570135 (Manual 310726) includes 100122 Nipple, Close in the air/fluid manifold.

Product Overview

The Graco 100122 Nipple, Close is a compact, straight, male-to-male pipe fitting used to connect two female-threaded ports with minimal exposed length. In Graco equipment, it commonly appears in fluid and air manifolds, rams, and proportioner modules where a tight, rigid connection is required.

Key Specs

Part Number	100122
Description	Nipple, Close (male-to-male straight close nipple)
Thread Type / Size	1/2" NPT (male) both ends (as specified in Graco service manuals)
Typical Use	Rigid, space-saving connection between two female NPT ports in proportioners, ram-mounted pumps, and extruder assemblies.
Material	Steel fitting (standard Graco pipe-fittings spec)

Where It’s Used (Typical Locations)

Fluid outlet or air manifolds on Ram-Mounted Pumps.
Metering/ratio modules and manifolds on 8900 Proportioner systems.
Air and fluid cross/tee sub-assemblies on the 1:1 Extruder.

Installation Notes

Verify both mating ports are 1/2" NPT (female) and are properly aligned.
Use appropriate thread sealant compatible with your coating/chemical; avoid excess that could enter the fluid path.
Because this is a close nipple with minimal exposed length, tighten using correct tools and torque to prevent thread damage.

Frequently Asked Questions

Question	Answer
What does “close” mean in Nipple, Close?	It indicates minimal body length—threads run nearly the full length so two female ports can be joined with little or no gap.
Is 100122 the same as a generic 1/2" NPT close nipple?	Functionally similar, but Graco 100122 is specified in Graco manuals and ensures correct fit within listed assemblies.
Which Graco machines list it explicitly?	Ram-Mounted Pumps (e.g., models 234120/234121), 8900 Proportioner modules (incl. 20:1 President on 55-Gallon Ram), and the 1:1 Extruder (kit 570135).
What thread sealant should I use?	Use an NPT-compatible sealant suitable for your material (e.g., water-borne, solvent-borne, or plural-component). Follow Graco and sealant manufacturer guidance.
How do I confirm compatibility for other models?	Check your unit’s parts list; if it specifies 100122, it’s a direct fit. If a different size/part is listed, use that exact part number.