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Graco 100345 Plug Pipe

Graco 100345 Plug, Pipe is a genuine OEM threaded plug designed to seal unused 1 in. NPT ports in Graco proportioning manifolds. Ideal for maintaining pressure integrity and preventing leaks.

  • Part Number: 100345
  • Thread Size: 1 in. NPT
  • Used In: Hydra-Cat & Bulldog Hydra-Cat Systems
  • Function: Seals unused fluid manifold ports

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Genuine OEM Plug, Pipe (1 in. NPT) — Specs & Compatibility

Compatible Machines

The Graco 100345 Plug, Pipe is used to seal unused 1 in. NPT ports in select Hydra-Cat / Bulldog Hydra-Cat proportioning systems and manifolds.

  • Hydra-Cat Proportioners (Wall-Mount) — Models 234992, 234993, 234994 (Series A); plug appears in manifold assembly (item 132) as 100345 Plug, Pipe; 1 in. NPT.
  • Hydra-Cat Proportioners (Stand-Mount) — Model group related to above wall-mount kits where the same fluid manifold configuration is used (see manual references for item 132 = 100345).
  • Bulldog Hydra-Cat Fixed-Ratio Proportioners — Assemblies listing item 124 = 100345 Plug, Pipe (11-1/2 NPT(f)); includes Wall-Mount Three-Pump models such as 231847, 231849, 231851, 231854 (see parts tables).

What is the Graco 100345 Plug, Pipe?

A genuine Graco threaded pipe plug used to seal unused manifold ports in high-pressure fluid systems. By closing off a branch, it helps maintain system pressure, prevents leaks, and keeps the fluid path correctly routed in proportioning manifolds.

Key Specifications

OEM Part Number 100345
Thread / Size 1 in. NPT (female in manifold; plug installs male)
Primary Use Seals unused fluid manifold ports in Hydra-Cat / Bulldog Hydra-Cat systems
Installation Notes Relieve pressure; clean threads; apply appropriate pipe-thread sealant; torque to spec per manual; leak-check

Why choose this OEM plug?

  • Correct fit for specified Graco manifolds (avoids mis-threading and leaks)
  • Maintains pressure integrity by closing unused branches
  • Supports serviceability: easy removal for reconfiguration or maintenance

Frequently Asked Questions

Typically no. This part is listed in Hydra-Cat / Bulldog Hydra-Cat proportioning system manifolds. Always verify against your sprayer’s official parts list before purchase.

Use a compatible pipe-thread sealant (or tape if permitted) appropriate for your fluid and pressure. Follow the Graco manual and local best practices; avoid over-application that could migrate into the fluid path.

Match the part number (100345) and thread size (1 in. NPT) in your unit’s parts list. If your parts diagram references item 132 or 124 as Plug, Pipe 100345 in the manifold assembly, it’s the correct plug.

Relieve system pressure, lock-out air/hydraulic power, and wear appropriate PPE. Inspect threads; after installation, perform a pressure/leak check per the manual.

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