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Dayton 4HX79 hinge kit for 30 in square base, galvanized steel components

Dayton

Dayton 4HX79 Hinge Kit 30 in

SKU CH-B0DB-PRW8D MPN 4HX79

Hinge kit fits 30-inch square roof drain bases and matches numerous Grainger part numbers

  • TypeDrain Components
  • Fits 30 in square base roof drains
  • Galvanised steel construction resists corrosion
  • Compatible with Grainger 1MBE6 series parts
  • Compatible with Grainger 2RB65 series parts
  • Compatible with Grainger 3GY66 series parts

Hinge Kit for 30 in Square Base

This Dayton hinge kit is designed for roof-mounted drain assemblies with a 30 in square base. It provides the moving hardware needed to secure and operate the drain cover on compatible units. The kit uses galvanized steel construction for corrosion resistance in outdoor environments. It is intended for maintenance crews and plumbing professionals servicing existing drainage systems.

Suits existing Grainger drain models.

The kit fits a specific list of Grainger part numbers including 1MBE6 through 1MBF2, 2RB65, 2RB66, 3GY66, 3GY67, 3GY70, 3GY71, 4HZ32 through 4HZ57, 4YC64 through 4YC77, 4YU88 through 4YU98, 4YY13 through 4YY19, 4YY75, and 5PV06 through 5PV08. Installers working with different base sizes or non-listed models cannot use this kit. Buyers needing hinges for round bases, smaller square bases, or proprietary OEM drains should look elsewhere.

30 in square base compatibility

The single specification that determines fit is the 30 in square base dimension. Only drain bodies built to that exact footprint align with the hinge mounting points supplied in this kit. Verifying the base size against the installed drain body before ordering avoids mismatched hardware. No other dimension or material choice substitutes for this requirement.

Highlights

  • Fits 30 in square base roof drains
  • Galvanised steel construction resists corrosion
  • Compatible with Grainger 1MBE6 series parts
  • Compatible with Grainger 2RB65 series parts
  • Compatible with Grainger 3GY66 series parts

Specifications

TypeDrain Components
BrandDayton
Model4HX79

Questions about this item

Will the 30 in hinge kit fit my square base drain?

This kit fits a 30 in square base and matches Grainger parts such as 1MBE6, 1MBE7, 2RB65, 2RB66, 3GY66, 3GY67, 4HZ32 and 4HZ33.

How do I install the galvanised steel hinges on a roof-mounted drain?

Align the hinge leaves with the pre-drilled holes on the 30 in square base, insert the supplied pins and secure each leaf with the correct fasteners; the step often missed is tightening the pins before the leaf bolts.

When should I replace the galvanised steel hinge components?

Inspect the hinge leaves and pins annually; replace the kit if the steel shows white rust, pitting or the pins no longer hold the cover firmly in the roof-mounted position.

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