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Black cast iron toilet flange, four inch size, circular with bolt slots

OATEY

OATEY 43653 Toilet Flange Black Cast Iron 4 Inch

SKU CH-J21P-ZNP80

A 4-inch cast-iron toilet flange in black for floor-drain connections

  • TypeTraffic & Parking Lot
  • Black finish resists corrosion on the cast iron body
  • Cast iron construction provides structural strength for the connection
  • Four-inch size fits standard floor-drain openings
  • Designed for secure toilet-to-drain installation

OATEY 43653 Cast Iron Toilet Flange

The OATEY 43653 is a four-inch toilet flange cast from black iron for use with a floor drain. It suits plumbers and builders installing or replacing a closet connection in residential or light commercial bathrooms. The heavy casting resists cracking during tightening and provides a stable base for the wax seal. This flange is not intended for above-grade or offset installations that require a different fitting profile.

Sustained Load Behaviour of Cast Iron Flange

Under continuous loading from a mounted fixture the cast iron body distributes weight evenly without the creep seen in plastic alternatives. The material withstands repeated thermal cycles from hot wastewater without softening or warping. Corrosion resistance is limited to the factory black finish; prolonged exposure to standing water or aggressive chemicals will eventually degrade the surface. Installers should verify that the surrounding structure can support the flange weight over the service life.

Highlights

  • Black finish resists corrosion on the cast iron body
  • Cast iron construction provides structural strength for the connection
  • Four-inch size fits standard floor-drain openings
  • Designed for secure toilet-to-drain installation

Specifications

BrandOATEY
TypeTraffic & Parking Lot

Questions about this item

Does the 43653 cast-iron flange generate any noise, heat or power draw when installed in a floor drain?

No, the 43653 is a passive cast-iron fitting with no moving parts, so it produces no noise, heat or electrical load during continuous use.

What existing plumbing components must already be in place for the 43653 flange to function?

A 4-inch floor drain and a compatible toilet horn are required; the flange bolts to the drain and seals to the toilet outlet.

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