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  • 1-1/4 in. PVC Caster Fitting Insert for 7/16 in. Caster Post
  • 1-1/4 in. PVC Caster Fitting Insert - Assembly with threaded stem (and nut)
  • 1-1/4 in. PVC Caster Fitting Insert - Assembled

1-1/4 in. PVC Caster Fitting Insert for 7/16 in. Caster Post



Not familiar with PVC pipe? Be sure to check your PVC Pipe Size with our PVC Pipe Comparison chart, or download our easy-to-follow, printable PVC Size Guide.
PVC Size Name Actual Pipe Outside Diameter
1/2 in. Size 13/16"  (0.840")
3/4 in. Size 1-1/16" (1.050")
1 in. Size 1-5/16" (1.315")
1-1/4 in. Size 1-5/8"  (1.660")
1-1/2 in. Size 1-7/8"  (1.900")
2 in. Size 2-3/8"  (2.375")

Product Description

1-1/4 in. Caster Fitting Inserts easily allow you to make your PVC structure mobile. Insert or attach a stem caster to the Caster Fitting Insert, then insert the Caster Fitting Inserts inside the socket of a PVC fitting. Caster Fitting Inserts work with 1-1/4 in. PVC fittings only.

Create PVC Pipe Axles

Use two Caster Fitting Inserts on the ends of a PVC structure that has fittings on both ends to create an axle which can be used with horizontal wheels.  Allows insertion of 3/8 in. diameter steel rods to act as the axle shaft.

Strong, Heavy Duty Durability.

1-1/4 in. Caster Fitting Inserts are infused with impact modifiers that give them the capability to work harder and last longer than standard PVC caps.

Make it Look Manufactured, Not Muddled Together.

FORMUFIT 1-1/4 in. Caster Fitting Inserts are hidden deep within the fitting so they are obscured from view. There are no manufacturer barcodes, printing or markings on them, so your projects look professional and manufactured.

Fully Compatible

FORMUFIT 1-1/4 in. Caster Fitting Inserts are compatible with the following PVC fittings:

  • FORMUFIT 1-1/4 in. Size PVC Fittings
  • 1-1/4 in. Size Plumbing-Grade Schedule 40 PVC Fittings

This Caster Fitting Inserts will fit PVC fittings that have an inside diameter of 1-5/8 in. (1.660 in). More information on PVC pipe sizes and compatibility.

Build with Color.

FORMUFIT Caster Pipe Caps are available in white and black in the 1-1/4 in. PVC Size. Add character and customize your project, or make it unique with your favorite shade.

How to Use

To connect this PVC fitting to PVC pipe:

  1. Insert a threaded caster into the hole in the Caster Cap, and secure it with a nut, or insert a 3/8 in. locking caster into the hole until secure.
  2. Slip the Caster Fitting Insert into the socket of a 1-1/4 in. PVC fitting.
  3. Push or tap into place until the Caster Insert is fully seated inside of the fitting.
Product Compatibility
1-1-4 in PVC Size

This product fits inside of a 1-1/4" Size PVC fitting, which has an inside diameter of 1.660" (1-5/8"). See our PVC 101 section for more info.

Product Specs

Select the product size button below to download the Technical Specifications Sheet to view this products' dimensions and attributes.

Product Images
Formufit 1-1/4 in. PVC Caster Fitting for 7/16 in. Caster Post Wheels for PVC Formufit 1-1/4 in. PVC Caster Fitting Insert for 7/16 in. Caster Post Wheels in Place

Other Details


Use the PVC Caster Fitting Insert with standard off-the-shelf 7/16” stem casters to create unique, portable projects. These PVC Caster Adapters are inserted directly into any port of a 1-1/4” PVC fitting.

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