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Price Increases
To keep bringing you the very best quality, we’ve slightly adjusted prices on a few of our products by 3% to 5%. You will see these small updates reflected across the shop now.
We truly appreciate your support and understanding!.

PDF Catalog

Castellated Spigots

We supply practical fabrication materials for building custom plenums, ductwork, and HVAC components where standard manufactured fittings or boxes are not suitable.

Our range includes KOOduct duct board sheets, flange systems, and fabrication components commonly used for:

  • Small retrofit installations
  • Custom on-site plenum construction
  • HVAC duct modifications
  • Ventilation upgrades
  • One-off fabrication work
  • Commercial and residential HVAC projects

These products are ideal for installers and contractors needing flexible fabrication solutions for projects where custom sizing, site conditions, or limited space require something outside standard HVAC components.

List Photos
Code Product Price Min.
Quantity		 Status Quantity
CSD300 CSD300 Castellated Spigot Dampered 300Ø
RRP $38.20
$33.22 		0 Available from Stock
CSD350 CSD350 Castellated Spigot Dampered 350Ø
RRP $41.15
$35.78 		0 Available from Stock
CSD400 CSD400 Castellated Spigot Dampered 400Ø
RRP $43.15
$37.52 		0 Available from Stock
CSO150 CSO150 Castellated OVAL Spigot 150Ø
RRP $24.00
$20.87
  • Initial price : $20.87
  • [ 1 - 49 ] : $20.87
  • [ 50 - 99 ] -3.0% : $20.24
  • [ 100 + ] -5.0% : $19.83
0 Manufactured 1-2 Days
CSO200 CSO200 Castellated OVAL Spigot 200Ø
RRP $24.00
$20.87
  • Initial price : $20.87
  • [ 1 - 99 ] : $20.87
  • [ 100 + ] : $16.43
0 Manufactured 1-2 Days
CSO250 CSO250 Castellated OVAL Spigot 250Ø
RRP $24.00
$20.87
  • Initial price : $20.87
  • [ 1 - 99 ] : $20.87
  • [ 100 + ] : $16.43
0 Manufactured 1-2 Days
CSO300 CSO300 Castellated OVAL Spigot 300Ø
RRP $26.00
$22.61
  • Initial price : $22.61
  • [ 1 - 49 ] : $22.61
  • [ 50 - 99 ] -3.0% : $21.93
  • [ 100 + ] -5.0% : $21.48
0 Manufactured 1-2 Days
CSO350 CSO350 Castellated OVAL Spigot 350Ø
RRP $26.00
$22.61
  • Initial price : $22.61
  • [ 1 - 49 ] : $22.61
  • [ 50 - 99 ] -3.0% : $21.93
  • [ 100 + ] -5.0% : $21.48
0 Manufactured 1-2 Days
CSO400 CSO400 Castellated OVAL Spigot 400Ø
RRP $26.00
$22.61
  • Initial price : $22.61
  • [ 1 - 49 ] : $22.61
  • [ 50 - 99 ] -3.0% : $21.93
  • [ 100 + ] -5.0% : $21.48
0 Manufactured 1-2 Days
CSO450 CSO450 Castellated OVAL Spigot 450Ø
RRP $26.00
$22.61
  • Initial price : $22.61
  • [ 1 - 49 ] : $22.61
  • [ 50 - 99 ] -3.0% : $21.93
  • [ 100 + ] -5.0% : $21.48
0 Manufactured 1-2 Days
Available from Stock
Castellated Spigot Dampered 300Ø CSD300
RRP $38.20
$33.22
Available from Stock
Castellated Spigot Dampered 350Ø CSD350
RRP $41.15
$35.78
Available from Stock
Castellated Spigot Dampered 400Ø CSD400
RRP $43.15
$37.52
Manufactured 1-2 Days
Castellated OVAL Spigot 150Ø CSO150
RRP $24.00
$20.87
  • Initial price : $20.87
  • [ 1 - 49 ] : $20.87
  • [ 50 - 99 ] -3.0% : $20.24
  • [ 100 + ] -5.0% : $19.83
Manufactured 1-2 Days
Castellated OVAL Spigot 200Ø CSO200
RRP $24.00
$20.87
  • Initial price : $20.87
  • [ 1 - 99 ] : $20.87
  • [ 100 + ] : $16.43
Manufactured 1-2 Days
Castellated OVAL Spigot 250Ø CSO250
RRP $24.00
$20.87
  • Initial price : $20.87
  • [ 1 - 99 ] : $20.87
  • [ 100 + ] : $16.43
Manufactured 1-2 Days
Castellated OVAL Spigot 300Ø CSO300
RRP $26.00
$22.61
  • Initial price : $22.61
  • [ 1 - 49 ] : $22.61
  • [ 50 - 99 ] -3.0% : $21.93
  • [ 100 + ] -5.0% : $21.48
Manufactured 1-2 Days
Castellated OVAL Spigot 350Ø CSO350
RRP $26.00
$22.61
  • Initial price : $22.61
  • [ 1 - 49 ] : $22.61
  • [ 50 - 99 ] -3.0% : $21.93
  • [ 100 + ] -5.0% : $21.48
Manufactured 1-2 Days
Castellated OVAL Spigot 400Ø CSO400
RRP $26.00
$22.61
  • Initial price : $22.61
  • [ 1 - 49 ] : $22.61
  • [ 50 - 99 ] -3.0% : $21.93
  • [ 100 + ] -5.0% : $21.48
Manufactured 1-2 Days
Castellated OVAL Spigot 450Ø CSO450
RRP $26.00
$22.61
  • Initial price : $22.61
  • [ 1 - 49 ] : $22.61
  • [ 50 - 99 ] -3.0% : $21.93
  • [ 100 + ] -5.0% : $21.48