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Josam 21500 Poly Waterdam Combo Kit




This Josam 21500 Poly Waterdam Combo Kit was created for repairing the Josam 21500 Roof Drain This kit includes:

  • One 4114 [ns] poly dome
  • One 21500 2" external waterdam drain ring
  • One bolt kit 

Josam 4114 [ns] Poly Dome

  • Outside diameter: 13"-in.

Josam 21500 Drain Ring

  • Outside diameter: 13-3/4"-in.
  • 180° Bolt to Bolt: 10-1/4"-in.
  • Adjacent Bolt to Bolt: 7-1/2"-in.

Josam Bolt Kit

  • Includes 4 bolts

About the Josam 21500 Roof Drain The Josam 21500 Roof Drain is used on any size roof and any type of construction. Its large slotted dome provides maximum free area for quick drainage, while protecting the sump and connecting pipe from debris.