Portals Plus 24045, Alumi-Flash Extra Tall Base w/481 Black Cap

The Portals Plus 24045 Alumi-Flash Extra Tall Base with C-481 Black Cap is designed for roof installations where up to four pipes sized .375″ to 1″ diameter penetrate through a single flashing unit. The base is manufactured from .060″ spun aluminum, 13″ in height, with a 14″ base diameter and an 8″ collared opening featuring two roll-formed beaded sealing rings. The molded EPDM cap model C-481 is coupled with a stainless-steel Snaplock clamp to form a mechanical, weather-tight pressure seal between the cap and base.

Key features:

• Supports up to four pipes sized .375″ – 1″ in diameter. 
• .060″ spun aluminum base, 13″ height, 14″ base diameter, 8″ collared opening with two sealing beads. 
• Molded EPDM cap model C-481 with stainless-steel Snaplock clamp — mechanical compression seal. 
• Intended for grouped pipe penetrations through a single flashing system, reducing need for multiple flashings.

• SKU: 24045 (POR-24045)
• Product type: Alumi-Flash Extra Tall Base with C-481 Black Cap
• Penetration capacity: Up to four pipes sized .375″ – 1″ in diameter. 
• Base construction: .060″ spun aluminum; height 13″; base diameter 14″; 8″ collared opening with two roll-formed beads. 
• Cap: EPDM molded cap model C-481 with stainless-steel Snaplock clamp.

• Install and roof-in the spun aluminum base unit according to Portals Plus installation instructions and the roofing membrane manufacturer’s guidelines.
• Insert up to four pipes sized .375″ – 1″ diameter through the base collar opening.
• Seat the C-481 EPDM cap so its internal grooves engage the two roll-formed sealing beads at the collar.
• Tighten the stainless-steel Snaplock clamp uniformly around the cap to complete the mechanical pressure seal.
• Inspect the entire assembly to confirm full bead engagement and secure clamp fit for a watertight installation.

Q: What pipe sizes does this model support?
A: It supports up to four pipes each sized .375″ – 1″ in diameter.

Q: What are the base dimensions and material?
A: The base is made of .060″ spun aluminum, is 13″ high, and has a 14″ base diameter with an 8″ collared opening featuring two roll-formed sealing beads.

Q: What cap model is used and how is it sealed?
A: The cap is model C-481 (molded EPDM) and is secured to the base collar using a stainless-steel Snaplock clamp to form a mechanical pressure seal.

Q: Is this product compatible with all roof types?
A: Yes. The Alumi-Flash Extra Tall system is designed for all types of roof systems and accommodates up to four small pipe penetrations through a single flashing.