*3" & 4" Insert Dome (strainer) Sold Separately*
Price: $173.90
Item #POR-66801
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Description
The Portals Plus 4″ Aluminum Insert Drain w/ Rubber Seal (POR-66801) is designed for retrofit installations over existing drains during reroof projects. It features a spun aluminum flange (15″ or 18″ O.D.) and an extruded aluminum outlet pipe welded continuously to the flange. A pre-compressed, modified asphalt-impregnated foam or rubber seal forms a watertight connection with the existing drain body, rated from -40 °F to +185 °F with at least 150% elongation. Installation is completed entirely from the rooftop using stainless steel hardware.
Key features:
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Retrofit insert drain designed to fit into an existing 4″ drain outlet without full removal of the original drain.
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Spun aluminum flange and extruded aluminum outlet pipe provide durable structural support.
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Pre-compressed foam/rubber seal rated for –40 °F to +185 °F and 150% minimum elongation ensures a reliable watertight connection.
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Installs entirely from the roof surface with stainless steel hardware; no special tools required.
*Insert Dome Not included*
Specifications
- SKU: POR-66801
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Product type: Aluminum Insert Drain w/ Rubber Seal (4″)
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Fits existing drain outlet size: 4″ diameter
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Flange: Spun aluminum, 15″ or 18″ O.D.
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Seal: Pre-compressed modified asphalt-impregnated foam or rubber, rated –40 °F to +185 °F, ≥150% elongation
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Installation: Rooftop only, uses stainless steel hardware, no special tools required
FAQs
Q: Can this insert drain be installed without removing the existing drain body?
A: Yes — it is designed to be installed on the rooftop above the existing drain, avoiding full drain removal.
Q: How does the seal perform under temperature extremes and movement?
A: The pre-compressed foam/rubber seal is rated for –40 °F to +185 °F and has a minimum 150% elongation, providing elastic, long-term sealing performance.
Q: What size existing outlet does this unit fit?
A: It is sized for an existing 4″ drain outlet.
Q: What materials are used for the flange and outlet construction?
A: The drain insert uses a spun aluminum flange (15″ or 18″ O.D.) and an extruded aluminum outlet pipe welded to the flange for structural integrity.
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