
Material Integrity
Industrial Heavy-duty Cast Iron BS EN 1561 construction. Complies with international standards for high-corrosive environmental resistance.
Cast Iron Roof Drain Dome Type
Super-duty dome roof drain. Dura-coated thick cast iron body, high-clamp flashing wing, and massive gravel guard. Choice of heavy cast iron or lightweight aluminum dome.
Technical Specifications
Engineering Features
- Massive weight provides excellent concrete anchoring
- Flashing ring clamps roof waterproofing membranes reliably
- Engineered to withstand heavy freezing temperatures
Bespoke Size & custom casting specs
Need a custom drainage length, width, high-discharge silt sieve, or special metallurgical alloy (e.g., solid brass, marine SS316, nickel-bronze)? Delta's master foundries forge bespoke components directly to your BIM requirements.
Related Solutions

Cast Aluminum Roof Drain L-Type
Angled 90-degree parapet scupper drain. Crafted from lightweight, high-strength casting grade 319 aluminum (or cast iron option). Handily collects rainwater from floor-to-wall corner transitions.

Cast Aluminium Roof Drain Dome Type
Universal circular roof drain with a high-capacity self-cleaning aluminum dome. Generous slot apertures allow high water entry during storm events.

8-Inch Prom-Dec Drain with Heel-Proof Grate
Promenade Deck (Prom-Dec) drain with flat heel-safe grating. Dura-coated cast iron body with a square steel promenade frame that lays flush with roof tiles or concrete pavers.