Zurn Z135-6-T 8" Square Promenade Deck Roof Drain.
Product Overview:
The Zurn Z135‑6‑T is an 8″ (203 mm) square-top roof drain engineered for conventional inverted promenade deck roofs. Its robust Dura‑Coated cast iron body and cast iron flashing clamp collar provide long-lasting protection, while the square grate delivers efficient drainage and a clean curb appeal. The adjustable head and stainless steel extension hardware ensure a precision fit on varied decking constructions.
Key Features & Benefits:
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Durable construction: Dura‑Coated cast iron resists moisture and corrosion on rooftop installations.
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Versatile installation: Interchangeable grate allows selection between square or round top without replacing body.
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Adjustable head: Accommodates slope variations for proper elevation and drainage alignment.
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Robust hardware: Stainless steel drainage extension and bolts assure reliability in harsh environments.
Specifications:
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Body: Dura‑Coated cast iron
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Grate: Square cast iron, compatible with round and square configurations
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Drain type: Roof drain for inverted promenade deck systems
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Adjustability: Threaded extension assembly for vertical adjustment
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Outlet sizes: Supports 2″, 3″, or 4″ outlet connections
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Finish options: Standard durable finish; options available with polished nickel bronze top
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Weight & Flow Capacity: Typical for 8″ drains with open area ~12 in² and weight ~15 lb (dependent on outlet size)
Installation Tips:
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Ensure proper height adjustment using the threaded extension tube and locking bolts before clamping.
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Secure flashing collar firmly to membrane, ensuring a watertight seal.
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Use the interchangeable grate accessory for installation requiring square or round tops.
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Follow local codes regarding outlet connection types (no‑hub, NPT, etc.).
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Regular roof inspection ensures grates remain free of debris for optimal drainage.
FAQs:
Q: Can I switch between square and round grate tops?
A: Yes. The Z135‑6 body supports interchangeable grate tops—round or square—with simple replacement of the grate plate.
Q: What material choices are available?
A: The standard model features cast iron. Nickel bronze grate tops are also available if specified.
Q: What outlets does this drain support?
A: Compatible with standard 2", 3", or 4" outlets, including no‑hub and threaded types.
Q: Is the head height adjustable after installation?
A: Yes, the stainless steel extension allows for vertical adjustment to match decking elevation.
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