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Zurn Z546 - 21-1/2" Extra Heavy-Duty Drain

Zurn Z546 - 21-1/2" Extra Heavy-Duty Drain

Zurn Z546 - 21-1/2" Extra Heavy-Duty Drain

$2,933.00


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SKU Z546-8NH

The Zurn Z546 is a robust area drain designed for high-flow, high-stress environments. Built to manage large volumes of surface runoff in plazas, paved decks, industrial zones, or outdoor hardscape areas, it combines structural strength, flexibility, and design-aware features.

Key Features

  • Durable Construction
    Built with corrosion-resistant materials and protective coatings to stand up to weather, mechanical loads, and long-term exposure.

  • Traffic-Rated Grate
    Equipped with a strong grate capable of supporting foot traffic and vehicle loads while allowing efficient water intake.

  • Flexible Outlet & Integration Options
    Offers multiple outlet configurations and includes interface features for secure integration with waterproofing membranes, paving systems, and drainage networks.

Downloads:

Product Codes: Z546-8NH, Z546-10NH, Z546-12NH, Z546-8NH-DG, Z546-10NH-DG, Z546-12NH-DG, Z546-8NH-F, Z546-10NH-F, Z546-12NH-F, Z546-8NH-G, Z546-10NH-G, Z546-12NH-G, Z546-8NH-TS, Z546-10NH-TS, Z546-12NH-TS, Z546-8NH-VP, Z546-10NH-VP, Z546-12NH-VP, Z546-8NH-LY, Z546-10NH-LY, Z546-12NH-LY

View Our Full Selection of Zurn Drains →

Shipping

  • All items ship for free (standard ground, see map)
  • Call: (800) 604-5537 for pricing and shipping questions. Shipping estimates shown on the map pertain to this specific product only.
  • Orders typically ship in 1-3 business days. Transit times displayed in the map are listed in business days, and are approximate. The day that the order is shipped is not counted as a transit day.
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Zurn Z546 – 21-1/2" Extra Heavy-Duty Drain

A 21-1/2" diameter, extra heavy-duty area drain built around a Dura-Coated cast-iron body with bottom outlet, seepage pan, and a combination membrane flashing clamp & frame—finished with an extra heavy-duty slotted grate and a suspended sediment bucket. Perfect for high-load hardscapes such as parking decks, plazas, ramps, and industrial slabs.

In technical terms, the Z546 is an extra heavy-duty, 21-1/2" top drain designed to anchor into structural slabs and tie seamlessly into waterproofing. In plain English: it’s a big, tough drain that handles serious traffic and flow while staying easy to service thanks to the removable grate and bucket.

Zurn Z546 21-1/2 inch extra heavy-duty drain schematic with clamp, frame, seepage pan, and sediment bucket
Zurn Z546 – Dimensional & Component Schematic

Key Features

  • 21-1/2" diameter top with extra heavy-duty slotted grate for traffic-rated performance.
  • Dura-Coated cast-iron body with bottom outlet for long service life and straightforward tie-in.
  • Seepage pan + combination flashing clamp & frame to integrate with membranes and toppings.
  • Furnished sediment bucket (suspended) to trap debris and speed maintenance.
  • Pipe sizes: 8", 10", 12" No-Hub (NH) outlet (typical).
  • Popular options: -DG Duresist ductile-iron grate, -F extension frame (1"–4"), -TS top secured, -VP vandal-proof, -G galvanized, -LY less bucket.

Where Z546 Excels

Deploy Z546 in parking structures, transit platforms, industrial aprons, loading docks, and exposed decks where high wheel loads and heavy runoff coincide. Its large grate area and heavy-duty frame resist impact and rocking, while the furnished bucket minimizes downstream clogging between service intervals.

Specifier Snapshot

  • Top size: 21-1/2" diameter
  • Outlet: NH (No-Hub) in 8", 10", 12" (typ.)
  • Open area: ~110 in² (≈710 cm²); approx. weight: ~163 lb (≈74 kg)
  • Grate upgrade: -DG Duresist (ductile-iron) for extreme abuse
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Zurn – Engineered for Demanding Environments

Specifications at a Glance

Top: 21-1/2" dia., extra heavy-duty slotted grate

Body: Dura-Coated cast iron

Outlet: Bottom outlet, NH (8"/10"/12")

Waterproofing: Seepage pan + combo clamp & frame

Furnished: Suspended sediment bucket

Options: -DG, -F (1"–4"), -TS, -VP, -G, -LY

Always confirm final dimensions, load rating, and options on the project submittal.

Installation Highlights

1) Set & Anchor

Seat the body at rough elevation and anchor it per structural detail; verify positive slope toward the drain.

2) Waterproof & Frame

Integrate the seepage pan and clamp/frame with the membrane; protect the assembly during pours/overlays.

3) Commission & Maintain

Install/secure the grate; confirm bucket placement; schedule routine clean-outs before heavy rains and freeze-thaw cycles.

Case Study: Parking Deck Low-Point Rebuild

A four-level parking structure had chronic ponding and grate damage from wheel impacts. The retrofit standardized on Zurn Z546 drains with 10" NH outlets and -DG Duresist grates. Post-retrofit inspections recorded faster drawdown during storms and a marked drop in grate deformation and downstream jetting calls thanks to the furnished sediment buckets.

Frequently Asked Questions

What makes Z546 “extra heavy-duty”?
The 21-1/2" slotted grate and robust frame are designed for high loads and impacts typical of vehicle areas. Ductile-iron Duresist grate (-DG) is available for even harsher abuse environments.
Which outlets and sizes are offered?
Z546 is commonly furnished with a No-Hub (NH) bottom outlet in 8", 10", or 12" to match large storm laterals on decks and plazas.
Is a sediment bucket included?
Yes—Z546 is supplied with a suspended sediment bucket to trap debris upstream and simplify clean-outs.