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Zurn Z673 - 29" X 30" Extra Heavy-Duty Drain

Zurn Z673 - 29" X 30" Extra Heavy-Duty Drain

Zurn Z673 - 29" X 30" Extra Heavy-Duty Drain

$47,189.80


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SKU Z673-4NH

The Zurn Z673 area drain is engineered for large, demanding surface drainage applications. Built to handle high volumes of runoff and stand up to heavy use, it is well suited for plazas, deck floors, industrial zones, and other open areas where performance and resilience are essential.

Key Features

  • Rugged Construction
    Constructed with heavy-duty materials and protective finishes to resist corrosion, weathering, and mechanical stress.

  • Traffic-Rated Grate with High Flow Capacity
    Designed to support pedestrian or vehicle loads while allowing efficient drainage under heavy storm conditions.

  • Flexible Outlet & Sealing Options
    Offers multiple outlet configurations and interfaces for secure integration with waterproof membranes, paving systems, and drainage piping to ensure leak-resistant, dependable installation.

Downloads:

Product Codes: Z673-29IC, Z673-30IC, Z673-29IG, Z673-30IG, Z673-29IP, Z673-30IP, Z673-29NH, Z673-30NH, Z673-29NL, Z673-30NL, ZB673-29IC, ZB673-30IC, ZB673-29IG, ZB673-30IG, ZB673-29IP, ZB673-30IP, ZB673-29NH, ZB673-30NH, ZB673-29NL, ZB673-30NL, ZN673-29IC, ZN673-30IC, ZN673-29IG, ZN673-30IG, ZN673-29IP, ZN673-30IP, ZN673-29NH, ZN673-30NH, ZN673-29NL, ZN673-30NL

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 Z673 – 29" × 30" Extra Heavy-Duty Drain

A large-format, extra heavy-duty area drain with membrane clamp, seepage pan, and sediment control—engineered for plazas, loading zones, and exposed decks with high loads and high flow.

The Zurn Z673 pairs a Dura-Coated cast-iron body and bottom outlet with a seepage pan, combination membrane flashing clamp & frame, and a cast-iron extra heavy-duty loose slotted grate over a suspended sediment bucket. In plain language: it ties cleanly into waterproofing, stands up to vehicle traffic, and is easy to service for debris capture.

Zurn Z673 29x30 extra heavy-duty drain schematic
Zurn Z673 – Dimensional & Component Schematic

Key Features

  • Large 29" × 30" top for high surface capture at low points.
  • Extra heavy-duty slotted grate designed for traffic-rated service.
  • Membrane flashing clamp & frame for a robust waterproofing interface.
  • Seepage pan assists sub-surface moisture management around the penetration.
  • Suspended sediment bucket reduces downstream clogging and simplifies clean-outs.
  • Dura-Coated cast-iron body with a bottom outlet for long service life.

Where Z673 Excels

Specify the Z673 for plazas, loading docks, industrial floors, garage levels, and exposed decks where drains must withstand impact, wheel loads, and weather. The oversized top captures sheet flow efficiently, and the clamp system helps maintain a watertight assembly through resurfacing cycles.

Sizing & Options (Snapshot)

  • Top: 29" × 30" (two loose slotted grates)
  • Outlet sizes: commonly 4" and 6" (verify on submittal)
  • Outlet types: No-Hub (NH) and Threaded (IP) among others
  • Accessories: Secured/vandal-proof top, stainless mesh liner, backwater valve, 90° side-outlet body, etc.
Zurn brand logo
Zurn – Engineered for Demanding Environments

Specifications at a Glance

Top size: 29" × 30"

Grate: Extra heavy-duty loose slotted (2 grates)

Body: Dura-Coated cast iron; bottom outlet

Waterproofing: Combination flashing clamp & frame; seepage pan

Open area: ~166 in² (total, per submittal)

Approx. weight: ~294–314 lb (by outlet size)

Common outlets: 4", 6" (NH/IP options)

Furnished: Suspended sediment bucket

Always confirm exact dimensions, outlet offerings, and options on the project submittal.

Installation Highlights

1) Set & Secure

Position body to finish elevation; anchor per detail; verify positive slopes toward the drain.

2) Waterproofing Interface

Integrate the seepage pan and flashing clamp with the deck membrane; protect assembly during pours or overlays.

3) Commission & Maintain

Install grates; confirm securement; set a maintenance schedule for sediment-bucket clean-outs before heavy rain or freeze-thaw periods.

Case Study: Plaza Retrofit at Civic Center

A civic plaza had chronic ponding across wide paved areas. Engineers standardized on Zurn Z673 units at low points to boost capture and simplify waterproofing tie-in. After one storm season, maintenance records showed faster runoff removal, fewer surface failures at joints, and quicker clean-outs thanks to the suspended sediment bucket and loose slotted grates.

Frequently Asked Questions

What does “extra heavy-duty” mean for this drain?
The grate and frame are designed for higher load environments (e.g., vehicles and equipment) than medium/heavy-duty drains. Check your project’s load rating requirements.
Which outlet connections are available?
Typical options include No-Hub and Threaded, with 4" and 6" outlet sizes commonly furnished. Verify the exact configuration on the Z673 submittal for your job.
Is a sediment bucket included?
Yes—Z673 is furnished with a suspended sediment bucket to capture debris and streamline maintenance.