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Zurn Z645 - 12" x 12" Extra Heavy-Duty Drain

Zurn Z645 - 12" x 12" Extra Heavy-Duty Drain

Zurn Z645 - 12" x 12" Extra Heavy-Duty Drain

$4,284.29


FREE SHIPPING
SKU Z645-3IC

The Zurn Z645 is a 12-inch square, extra heavy-duty area drain engineered for demanding drainage applications. It’s built to perform under high loads, manage large runoff volumes, and integrate reliably with paving and waterproofing systems.

Key Features

  • Dura-Coated Cast Iron Body with Side Outlet — Provides strength, corrosion resistance, and compatibility with common piping connections.

  • Internal Trap with Bronze Cleanout Plug & Seepage Pan — Built-in trap offers odor control and service access; the seepage pan catches peripheral flow.

  • Membrane Clamp / Frame + Heavy-Duty Slotted Grate & Sediment Bucket — Combination flashing clamp helps secure waterproofing, while the hinged, heavy-duty grate and suspended aluminum sediment bucket permit easy maintenance.

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Product Codes: Z645-3IC, Z645-4IC, Z645-3NH, Z645-4NH, Z645-3NL, Z645-4NL, ZB645-3IC, ZB645-4IC, ZB645-3NH, ZB645-4NH, ZB645-3NL, ZB645-4NL, ZN645-3IC, ZN645-4IC, ZN645-3NH, ZN645-4NH, ZN645-3NL, ZN645-4NL, Z645-3IC-AR, Z645-4IC-AR, Z645-3NH-AR, Z645-4NH-AR, Z645-3NL-AR, Z645-4NL-AR, Z645-3IC-G, Z645-4IC-G, Z645-3NH-G, Z645-4NH-G, Z645-3NL-G, Z645-4NL-G, Z645-3IC-VP, Z645-4IC-VP, Z645-3NH-VP, Z645-4NH-VP, Z645-3NL-VP, Z645-4NL-VP, Z645-3IC-TS, Z645-4IC-TS, Z645-3NH-TS, Z645-4NH-TS, Z645-3NL-TS, Z645-4NL-TS, Z645-3IC-Y, Z645-4IC-Y, Z645-3NH-Y, Z645-4NH-Y, Z645-3NL-Y, Z645-4NL-Y

Frequently Asked Questions

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 Z645 – 12" × 12" Extra Heavy-Duty Drain (Integral Trap)

A square, extra heavy-duty area drain featuring a Dura-Coated cast-iron body, integral trap with cleanout, membrane flashing clamp & frame, and a hinged heavy-duty slotted grate—built for exposed decks, plazas, and industrial floors.

The Zurn Z645 brings together rugged construction and service-friendly details. In technical terms, it’s a 12" × 12" (≈12-1/2" overall) square-top drain with a side outlet, integral trap and bronze cleanout plug, seepage pan, and a combination membrane flashing clamp & frame, furnished with a hinged heavy-duty slotted grate and suspended aluminum sediment bucket. In plain language: it controls odors, ties cleanly into waterproofing, stands up to traffic, and makes clean-outs quick.

Zurn Z645 12x12 integral trap heavy-duty drain schematic
Zurn Z645 – Dimensional & Component Schematic

Key Features

  • Integral trap with bronze cleanout helps control odors and provides easy service access.
  • Dura-Coated cast-iron body with side outlet for long service life and straightforward tie-in.
  • Membrane flashing clamp & frame + seepage pan simplify waterproofing and manage subsurface moisture.
  • Hinged heavy-duty slotted grate speeds inspections while resisting deformation under traffic.
  • Suspended aluminum sediment bucket (furnished) captures debris to reduce downstream clogging.

Applications & Benefits

Specify Z645 for parking decks, precast garage levels, plazas, processing bays, and industrial floors. The square top suits grid-like joint layouts, while the integral trap and sediment bucket streamline maintenance and safety by controlling odors and debris.

Installer-Friendly Details

  • Outlet options: 3", 4", 6" sizes in IC/IG/IP/NH/NL to match your piping system.
  • Top finishes: Cast iron standard; bronze or nickel-bronze tops available by prefix to meet aesthetic or corrosion goals.
  • Open area: ~44 in² grate free area (typ.), supporting efficient surface capture.
Zurn brand logo
Zurn – Engineered Drainage for Demanding Environments

Specifications at a Glance

Top: 12" × 12" square (≈12-1/2" overall)

Body: Dura-Coated cast iron; side outlet

Trap: Integral trap with bronze cleanout plug

Waterproofing: Flashing clamp & frame with seepage pan

Grate: Hinged heavy-duty slotted; secured options available

Debris Control: Suspended aluminum sediment bucket (furnished)

Outlet types: IC / IG / IP / NH / NL (3", 4", 6" typical)

Grate open area: ~44 in² (typ.)

Installation Highlights

1) Set & Secure

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

2) Waterproofing Tie-In

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

3) Commission & Maintain

Seat and secure the hinged grate; schedule periodic clean-outs of the sediment bucket and trap, especially ahead of storm seasons.

Case Study: Precast Garage Odor & Ponding Fix

A precast parking structure reported nuisance odors and debris-related ponding at low points. The retrofit specified Zurn Z645 drains with 4" Inside Caulk outlets. The integral trap reduced odor complaints, while the suspended sediment bucket simplified debris removal. After one season, maintenance logs showed faster runoff capture and shorter service intervals with fewer downstream clogs.

Frequently Asked Questions

What’s the advantage of an integral trap?
The built-in trap helps control sewer odors at the drain and provides a convenient cleanout point—especially useful on exposed decks and plazas.
Which outlet connection should I choose?
Match to your piping and detailing: No-Hub (NH) for cast-iron, Threaded (IP) for steel, or Inside Caulk (IC), Inside Gasket (IG), and Neo-Loc (NL) for specific installation preferences—commonly in 3", 4", or 6" sizes.
Is the sediment bucket included?
Yes—Z645 is furnished with a suspended aluminum sediment bucket, helping to intercept debris and extend time between downstream cleanings.