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Zurn Z624 - Isolation Deck Drain

Zurn Z624 - Isolation Deck Drain

Zurn Z624 - Isolation Deck Drain

$1,971.20


FREE SHIPPING
SKU Z624-2NH

The Zurn Z624 is purpose-built for floating slab and isolation deck installations. Its design helps accommodate structural movement while providing dependable drainage through the slab assembly. Whether in plazas, rooftop decks, or construction systems employing isolation techniques, it blends functionality and durability.

Key Features

  • Dura-Coated Cast Iron Upper & Lower Bodies: Strong and corrosion-resistant construction that holds up under load and weather exposure.

  • Clamp Collar with Weep Holes & Neoprene Flex Gasket: Ensures a secure seal with the deck membrane while allowing internal pressure equalization and leakage control.

  • Isolation Nipple & Slotted Grate: The isolation nipple offsets structural constraints, and the slotted grate enables surface drainage while helping prevent debris ingress.

Downloads:

Product Codes: Z624-2NH, Z624-3NH, Z624-4NH, Z624-6NH, Z624-2NL, Z624-3NL, Z624-4NL, ZN624-2NH, ZN624-3NH, ZN624-4NH, ZN624-6NH, ZN624-2NL, ZN624-3NL, ZN624-4NL, Z624-2NH-C, Z624-3NH-C, Z624-4NH-C, Z624-6NH-C, Z624-2NL-C, Z624-3NL-C, Z624-4NL-C, Z624-2NH-G, Z624-3NH-G, Z624-4NH-G, Z624-6NH-G, Z624-2NL-G, Z624-3NL-G, Z624-4NL-G, Z624-2NH-R, Z624-3NH-R, Z624-4NH-R, Z624-6NH-R, Z624-2NL-R, Z624-3NL-R, Z624-4NL-R, Z624-2NH-TS, Z624-3NH-TS, Z624-4NH-TS, Z624-6NH-TS, Z624-2NL-TS, Z624-3NL-TS, Z624-4NL-TS, Z624-2NH-VP, Z624-3NH-VP, Z624-4NH-VP, Z624-6NH-VP, Z624-2NL-VP, Z624-3NL-VP, Z624-4NL-VP, Z624-2NH-Y, Z624-3NH-Y, Z624-4NH-Y, Z624-6NH-Y, Z624-2NL-Y, Z624-3NL-Y, Z624-4NL-Y

View Our Full Selection of Zurn Drains →

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Zurn Z624 – Isolation Deck Drain

A purpose-built isolation deck drain engineered for floating slab assemblies. The Z624 integrates a compression-style sealing system with an isolation interface and a rugged top to maintain drainage performance while helping protect membranes and finishes as the deck moves.

In technical terms, the Z624 couples Dura-Coated cast-iron bodies with a clamp collar, flexible gasket, and an isolation nipple to decouple the finish deck from structure. In plain English: it’s a tough drain that tolerates slab movement and keeps water moving without compromising your waterproofing.

Zurn Z624 installation schematic for isolation decks showing clamp collar, gasket, isolation interface, and drain body location
Z624 – Isolation Deck Installation Concept

Key Features

  • Isolation design manages relative movement between the floating deck and structural slab.
  • Compression clamp collar with flex gasket for a reliable membrane tie-in.
  • Dura-Coated cast-iron construction for long-term durability in demanding environments.
  • Heavy-duty grate (round) intended for deck traffic; serviceable for routine cleanouts.
  • Outlet families: typically No-Hub (NH) and Neo-Loc (NL)—match to project piping.

Where Z624 Excels

Use the Z624 on podiums, terraces, breezeways, and corridors built on floating slabs. The isolation components help the drain tolerate thermal and structural movement, while the clamp collar supports a dependable waterproofing interface.

Benefits (Plain English)

  • Fewer callbacks by preserving membrane integrity as decks shift.
  • Smoother finishing thanks to a robust top and service-friendly access.
  • Specification flexibility with common outlet families and accessory options.
Zurn corporate logo
Zurn – Isolation Deck & Finish-Floor Drainage
Zurn Z624 dimensional schematic highlighting body components, clamp collar, and grate assembly
Z624 – Dimensional & Component Schematic

Specifications at a Glance

Type: Isolation deck drain

Body: Dura-Coated cast iron

Seal: Clamp collar + flex gasket

Isolation: Isolation nipple/interface for floating slabs

Top: Heavy-duty round grate (serviceable)

Outlets: NH / NL families (sizes per submittal)

Always verify dimensions, outlet type/size, and furnished options on the project submittal.

Installation Highlights

1) Rough-In on the Deck

Locate the drain per slope plan; ensure support and alignment with waterproofing details.

2) Seal & Isolate

Integrate the membrane via the clamp collar; install the flex gasket and isolation interface to accommodate movement.

3) Finish & Commission

Set the grate flush to finish and water-test. Add secured hardware where required by the specification.

Case Study: Breezeway over Occupied Space

A multifamily complex experienced membrane stress and drain cracking on a breezeway built on a floating slab. Replacing legacy drains with Zurn Z624 helped decouple deck movement from the drain connection. After one seasonal cycle, facilities reported no leaks at drain penetrations and easier cleanouts thanks to the serviceable grate.

Frequently Asked Questions

What makes a drain “isolation deck” specific?
It’s designed for floating slabs that move independently of the structure. Isolation components and a compression seal help maintain drainage and waterproofing continuity through movement.
Which outlet connection should I select?
Match to your piping: NH (No-Hub) for cast-iron couplings, or NL (Neo-Loc) where a mechanical seal is preferred. Confirm sizes and compatibility on the submittal.
Can I add debris capture?
Yes—specify a sediment bucket (-Y) or other debris-management accessories where sand, leaves, or construction grit are expected.