Single Slope extension
Returns on all eligible orders
All sale items are final sale once open
Extend Your Shower. Keep the Perfect Slope.
Custom Size. Same Reliable Waterproofing.
Need to make your HYDRO-BLOK Single Slope Shower Pan a little larger? The HYDRO-BLOK 18″ × 72″ Single Slope Shower Pan Extension (HBSSSP1872EXT) gives you the flexibility to expand your shower footprint while maintaining proper slope and full waterproof integrity.
Designed for a Seamless Connection
Built with the same 100% waterproof XPS closed-cell foam core, reinforced with fiberglass mesh, and finished with a modified cement coating, this extension integrates cleanly with any HYDRO-BLOK Single Slope Pan for a continuous, tile-ready surface.
Compatibility: HYDRO-BLOK Single Slope Shower Pans
Why Installers Choose It
Perfect Slope Alignment – Extends your shower without altering pitch
Custom Fit – Expand layouts for larger walk-in designs
Full Waterproof Protection – Same proven HYDRO-BLOK construction
Easy to Install – Lightweight and trims cleanly on-site
Available Sizes
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Single Slope 18" x 72" Side Extension - $477.91
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Single Slope 72" x 12" Pan Extension - $337.35
Next Day Pickup
Next Day Pickup
Need your Hydro-Blok products fast? With ATS Supply’s Next Day Pickup, you can place your order today and pick it up at our warehouse tomorrow—ready when you are.
✅ Order Cut-Off: Orders must be placed by 1:00 PM on a business day to qualify for next-day pickup.
✅ Pickup Time: Orders will be ready after 1:00 PM the following business day.
✅ Order Confirmation: Once your order is processed, you’ll receive a notification to schedule your dedicated pickup time.
✅ Identification: At pickup, you must present valid photo ID and proof of purchase. If someone else is collecting on your behalf, please inform us when scheduling your pickup appointment.
✅ Uncollected Orders: Orders not collected within 7 days will be returned to our distribution center. A 10% restocking fee will be deducted from your refund.
Simply choose Store Pickup at checkout, and we’ll have your Hydro-Blok system, tools, or accessories ready on time. It’s the fastest way to get your materials and keep your project moving.