There is a thin styrofoam at the center connected only at 4 points to the thicker styrofoam. What's the function? Is it supposed to be removed?

Yes you can remove it to measure how low you want to cut your drain pipe. Depending on the complexity of the project you can leave it on as well. I have done both ways and it works fine on different occasions

Can the tray be cut to install a corner seat?

Absolutely. Long razor knife does the trick

Do I need a pan or does act like it?

This is your pan. You seal the edges and then test to see if it holds water and then tile over it.

Schluter Systems Kst1220 1830 Kerdi Center Outlet Shower Tray 48x72

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MOP$6404

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Sold byAmazon MacauDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚿 Elevate your shower game with effortless waterproofing and sleek design!

CENTER DRAIN PLACEMENT - Optimized drainage for sleek, modern aesthetics
MORTAR FREE INSTALLATION - Lightweight expanded polystyrene eliminates heavy mortar beds
LOW 1 1 4 PERIMETER HEIGHT - Simplifies curbless shower designs for seamless bathroom flow
SPACIOUS 48 X 72 FOOTPRINT - Generous dimensions for a luxurious shower experience
INTEGRATED KERDI WATERPROOFING - Built-in moisture barrier for lasting protection

The Schluter Systems KST1220/1830 Kerdi Center Outlet Shower Tray is a 48" x 72" prefabricated, sloped shower base made from lightweight expanded polystyrene. Featuring integrated Kerdi waterproofing and a center drain, it eliminates the need for a mortar bed and supports modern curbless shower installations with its low 1-1/4" perimeter height.

Specifications

ASIN	B07KQNDJVL
Assembly Instructions Description	Included with the product
Best Sellers Rank	#89,667 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #30 in Shower Bases & Pans
Brand	Schluter
Brand Name	Schluter
Color	Clear
Customer Reviews	4.6 out of 5 stars 207 Reviews
Finish Type	Natural
Finish Types	Natural
Installation Type	Screw-In
Is Framed	No
Item Dimensions D x W x H	1.25"D x 48"W x 1.25"H
Item Weight	7.6 Pounds
Manufacturer	Schluter Systems
Manufacturer Part Number	KST1220_1830_B
Material	Expanded Polystyrene
Material Type	Expanded Polystyrene
Product Dimensions	1.25"D x 48"W x 1.25"H
Required Assembly	No
Shape	rectangular prism
Style	Modern
UPC	303945492788 691327654412
Unit Count	1.0 Count

Reviews

B**R

22.04.2026

J**D

13.01.2026

M**.

21.07.2025

A**R

10.12.2025

A**X

30.11.2021

G**T

13.05.2025

E**R

19.08.2025

A**R

15.03.2026

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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