Will this work on an old drain pipe with a 2 1/2 inch inside diameter pipe?

No, this would not fit on a 2.5 inside diameter.

Does it work in a shower drain without a p trap?

My guess is that it should work in your shower drain. A P-trap prevents sewer gasses from entering the home. When full of water it is nothing more than a drain. Give it a try - can;t hurt. VERY pleased with the performance of our seal!

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Oatey 4013846 2 in. Dia. Plastic General Purpose Floor Drain, Black | Seal for 2-Inch Shower, Floor drains Comes in a black finish

Oatey 4013846 2 in. Dia. Plastic General Purpose Floor Drain, Black | Seal for 2-Inch Shower, Floor drains Comes in a black finish

Product ID: 313384290

Details

Brand
Oatey
Item Form
item_form
Item dimensions L x W x H
9.5 x 4 x 8
Material
Rubber
Style
2 Inch Shower

💧Continuous, no-pool drainage

🔧Tool-free, quick install

🚫One-way valve blocks odors & pests

565 kr

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Sold byAmazon Faroe IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚿 Fresh floors, zero fuss—drain smarter, live better!

TRUSTED DURABILITY - Crafted from resilient rubber by Oatey, a brand pros rely on for lasting performance.
EFFORTLESS DRAINAGE - Designed for seamless water flow—no pooling, no backups, just smooth drainage every time.
ODOR PEST BLOCKER - Say goodbye to unwanted sewer smells and creepy crawlies invading your space.
VERSATILE PLACEMENT - Perfect for basements, laundry rooms, and showers—upgrade any floor drain instantly.
HASSLE FREE INSTALLATION - No tools needed—snap it in place and enjoy a fresher home in minutes.

The Oatey 2-inch Plastic General Purpose Floor Drain features a one-way valve that effectively blocks sewer odors and insects, ensuring continuous, no-pool drainage. Its tool-free installation makes it an ideal, cost-effective solution for basements, laundry rooms, and showers. Made from durable rubber, this drain insert is a trusted fix that prevents unpleasant smells without the need for costly plumbing remodels.

Specifications

ASIN	B091S43BTW
Best Sellers Rank	#143,107 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #604 in Bathroom Sink & Bathtub Drain Strainers
Brand Name	Oatey
Color	Black
Customer Reviews	4.5 4.5 out of 5 stars (230)
Global Trade Identification Number	00038753437453
Included Components	Oatey - 43745
Item Dimensions	9.5 x 4 x 8 inches
Item Form	item_form
Item Type Name	Oatey - 43745
Manufacturer	Oatey
Material Type	Rubber
Model	Oatey - 43745
Number of Items	1
Number of Packs	1
Part Number	43745
Style Name	2 Inch Shower and Floor Drain
UPC	038753437453
Unit Count	1 Count
Warranty Description	Warranty.

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565 kr

Duties & taxes included

In stock

Sold byAmazon Faroe IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Faroe Islands.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Good experience, but the tracking updates could be better.

2 months ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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