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 drainage, no pooling

🔧Tool-free, hassle-free install

🚫One-way valve blocks odors & pests

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Description

🚿 Seal in freshness, seal out worries—drain smarter, live cleaner!

SLEEK BLACK FINISH - Modern black design blends seamlessly with contemporary bathroom and utility spaces.
ODOR PEST DEFENSE - One-way valve seals out sewer smells and unwanted insects, keeping your space fresh and hygienic.
DURABLE RUBBER BUILD - Crafted from resilient rubber to ensure long-lasting performance and reliability.
EFFORTLESS WATER FLOW - Designed for continuous drainage to prevent water pooling, ideal for basements, laundry rooms, and showers.
QUICK TOOL FREE SETUP - Install in minutes without any tools—perfect for busy professionals who value efficiency.

The Oatey 2-inch Plastic General Purpose Floor Drain features a one-way valve that prevents sewer odors and insects from entering your home. Its continuous drainage design stops water pooling, making it perfect for showers, basements, and laundry rooms. Finished in sleek black and crafted from durable rubber, it installs easily without tools, combining functionality with modern style.

Specifications

ASIN	B091S43BTW
Best Sellers Rank	#154,067 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #644 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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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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B/.111

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered 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 Panama.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Received my product in pristine condition. Great service overall.

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