---
product_id: 19968098
title: "Oatey 42725 2 in. Backwater Valve Device for Integral Trap Shower Drain"
brand: "oatey"
price: "3669 kr"
currency: ISK
in_stock: true
reviews_count: 10
url: https://www.desertcart.is/products/19968098-oatey-42725-2-in-backwater-valve-device-for-integral-trap
store_origin: IS
region: Iceland
---

# 2-inch FIP threadway One-piece trap/cleanout design Prevents sewage backup Oatey 42725 2 in. Backwater Valve Device for Integral Trap Shower Drain

**Brand:** oatey
**Price:** 3669 kr
**Availability:** ✅ In Stock

## Summary

> 🚿 Upgrade your drain game—never fear backup again!

## Quick Answers

- **What is this?** Oatey 42725 2 in. Backwater Valve Device for Integral Trap Shower Drain by oatey
- **How much does it cost?** 3669 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/19968098-oatey-42725-2-in-backwater-valve-device-for-integral-trap)

## Best For

- oatey enthusiasts

## Why This Product

- Trusted oatey brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted Oatey Quality:** Over 100 years of professional-grade reliability and support
- • **Deep 3.75-inch Sump Bowl:** Large capacity to handle heavy drainage without clogging
- • **One-Piece Trap & Cleanout:** Simplifies maintenance with easy access and fewer parts
- • **Backwater Valve Protection:** Stops sewage backup, safeguarding your space and peace of mind
- • **Seamless 2-inch FIP Threadway:** Effortlessly integrates with standard plumbing for a secure fit

## Overview

The Oatey 42725 is a 2-inch backwater valve device with an integral trap designed for shower drains. Featuring a solvent weld connection for Schedule 40 DWV pipe, a deep 3.75-inch sump bowl for high capacity, and a one-piece trap/cleanout design, it prevents sewage backup while ensuring efficient drainage. Trusted by professionals for over a century, this PVC valve offers durable, easy-to-maintain protection with a 1-year limited warranty.

## Description

Product Description Oatey Integral Floor Drain with P-Trap is available with an optional backwater device that transforms the drain into a backwater valve, allowing drainage while preventing sewage backup. Oatey products have earned the trust of plumbing professionals for over 100 years. From the Manufacturer Oatey products can be found in residential and commercial applications and have achieved excellent brand name recognition with consumers. All products are backed with the highest quality technical and customer support programs in the industry

## Features

- Trap drain allows for drainage while preventing sewage backup
- Solvent weld over 2 in. Scheudle 40 DWV pipe
- One piece trap drain/cleanout design
- 3-3/4 in. deep sump bowl for large capacity
- Built in 2 in. FIP threadway for backwater device

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Asin | B000BQWR1I |
| Best Sellers Rank | #359,852 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #557 in Bathroom Sink Drains #1,528 in Showers & Shower Parts |
| Brand Name | Oatey |
| Connector Type | connector_type |
| Customer Reviews | 4.5 4.5 out of 5 stars (82) 4.5 out of 5 stars |
| Exterior Finish | exterior_finish |
| Global Trade Identification Number | 00038753427256 |
| Included Components | Backwater Valve |
| Inlet Connection Size | 2 Inches |
| Inlet Connection Type | threaded |
| Item Dimensions | 2 x 2 x 2.25 inches |
| Item Type Name | Backwater Valve Device |
| Item Weight | 22.68 g |
| Manufacturer | Oatey |
| Manufacturer Part Number | 42725 |
| Manufacturer Warranty Description | 1-year limited |
| Material Type | Polyvinyl Chloride (PVC) |
| Model Number | 42725 |
| Number Of Pieces | 1 |
| Number Of Ports | 2 |
| Outlet Connection Size | 2 Inches |
| Outlet Connection Type | FIP |
| Size | 2 Inch |
| Specification Met | ASTM |
| Thread Size | 2 inches |
| Thread Type | FIP |
| Unit Count | 1.0 Count |
| Upc | 038753427256 |
| Valve Type | Backwater Valve |

## Product Details

- **Brand:** Oatey
- **Exterior Finish:** exterior_finish
- **Inlet Connection Size:** 2 Inches
- **Inlet Connection Type:** threaded
- **Item dimensions L x W x H:** 2 x 2 x 2.25 inches
- **Material:** PVC
- **Number of Ports:** 2
- **Outlet Connection Size:** 2 Inches
- **Outlet Connection Type:** FIP
- **Specification Met:** ASTM

## Images

![Oatey 42725 2 in. Backwater Valve Device for Integral Trap Shower Drain - Image 1](https://m.media-amazon.com/images/I/71AzfxTjSFL.jpg)
![Oatey 42725 2 in. Backwater Valve Device for Integral Trap Shower Drain - Image 2](https://m.media-amazon.com/images/I/818yhVj32lL.jpg)
![Oatey 42725 2 in. Backwater Valve Device for Integral Trap Shower Drain - Image 3](https://m.media-amazon.com/images/I/71VZAPJZCzL.jpg)

## Questions & Answers

**Q: Is this a drain trap(pictured) or just a backwater valve?**
A: It is a trap with the option of having a ball check valve to prevent backwater.

**Q: Does the backwater device come with it?**
A: no you have to purchase it separately.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works well if you don't screw it up like I did
*by  on Reviewed in the United States June 9, 2018*

Fits my 1940's basement floor drain "P-Trap drain" just perfectly. Finally got the old one out and this dropped in like a charm.Be aware the rubber rim is thin and not robust material. The seal, when I originally installed it, was very good.However... I tried to lube it up with WD40 after it was installed, thinking that might tighten the seal, since it did upleak a tiny bit when my washing machine is trying to force-feed a tub-full of water down the basement drain (only enough to very slightly fill the drain's cup). However the WD40 corrupted the rubber, causing it to buckle & crinkle and therefore it started leaking way too much.I then tried Dupont Silicone spray, which is supposed to be safe on rubber. I guess it was the volatiles used in the spray delivery, because it buckled again and I had to replace it with a fresh one. Which, thanks to the low price of this item, is not painful.It would be nicer if this had a nice big faux-rubber "O" ring that could withstand some crap instead of a thin, obviously real-rubber skirt, but as long as I don't do anything stupid, I think the seal this provides is solid enough, and will hopefully last a while. Make sure to pair it with a water-leak alarm just in case ;)P.S. Yes my antique cast-iron 1939 version of this ball valve was difficult to get out... it was rusted in there good. Finally the light bulb came on, and I grabbed my sawz-all with a metal-cutting blade and cut a little chunk out of the old collar, after that I was able to chisel it loose and unscrew it. Just don't go deeper than necessary with the sawz-all to avoid damaging the threads in the female portion of the drain in the floor. Hope that helps -- it only took me 14 years to figure out how to get the old one out!! :)

### ⭐⭐⭐⭐⭐ Really Simple Back Flow Preventer
*by  on Reviewed in the United States June 11, 2025*

Easy peasy. You put it in your floor drain, it stops back flows during storm surges etc. Hasn't been through a big storm yet but looks like it should work in theory.

### ⭐⭐⭐⭐⭐ Fixed my slow basement floor drain
*by  on Reviewed in the United States April 28, 2019*

Worked perfectly to fix my basement floor drain that would sometimes drain slowly. I was poking around with the old valve and it seemed like it was getting stuck closed sometimes. I found this, took the old one out, put this one in, and it drains very nicely now. It's a standard design, but still a little akward to remove or install. Google said to use a cold chisel, but I ended up using a small bolt held in the center with vice grips. That allowed me to apply pressure on both sides at once and worked quite well.

## Frequently Bought Together

- Oatey 42725 Backwater Valve Device, 2", White
- Minimprover Internal Backwater Valve,2-F 2" Float Model Flood-Guard for 2-inch Flood Drains,Drain Backflow Preventer for Sewer Flood Protection
- General Specialties Flood-Guard for 2" Flood Drains

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-07-18*