★★★★★ 5
s tier quality
superior quality, single cast aluminum 👍
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Reviewed in the United States on May 2, 2026
Oatey 4 In. PVC Backwater Valve
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Oatey 4 In. PVC Backwater ValveElastomeric seal in quick action flapper ensures a watertight seal Threaded access cap incorporates a neoprene seal for positive sealing & can be tightened or removed by hand Valve hub fits DWV pipe & can be adapted for sewer & drain pipe
Quick Dispatch:
Your Oatey 4 In. PVC Backwater Valve orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.5 ★★★★★
Based on 983 reviews
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Product Reviews
★★★★★ 4
Too Tight but It Works
It doesn't really sit on very well to be honest, it tends to sit TOO tight in my opinion. Taking it off can be a hassle but at least it gets the job done, durability is good, finish is great, obviously easy to use.
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Reviewed in the United States on April 28, 2025
★★★★★ 5
BMW F25
Saved me when tried to change the oil. Great price
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Perfect fit
This product was a perfect fit on our 2009 BMW 328i. It was alittle difficult connecting the hose at the bottom because my husband has big hands but I was able to help tighten the screw Due to my smaller hand size Overall very good product and fast delivery
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 5, 2023
★★★★★ 5
Fast delivery, quality products
Fast delivery, quality products
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2025
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