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Watts Reduced Pressure Zone Backflow Preventer, Cast Iron, Watts 909 Series, Flanged Connection - 2 1/2 DLF909-OSY

Marsoni M251S
Sale price$1881.72
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Watts Reduced Pressure Zone Backflow Preventer, Cast Iron, Watts 909 Series, Flanged Connection - 2 1/2 DLF909-OSYReduced Pressure Zone Backflow Preventer; Series: Watts 909; Size: 2 1 2 in; Connection: Flanged; Body Material: Cast Iron; Temp. Range: 33 Degrees to 110 Degrees F; Max. Temp.: 110 Degrees F; Max. Pressure: 175 psi; Width: 24 in; Length: 46 in; Standards: ASSE 1013, AWWA C 511 92, CSA B64. 4
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Exchange/Return Notes
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4.0 ★★★★★
Based on 1904 reviews
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L
Verified Purchase
Lance M.
Grantham, US
★★★★★ 5
It's a Filter!
Size: 97133L1000&28113AA100
Fit great! Just look on youtube how to put in! I'm not in a particularly dusty area, but the air cabin filter was a disaster after only a year. Will buy again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
E
Verified Purchase
ed gasior
Lowell, US
★★★★★ 5
Easy
Size: CF11966&CA12166
Perfect fit. Easy to install. Good price. When changing the cabin filter the screw removal is a little easier if you notch out the plastic in front of it. Its behind the glove box and is not noticeable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
J
Verified Purchase
James B. Smith
West Palm Beach, US
★★★★★ 4
Filter My Cash
Size: CF12150&CA10262
Awesome quality filters and fit just like original equipment. Dealer wanted $140.00 to install. $21 And ten minutes later I was done. Got them next day.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
J
Verified Purchase
Jessie
Carnegie, US
★★★★★ 5
Great product
Size: CF10134&CA11476
Price great. Fit perfectly
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
S
Verified Purchase
Sam E
Carnegie, US
★★★★★ 5
Perfect fit and high quality.
Size: (Pack of 1)
Good product, not much to say. The product arrived quickly, looks to be of high quality construction, fit perfectly and took me only a couple of minutes to install. I love it when a product is no frills and delivers as advertised. I've used various filters from K&N before and have always had very good success with them so I will be buying more of these for sure when the time comes.
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Reviewed in the United States on November 9, 2025

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