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Watts 150 psi Automatic Air Vent Valve, Brass, 1 in Inlet - FV-4M1- 1

Marsoni M251S
Sale price$38.97
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Watts 150 psi Automatic Air Vent Valve, Brass, 1 in Inlet - FV-4M1- 1Provides automatic air venting for hot or cold water distribution systems, this WATTS automatic air vent valve,uses a float to actuate the valve plug which is located at the top of the valve. Once the air is displaced and the system pressure is sustained, the valve plug seals and prevents any water from escaping from the system. This valve can also purge air that may be in the water system. Model can be disassembled for maintenance.
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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.
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4.1 ★★★★★
Based on 1114 reviews
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A
Verified Purchase
Amazon Customer
Draper, US
★★★★★ 5
Fits car based on Amazon rec
Fit perfect and performs as expected
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
S
Verified Purchase
Steven M Miller
Whiting, US
★★★★★ 5
Looks as good as the genuine one.
This looks like a quality product, great for the price. It looked identical to the genuine Honda part but was $20 cheaper than the Honda one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
K
Verified Purchase
kiki
Port Orchard, US
★★★★★ 5
Self replacement.
Good fit.
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Reviewed in the United States on April 13, 2026
D
Verified Purchase
Darren Reeves
Whiting, US
★★★★★ 5
Perfect replacement for Cabin Filter
Works great, fits vehicle, easy to install
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Reviewed in the United States on November 3, 2025
F
Verified Purchase
Falcon
Draper, US
★★★★★ 5
Nice fit!
Fits a 2016 Hona Civic as promised...
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Reviewed in the United States on March 8, 2026

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