


Watts Boiler Pressure Relief Valve, 1,695,000 BtuH, 100 psi - LF174A-100-3/4"
Marsoni
M251S
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Friday, May 29
Watts Boiler Pressure Relief Valve, 1,695,000 BtuH, 100 psi - LF174A-100-3/4"Boiler Pressure Relief Valve; Inlet Type: FNPT; Outlet Type: FNPT; Inlet Size: 3 4 in; Outlet Size: 3 4 in; Body Height: 5 1 8 in; BtuH: 1,695,000; Factory Set Pressure: 100 psi; Max. Temp.: 250 Degrees F; Auto Re Seating: No; Body Material: Lead Free Copper Silicon Alloy; Spring Material: Stainless Steel; Body Width: 2 1 2 in; Standards: ASME, MIL V 18634B
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4.7 ★★★★★
Based on 2013 reviews
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Product Reviews
★★★★★ 4
2000 bmw 232i
Style: Gloss Black Single Slat, Size: E46(1998-2001)4-Door, Style: Gloss Black Single Slat, Size: E46(1998-2001)4-Door
As many things made in China you can't expect not to do anything to them. I had to cut or shave off a bit on the clips to make it work. end results put a smile on my face. Still worth the effort. Just keep that in mind or they will fall off.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 4, 2025
★★★★★ 5
Love it
Style: Gloss Black Single Slat, Size: E90(2009-2011)
Worked great and looks awesome
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 7, 2026
★★★★★ 5
Perfect OEM Fit in Seconds!
Style: Gloss Black Single Slat, Size: E46(1999-2002)2-Door, Style: Gloss Black Single Slat, Size: E46(1999-2002)2-Door
Perfect OEM Fit in 2 seconds!! I’m surprised and Happy and it looks Perfect on my BMW 2002 330ci
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026
★★★★★ 3
Check engine light
Style: Gloss Black Single Slat, Size: G20(2019-2022), Style: Gloss Black Single Slat, Size: G20(2019-2022)
Looks good but will throw a check engine light on your car. The fitment isn’t perfect causing the adaptive vents to show that they are failing even though they are not
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
★★★★★ 5
Quick fix
Style: Gloss Black Single Slat, Size: E46(2002-2005)4-Door
Easily Installed with no modification in under a minute. The finish was a little glossier, then OE.
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Reviewed in the United States on January 28, 2026
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