Marshall Excelsior 3" FNPT x 3" MNPT Back Pressure Check Valve with Bonded Soft Seat

Marsoni

M251S

$502.20

Get it in 3 business days with 1 day shipping. Friday, May 29

Marshall Excelsior 3" FNPT x 3" MNPT Back Pressure Check Valve with Bonded Soft SeatThe Marshall Excelsior ME870SBN 24 Back Pressure Check Valve is designed for high flow transport applications, ensuring reliable performance and safety. This valve features a bonded soft seat and is rated for both LP Gas and NH3. It offers a flow control of up to 449 gallons per minute (GPM) of liquid propane at a 10 PSIG pressure differential. Key Features: Inlet: 3" FNPT Outlet: 3" MNPT Flow Rate: 449 GPM (1,699 L min) for Liquid Propane at 10 PSIG

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This is the second one of these shirts I’ve ordered. I don’t wear ties anymore, so I actually wear this mock turtle neck under a blazer, or a sports coat as my father used to call them. I wore a blue one the other evening and I wore it underneath a plaid blazer. Whoever would guess a T-shirt could be quite so chic. It stretches plenty, it’s light and it’s so comfortable. I have two of them now and I’m deciding on a third one.

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Reviewed in the United States on April 29, 2026

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Holliday

Charlottesville, US

★★★★★ 5

Light and Warm

Size: XX-Large, Color: Royal Blue

Quite comfortable (with a little tape over the label on the inside left) perfect light weight shirt for 40°-50°.

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Reviewed in the United States on April 13, 2026

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Daniel agudelo

Dallas, US

★★★★★ 5

Buenas

Size: Large, Color: Dark Grey

Muy buenas para el sol

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Reviewed in the United States on March 29, 2026

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Amazon Customer

Phoenix, US

★★★★★ 5

A nice, comfortable t-shirt with a bit higher moc neck

Size: Small, Color: White

I wear tee shirts a lot, but, because I need something a little warmer at times I wondered if such a thing as a moc-neck tee existed. This shirt is soft and comfortable, not tight but more tee shirt- like in fit.

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Reviewed in the United States on January 7, 2026

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Nelson Gainza

Whiting, US

★★★★★ 5

Great quality

Size: Small, Color: Dark Grey Long Sleeve

Fast, and exactly as described.

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Reviewed in the United States on May 7, 2026