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Hermetic Spun Copper Design
Magnetic Checking Action
Built-In 30 Mesh Stainless Steel Strainer
Can Be Installed In Any Position
Inlet Connection Size1/4” ODF Solder
Outlet Connection Size1/4” ODF Solder
Maximum Working Pressure (psig)800
Nominal Tons R-22 Suction 40°F @ 1 psiSuction 0.4, Liquid 2.6
Nominal Tons R-404A 40°F @ 2 psiDischarge 0.59, Suction 0.34, Liquid 1.77
Nominal Tons R-410A 40°F @ 2 psiDischarge 0.8, Suction 0.48, Liquid 2.59
ApprovalsUL/CUL File Number SA5312
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Reviews
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TERIQ NEWTON
Jul 29, 2025
EMERSON Check Valve ACK-4I've been on a quest to find this item, and I'm so thrilled to see one that looks exactly like my old one.HelpfulUnhelpful - I
Issa Nammour
Mar 05, 2025
EMERSON Check Valve ACK-4A walk in the parkHelpfulUnhelpful - M
MIKE WOLFORD
Nov 04, 2024
EMERSON Check Valve ACK-4Easy to locate and affordable pricesHelpfulUnhelpful - K
Kenneth Adair
Apr 13, 2024
EMERSON Check Valve ACK-4Exceeded my expectations!HelpfulUnhelpful - A
Anonymous user
Nov 25, 2022
EMERSON Check Valve ACK-4All was ok! No problems whatsoever.HelpfulUnhelpful
EMERSON Check Valve ACK-4
✔ In Stock (Can ship in 5-7 days)

Online Support 24/7
12 Months Warranty for New Products
30 Days Money Back Guarantee

