







🔧 Keep your compressor running smooth—no backflow, no downtime!
The Hromee In Tank Check Valve Kit is a robust brass and stainless steel valve designed to prevent backflow in air compressor systems. Featuring 1/2" MNPT and 1/8" FNPT ports, it supports up to 450 PSI and 20 SCFM airflow. With dual unloader fittings included, it offers versatile installation options and easy maintenance, making it an essential upgrade for reliable compressor performance.





















| ASIN | B07MHGPT63 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #86,742 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #252 in Air-Compressor Accessories |
| Brand | Hromee |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,077) |
| Date First Available | May 21, 2019 |
| Exterior Finish | Brass, Stainless Steel |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 4.6 ounces |
| Item dimensions L x W x H | 4 x 4.6 x 1 inches |
| Item model number | HR4011 |
| Manufacturer | Hromee |
| Maximum Operating Pressure | 450 Pound per Square Inch |
| Number Of Pieces | 4 |
| Number of Ports | 2 |
| Outlet Connection Type | MNPT |
| Part Number | HR4011 |
| Product Dimensions | 4 x 4.6 x 1 inches |
| Size | 1/2 inch |
E**S
Perfect Fit
Functions as deigned. I measured closely and it matched the one I replaced perfectly.
E**S
Was An Exact Replacement for my Compressor
I purchased this to use on my Campbell Hausfeld compressor which I bought used. The one that came with it was not unloading properly causing the compressor to struggle with restarting under pressure. That has been resolved with this valve. I was a bit surprised it did not come with the nut and compression for where the 1/2" line goes into the top of the valve. But it was not in the picture so can't really complain about it. After the installation it was leaking around the top connection since there was no brass compression ring. I had to buy one at the hardware, which was not a huge deal, to stop the leak - which it did. Just something to be aware of if you are planning to pick one of these up. Other than that, it went together smooth and resolved my compressor restart issues as expected. I can totally recommend this valve for others needing to replace one of this size. It's well made and comes with two fittings (minus the top nut and compression ring) and all threads have sealant making the installation pretty straight forward.
M**O
Really good quality. All brass.
This valve is better than what my Dewalt compressor came with. The original one rusted and seized up on me. This one is all brass.
M**Y
Good Replacement For Craftsman Check Valve
I had acquired a Craftsman 25 gallon air compressor several years ago, but never used it, so it basically sat in my shed for years until I recently decided to get it up and running. I knew I needed to put in some fresh oil and check the main parts, including the check valve. When I took the old one out, it was somewhat corroded but still in working order, but I wanted to replace it with a new one just to be safe. Lo and behold, the exact replacement piece was no longer available. That's when I searched around and found this one, Hromee Air Compressor Replacement Components Brass 1/2 Inch MNPT Compressor in Tank Check Valve Kit . While the dimensions were slightly different (this one was slightly longer), it fit the tank perfectly and was a good replacement part. From what I can tell, the compressor is working perfectly and I have a brand new compressor for my shop. I would say just measure carefully and compare the old one to the new one as best as you can before ordering, because I actually had ordered another one first and top compression inlet was the wrong size so I had to send that one back. I would recommend this kit for replacing your check valve.
T**R
Fits Kobalt 80 gallon air compressor!
I purchased this for a Kobalt 80 gallon 240 volt 5 HP air compressor and it works great.
R**L
as advertised
perfect fit, works as it should
D**M
Inferior product
Did not work. Leaked air immediately.
K**N
Great quality
Great quality just what I needed nice little kit for the price came with all possible options. I love when things workout and this made it possible. Incase anyone is wondering I put this on my 80gallon kobalt air compressor 2 phase 5hp motor worke great.
C**E
good quality, fit and worked perfectly
A**R
Works as it should. Quick connection connected well and hasn't leaked. Over a year ownership.
A**R
Fonctionne bien jusqu'à présent
M**D
J ai du acheter un adaptateur 1/2 fem OD a 3/8 in OD et ca fonctionne très bien pour un compresseur campbell hausfield :WL 505806
Y**N
Fonctionne très bien
Trustpilot
2 days ago
1 day ago