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โก Keep your compressor running smooth โ no leaks, no limits!
The Hromee Air Compressor Check Valve Kit features a robust 1/2 inch MNPT brass construction with stainless steel springs and fluoropolymer poppets, delivering reliable backflow prevention at up to 450 PSI and 20 SCFM airflow. Designed for easy maintenance and compatibility with multiple unloader fittings, this 4-piece kit ensures optimal compressor efficiency and longevity.






















| ASIN | B07MHGPT63 |
| Best Sellers Rank | #48,724 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #110 in Air-Compressor Accessories |
| Brand | Hromee |
| Brand Name | Hromee |
| Connector Type | Barb, Push to Fit |
| Customer Reviews | 4.4 out of 5 stars 1,120 Reviews |
| Exterior Finish | Brass , Stainless Steel |
| Item Dimensions | 4 x 4.6 x 1 inches |
| Item Weight | 4.64 ounces |
| Item dimensions L x W x H | 4 x 4.6 x 1 inches |
| Manufacturer | Hromee |
| Manufacturer Part Number | HR4011 |
| Material | Brass |
| Material Type | Brass |
| Maximum Operating Pressure | 450 psi |
| Maximum Pressure | 450 psi |
| Model Number | HR4011 |
| Number of Items | 4 |
| Number of Packs | 1 |
| Number of Pieces | 4 |
| Number of Ports | 2 |
| Outlet Connection Type | MNPT |
| Set Name | Kit |
| Size | 1/2 inch |
| Thread Size | 1/2 inch |
| Thread Type | NPT |
| Unit Count | 1 Count |
| Valve Type | Check Valve |
G**D
Still working a month in
Works as advertised
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.
C**G
Perfect
Fit great no leaks
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.
D**N
Great deal and fast shipping.
My compressor always leaked down to 0 in just a few hours. Holds 195 constantly now. I don't turn it on unless I need it but it always has pressure.
V**G
Everything you need. Great price
Worked great. Very solid kit
A**J
Leaks. Seller stands behind product.
Low quality knock-off part is leaking. I removed it and looks clean with no obstructions. I can hear the check valve activate, but air continues to get through to the unloader. Update: seller stands behind product and warrantied it. My confidence and review are adjusted.
R**L
as advertised
perfect fit, works as it should
C**E
in tank check valve
good quality, fit and worked perfectly
A**R
Replacement for old compressor tann
Works as it should. Quick connection connected well and hasn't leaked. Over a year ownership.
G**O
Fit great in Devilbiss Pro 4000 air compressor
Perfect replacement for the Devilbiss Pro 4000 air compressor, although it was slightly longer than original. I have to point out that true measurement would have you looking for a different size, I think I wasted hours looking for 3/4 Inch instead of 1/2 but EVERYTHING said this air compressor original was 1/2 inch so I trusted it and ordered this. After ordering, I googled about size and learned when it comes to these kind of fittings size is never 'actual'. Fancy that, learned something new! Glad I found a manual and a parts list for this particular unit or I never would have known and probably ordered wrong size.
B**R
Good replacement part
Good replacement part for craftsman 2 hp 27 gal. Compressor.
C**S
Worked great
Compressor would stall and trip breaker on 2nd start ,I knew check valve was bad ...for 5 years..lol. All good now.
Trustpilot
3 weeks ago
1 week ago