Review on ⚙️ Milton S-1750 Safety Exhaust Coupler: 1/4" Body, 1/4" FNPT, Red - Shop Now! by Muhammad Balding

I liked the first one I bought as it worked great with my old industrial fittings and the heavy duty V-Series that I wanted to use for the mills and blast room. I bought 6 more and 4 of the 6 leak when unplugged. The red sleeve can move slightly towards the end of the fitting and allow air to escape. Simply moving or hitting the fitting during operation will cause air leakage. 3 out of 7 don't lick. UPDATE: After contacting Milton and telling them 4 were leaking they offered to replace the couplers with much cheaper couplers or ship the same product when it becomes available again. I decided to wait for the product I needed. There was only one replacement. I had to contact them again and they sent 3 more. 2 out of 4 replacements are leaking badly and one of the originals started to leak. There is no quality control, the product is made in China and the customer service is not up to scratch. I ordered 2 identical 5-in-1 connectors from another popular brand that is mainly made in the USA. Unfortunately, they are also made in China, but are not yet leaking. Another brand requires more force to move the jack. Time will tell if the design is different enough not to leak or if it becomes very difficult to use. Milton 5 in one is junk!