I initially purchased this to use as an isolation valve in a smaller SPD setup. I connected it directly to my pump and then to my system and tried checking vacuum.I noticed right away i was unable to pull a full vacuum on the system. I broke everything down and checked all my connections. Then reconnected everything and proceeded to test my vacuum again.The second test resulted in almost the same result. I was able to vacuum down to about 1500 microns before it stalled and couldn't evacuate it any further. What's worse upon closing the valve my vacuum pressure started to increase which made me think it was a leak in the system.After attempting to find a leak in the system, there was none, i connected the vacuum pump to the valve and the valve directly to my vacuum gauge. I was able to replicate the issue when closing the valve. As there was no other source of leaks present it's clearly the valve.The product did not work as intended. Don't be cheap like me and save yourself the headache of these "discount" isolation valves. DO NOT BUY.
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