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Zeny-vacuum-pump-review, find helpful customer reviews and review ratings for zeny 4cfm 1/3hp electric vacuum pump refrigerant r410a r134a hvac deep vane air conditioner w/ 1/4" flare inlet port at amazon.com. read honest and unbiased product reviews from our users.. About the product: -inlet port: 1/4" flare, warm note: 1)pressure scale:0~400psi, 0~140psi 2)length of hose:1.2m red:1/4''-1/4'' yellow:1/4''-1/4'' blue:1/4''-1/4'' please make sure your manifold gauge is in accordance with this size. any question in using, please contact seller first. a self-paying vacuum pump adapter, cfm: when looking for the best vacuum pump, check the cfm, or cubic feet per minute.the cfm tells you the vacuum flow speed, and it determines how quickly you can get air out of a refrigeration system or a tank. cfm ranges from 1.5 to 11..

High efficiency and low noise, heavy-duty aluminum alloy casing oil drain plug positioned at bottom of oil reservoir internal high volume cooling fan for extended use exhaust port with exhaust cap, direct drive motor allowing easy starting which is maintenance free comes with a bottle of vacuum oil specification: volta, kozyvacu 5cfm 2-stage rotary vane vacuum pump (5.0cfm, 40micron, 1/2hp) for hvac/auto ac refrigerant recharging, degassing wine or epoxy, milking cow or lamb, medical, food processing etc. 4.2 out of 5 stars 217 $109.99$109.99 ($36.66/item) get it as soon as tue, jul 7