Having an electronic/auto vacuum system is truly unpredictable. If you can reliabilty, and hopefully be able to verify that there is a safety system to prevent it goes past a certain vaccum pressure at any given point, then the
MityVac cylinder is perfectly fine. This is me bringing my experience of
cylinder failures due to abnormal vacuum pressure from automated vacuum systems.
By the way, you definitely want to have a vacuum system goes past 5inHg. 5inHg is just a starting point. Upper safety level is 10inHg. 15inHg is considered as reaching unsafe level, but for some, it's a miracle pressure. Most of us, stay far away from that pressure for now.
Most automated built in
cylinders pressure are very low end in terms of perforance. The built in system has a snap-on vacuum valves that is not fully compatible with the
MityVac cylinder. However, is see some modified the mini pump systems to match. The
cylinder may be too large for the mini pumps to effectively pull all the air out. Most who use the automated system use a mid to high end vacuum pumps, powered by large battery pack or plugged directly into the wall socket. LeLuv is way too underpowered by a 3.7V pump motor.
I'm always placing safety at the forefront of PE. Without safety first, we have broken penises left and right.
To provide clarification, internal pressure for an average erection is between 3.5inHg and 4.5inHg. This is why we want an external vacuum pressure to mirror the internal pressure. When we pump, we need to raise the internal pressure to equalize the vacuum pressure. You can feel where you are during the pumping where your internal pressure is at. Let's say during pumping, your penis is fully erected and your vacuum pressure is around 3inHg, if your glans feels comfortable without any expansion, that is your internal pressure. The moment you start feeling your glans starts to have a dull achy feeling while fully erected under pressure, you are reaching and passing your natural internal pressure. This is where you start logging constantly. Pressure increase should not be done at 0.5inHg every 2 weeks. Sometimes longer. I like to increase 0.5inHg every 3 to 4 weeks, and when I'm dead certain that my glans is ready for the steady increase.
The connected valve that the mini pumps over is a quick disconnection I165T model, where as the one on the
MityVac and most manual pumps are standard 1/4in or 6mm threaded quick disconnector system. If you're talking about the LeLuv iPump, then yes, they are using a male-female 1/4in pump system. You can even remove the hose and put the hose over the
MityVac cylinder's 1/4in barb as an aftermarket retrofit.