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Here's a question:

As per the subject heading, what's the difference between a rock-hard pump and a flat pump? Haven't experienced either of these yet, just curious.

Thanks!
F1

When pumping up to max normally at least with classic titan the pump will get so hard you can’t pump it anymore, even using both hands. This is the marble. At about 12-13 months I reached a point that the pump went flat and stayed that way. Only reinflates when you mash the release button. At this point there is no more fluid to pull from reservoir. This is a flat pump. At first I thought maybe I had a leak and was running out of fluid but it’s been doing this for a year and 4 months when maxed. Have a close friend who has same implant as I just 2cms longer w classic pump and he had exact same experience at the 12-13 month time frame also. At this point you are truly maxed out and there’s no more fluid so I stopped pumping except for sex masturbation or if I just want to feel it.

optimally, you want the marble and not the flat pump. Marble means there is more fluid that *could* be delivered to the cylinders but there's just no more room in the cylinders, the fluid can't go any further so the pump is hard as a marble. This also encourages the cylinders to stretch to their max.

Flat pump means you've pulled all the fluid from the reservoir and there's no more fluid available to fill the pump and be sent to the cylinders. Your reservoir is likely as flat as your pump. This is the largest the cylinders will every be. In theory, your cylinders *could* get stiffer/bigger/longer, but you have no fluid to make it so.

You want to make sure you have a large enough reservoir and the proper amount of fluid installed to max out your cylinders before the reservoir is emptied.

There is a second form of "marble" as well. A couple of times the valve in my Titan pump has gotten stuck the wrong way. I have to squeeze very, very hard to get the valve to pop and start refilling. I believe that the times this has happened were when I deflated and then did not do the pump at the end of deflation to put the valve back into fill mode.