I have an airpump (LaPump) & 2
Bathmate hydropumps (BM
Hydromax 7 and
Hydromax 9 extreme).
What I can say as a newbie,
bathmate (even on less power, only around 50-60% and only 3min sessions) seems to directly give me discoloration like hell. So I directly stopped using it after a few short sessions. Need to condition my dick first before using them again.
With an air pump it's not a problem with discoloration, even when I've tested it a few times and used it on 2.5inHg for 2x20min LOL
But another question, I think the
MityVac of MoS is able to be used as waterpump too (
@DLD), so why you wanna spend more money and go for the
bathmate?
I would better go for a 2nd pump
cylinder here instead of ordering a BM

For the price of a BM you could even get 2 more
cylinders.
Then you could pump like the pros:
Starting with a slow sized
cylinder and each 10-20min session you use the next bigger one. Then your dick would become as thick as a coca cola can!
For example: 1st session: 2"
cylinder; 2nd session: 2.25"
cylinder; 3rd session 2.5"
cylinder