eVac

The Vast eVac with the two Possible Electrode Rods

Vendor: Vast (formerly Demask Dortmund)

Construction

At a first glance, the eVac looks like a standard vacuum cylinder for cock pumping. The tube has an internal length of 245mm and a diameter of 50mm. The base is very wide with a diameter of 105mm and 10mm thick with rounded edges. The large base helps to reduce pressure on the pubic bone and makes creating a vacuum seal easier. Another attribute that sets this toy apart from other vacuum cylinders is the vacuum valve sitting on the side instead on top. The valve is a standard valve so you can use the eVac with most of your existing pumps and hoses like from LA Pump or Thickwall Cylinders.

On top of the cylinder is a short stainless steel tube with an M12 outer thread. It is tightly screwed and airtight foamed against the acrylic top. Through this tube you thread a 10mm steel rod from inside the cylinder. While every rod has a 4mm banana jack on top, the bottom comes in two varieties: The first one features a half-dome with a diameter of 48mm at the bottom and has an overall length of 225mm. The other one is 275mm long, has a rounded tip for urethra insertion and can also be ordered in an 8mm version if your urethra cannot handle 10mm sounds. This rod comes with a half-dome that has a 10mm hole in the middle that leads into a short tube. On the side of the tube there is a little screw with a 3mm hex to fix it on any height. To keep the rod in place inside the cylinder it is fixed with a cap nut that has a rubber seal inside for an airtight closure of the cylinder.

Detail of the Sounding and Half-Dome Ends of the Two Electrodes

Like all products leaving the workshops of Vast, the eVac is top notch quality: The cylinder is made out of thick and sturdy acrylic. The individual parts are glued with painstaking attention to detail so there is no messy glue-line visible. The acryl has been flamed thoroughly so the tube it is completely clear while the top and the base is solid black. All metal parts are stainless steel (resp. the cap nut has a brass interior) with flawless finish, all weld seams have been smoothed,

Playing with the eVac

The first thing my testees noticed was the relatively small vacuum cylinder of the eVac. This is actually a feature because through the smaller volume, the vacuum take effect more quickly and even small pump movements will produce noticeable results. In combination with the wide base for even distribution of the cylinder’s rim down-force, it is a pretty comfortable vacuum cylinder compared to others.

Detail of the Vacuum Valve and the Cap Nut to Fix the Electrode

The pièce de résistance of course is the rod-shaped electrode. The “gentler” one of the two is the simple half-dome one. You can either use it for pleasure play by positioning it contacting a large area of the glans already. This was the e-stim stimulation will basically stay the same, adding to the heightened sensitivity and vacuum sensation of the dick while you keep pumping. More devious of course is placing the electrode just a bit away from the dick. As you keep pumping and the dick keeps growing, the penis tip will make contact at some point, getting a shock and go soft a bit – until you pump a bit more, it gets harder again and the cycle starts over.

The eVac equipped with the Sounding Electrode

A bit more intense is the sounding electrode. You can approach this toy from two angles: First, just play the same game of short touching as with the half-domed one. But since the sound’s tip has a smaller surface area, the shock of touch will be more intense and pointed. Second, you can of course insert the tip into the urethra. This way there is an initial e-stim connection right away. As you start pumping, the sound will penetrate the dick further, adding a deeper stretch sensation while the e-stim sensation will fade a bit due to the larger contact area.

Inserting the half-domed electrode is a bit of hassle since the rod if considerably shorter than the cylinder. My recommendation: Put the half-dome onto a silicone dildo’s glans. The silicone’s stickiness will keep the electrode in play for easy navigation. Since the sounding rod is way longer, you do not have the problem with that electrode.

Detail of the Banana Jack and the Adjustable Half-Dome of the Sounding Electrode

Naturally, the eVac’s rod is a monopole. This means, you will need to connect an anal or scrotal electrode to the same channel as the rod. I have seen a prototype of a sheet electrode to be put below wide base. If you are interested, I am pretty sure Vast can manufacture something on demand.

Since the complete rod is one big pole, a word of warning when handling this toy while playing on your own. Especially when the tip of the toy has not touched your dick yet, touching the rod barehanded will let the currency flow through your arm and potentially through your heart! Because of that, for selfplay, I recommend wearing rubber gloves to prevent accidents from happening.