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Quality of threads cut into new vacuum pump cylinder?

Quality of threads cut into new vacuum pump cylinder?

Multiple questions; Thanks to all for any advice.
My first commercial vacuum pump cylinder finally came in from Boston Pump. Was impressed with the packaging and quality until I unscrewed the female quick disconnect coupling to check out the cylinder threads. Seems to be vertical lines of threads missing in 2 separate places at least 80% of the way up. There’s also black “dust” looking areas which don’t clean off - maybe it’s burned acrylic?. The female coupling screws in fine with normal resistance. Is this a normal thing for PE cylinders? I really don’t know the average quality of cylinder threads. Also I haven’t been able to test this rig out because I only ordered some male couplers from McMaster yesterday. Other than that the cylinder seems fine.

Assuming the threads are bogus has anyone successfully tapped their own threads in acrylic? If it doesn’t hold vacuum at the threads I’m debating tapping it up a size and using a larger quick disconnect, or even just permanently sealing another kind of fitting at the top that the female quick disconnect and o-ring could screw into.

Any opinions or advice would be appreciated before reaching to to BP customer service and dealing with a return as it took weeks to arrive the first time around.

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I think I would forward those pics to Boston Pump and ask for a replacement cylinder on expedite. Those threads are horrible and looks like you will have a leak for sure.

The primary goal of PE should be to make your penis as healthy as possible in both form and function. If you do that, increased size will follow.

Originally Posted by gprent

I think I would forward those pics to Boston Pump and ask for a replacement cylinder on expedite. Those threads are horrible and looks like you will have a leak for sure.

+1

Something very wrong there.

Starting Stats: BPEL 7.0¨ x MEG 5.3¨ (4th Nov 2015)

Current Stats: BPEL 7.83¨ x MEG 5.6¨ (14th June 2018)

The Dream: BPEL 8.1¨ x EG 6.1¨ (Not sure if the wife supports ¨the dream¨)

+2
You want a replacement for that cylinder.
Tapping plastic can always be tricky and it is prone to cracking.
You want to just send that back…

Worst case, if you do mess with it you want to find a finer thread fitting. The finer the thread the more successful your chances are.

Okay! Thanks. Contacted them through their site form with a C/C & photos sent to their email address. Will update here when a response and resolution is reached.

Not thrilled with the customer service.

Not thrilled with the customer service. Here is it stripped of links and attempting to be neat.

Originally Posted by Me
Good evening. I just received the flat-bend cylinder in the mail today. Order ______.
Upon initial inspection it appeared to be in perfect condition, however once I unscrewed the female quick disconnect coupling and looked at the threads cut into the cylinder, I noticed something very wrong there. There are vertical lines of threads missing in 2 separate places at least 80% of the way up the threads. There’s also black “dust” looking areas which don’t brush off - it looks like burned or melted acrylic. I’ve taken photos and will forward them to you along with a copy of this message to yours orders email. I haven’t tested it yet but I don’t believe it is going to hold a vacuum with threads cut that badly.


Originally Posted by Boston Pump Customer Service
Hi:
We have reviewed your pictures and we writing you this to notify you
That your cylinder is perfect and there is nothing wrong with the
Tapping. The notches that you are seeing are made to prevent the
Coupling getting air locked to the to its threat. This technique used
Whenever a pressure is involved. The best example is a plastic coca cola
Bottle. Look closer next time you drinking a carbonated drink from a
Plastic bottle!
The red stuff that you see are called “dry lubrication” that are there
To again prevent stocking and help you with a smoother open and closing
Of the valve. The lube will eventually come off and disappear. It seems
That you are using our product for the first time so make-sure to read
All literature printed and online to understand the use of these
Products.
You can also see our videos online to be become more acquainted.
The link is posted here. *Removed link*
Sincerely
Customer Care Center

Originally Posted by Me
Well before emailing you I posted these pictures and on 2 separate major online forums where people use pumps and recommend companies & techniques. There are multiple people who are all saying these threads look improperly cut, as they do to me.
If you’re saying everyone is wrong can you please send me pictures of other Boston Pump cylinders that have these notches? And thanks.

Originally Posted by Boston Pump Customer Service
HI:
We have been in this business for more than 35 years and we do not need
Nor relay on any nonsense biased, mickey mouse forum(s) to validated or
Point or proof the quality of our products. You either trust a company
Or you don’t! On either case you have no claim since your product is
Perfectly made and there is absolutely nothing wrong with your cylinder.
Such we have also provide you concrete answer to your concern. There is
Nothing else we can do for you at this time since you have a perfect
Cylinder.
Sincerely
Customer Care Center

All I can say is that I have 5 cylinders from 3 different vendors (none Boston Pump) and all have continuous smooth tapped threads. So in my experience, I have never seen anything like your cylinder. To me, if you want a cylinder to hold vacuum, everything has to fit and seal perfectly. I even put teflon tape on all of my connector threads in addition to the O-ring seal.

However, on second look, it does look as though those tracks were purposely cut, so that means that Boston Pump relies on the O-ring to seal the connector to the cylinder.

So the big question is, do you have sealing problems with your cylinder?

The primary goal of PE should be to make your penis as healthy as possible in both form and function. If you do that, increased size will follow.

Last edited by gprent : 07-24-2017 at .

That’s clearly biased & mickey mouse advice gprent. ;)
Probably just going to ship it back with tracking proof and ask politely for a refund or replacement before looking into a charge back.

Originally Posted by gprent
All I can say is that I have 5 cylinders from 3 different vendors (none Boston Pump) and all have continuous smooth tapped threads. So in my experience, I have never seen anything like your cylinder. To me, if you want a cylinder to hold vacuum, everything has to fit and seal perfectly. I even put teflon tape on all of my connector threads in addition to the O-ring seal.

However, on second look, it does look as though those tracks were purposely cut, so that means that Boston Pump relies on the O-ring to seal the connector to the cylinder.

So the big question is, do you have sealing problems with your cylinder?

It’s confusing because they do almost look purposefully cut which is why I just asked them for a couple of pictures first.
Still waiting on the male couplers to test it out and they should be in today or tomorrow. Have a straight, a right angle and another female and it was only around $12 shipped, versus $12 for 1 straight from BP.
I don’t really have a huge issue putting some pipe thread tape or RTV around it.. But now it’s the principle of it. Kind of want to know because it wasn’t a cheap purchase.

If anyone else has a BP cylinder would be good to hear from them.

Last edited by user2017 : 07-24-2017 at .

The teflon tape will not work because of the grooves, so no point in that and don’t use any RTV. Just screw the female connector back in with the O-ring and make it is snug but don’t over tighten. According to BP, it should work perfectly fine just like that and if so, keep the cylinder and have fun pumping.

The primary goal of PE should be to make your penis as healthy as possible in both form and function. If you do that, increased size will follow.

Couplers came in and it all works just fine. Still could have done without the snark from “customer service”.

Yeah, poor customer service. I wouldn’t do business with them solely based on that response. You can stand behind your product and explain methods of production without getting an attitude. I know everyone has bad days. Hopefully that’s not par for the course with them.

Those notches did look purposeful though and I’ve seen something similar before, just not on a cylinder for pumping. Admiteddly I’ve only got two cylinders from the same company and never unscrewed the female adapter!

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