Epoch D1 RTA by EHPro

EHPro brings you the Epoch D1 RTA (Rebuildable Tank Atomizer). The Epoch features a a T-style centre post with two negative posts that allows for dual coil builds. The tank is a top fill design for simple juice filling and is 22mm in diameter. As you may have already guessed this is what we’ll be reviewing today.EHPRO Epoch D1 RTA Review

The Epoch D1 RTA Features

  • 2.5ml capacity glass tank.
  • 22mm diameter.
  • Juice flow control to help cope with high VG juice.
  • Dual offset air holes with air flow control ring.
  • T-style centre post with two negative posts for dual-coil builds.
  • Adjustable copper 510 pin.
  • Deck is removable and can be worked on without draining the main tank.

The Epoch D1 box includes

  • 1x Epoch D1 RTA.
  • 1x Delrin 510 drip tip adapter cap.
  • 1x Derlin Chuff Cap.
  • Spare O-rings.
  • Spare Screws.
  • 1x Screwdriver on a key chain.
  • Includes 2x pre made coils.
  • User Manual.
  • 1 bag of Japanese cotton.

The box is very nicely presented and the user manual is quite detailed but the text itself is quite small at least for my eyes, age is not kind. Everything is held securely in a foam tray. The spares are actually very good and the included Japanese cotton is a useful bonus.

The Epoch D1 Is Quite A Nice Looking Tank But Has It’s Faults

Aesthetically the Epoch D1 is quite pleasing. In many ways it reminds me of a SQuape RTA especially with the juice windows framed by stainless steel. The construction itself is very solid but it does have quite a lot of components, probably too many. Everything fits together well but there are issues.

What I have found is that when it comes to unscrewing a single part of the tank it has this knock on tendency to unscrew something else that you never intended to come loose at all. I find that very frustrating.Epoch D1 Parts

The airflow control ring is very smooth and actually gripping it to adjust is problematic since turning it ends up loosening some other component.

The O-ring at the base of the tank glass does not appear very thick and in many ways looks rather flimsy.

The deck can actually be removed independently of the main tank and this is actually a rather nice feature allowing a user to tweak their coil build without having to empty all their juice. The problem though is that the 510 pin is also adjustable and removing the deck tends to loosen the pin and you end up having to screw that tight again.

What really should have been some really worthwhile features just become nothing more than a annoyance that I suspect the average user will be very irritated by.

Filling the tank is actually another exercise in frustration. The delrin drip tip which also serves as a juice flow controller is a very tight fit so requires force to press on or remove.

While this is removed you can fill up the tank but placing the tip back on with the amount of force needed just causes a massive amount of pressure to be exerted which ends up pushing a large amount of your newly filled e-liquid straight out of the air holes.

It doesn’t matter whether you have those holes open or closed because the juice will find it’s way out. Add in the fact that the delrin drip tip/top cap only goes on one way due to a grooved insert that you have to align first makes this tank feel unnecessarily complicated.

It doesn’t matter whether you use the wide bore delrin drip tip/top cap or the delrin 510 drip tip adapter/top cap the filling and leaking issue happens regardless.RBA-Deck-Epoch-D1

I find it very odd that no one at EHPro noticed this when they were testing the design since it does appear to be rather flawed. What’s more is that quite a few vendors tout the Epoch D1 as almost leak proof, which is rather amusing. In actual fact during the time I carried out this Epoch D1 review it did leak at least five times.

It leaked when filling, it leaked when I adjusted the air flow, it leaked when I wanted to remove the deck. I suspect it would even leak if I looked at it wrong but perhaps that comment is a result of having to put up with its annoying ways.

In terms of actually building on the deck that part at least is relatively trouble free. The screws are reasonable and the post holes are wide enough for typical builds. One nice addition is the deck features four small holes that are designed to hold the tails of your cotton wicking, it is however a little tricky to get them to go into those holes, but of course it is, because this is the Epoch D1.

At this point though nothing really surprised me and I had become wise to this RTA and its fussy ways.RDA Deck of the Epoch d1

I will say that you really don’t want to be making anything over 2mm diameter coils and you want to be quite sparing with the wicking. I initially used what I consider to be a typical amount of wicking for a RTA and during my first few vapes with the Epoch D1 I noticed this nasty burnt taste, upon investigation the wicking had burnt in half, so definitely when it comes to cotton in this one, less is definitely the way to go.

So The Epoch D1 Is Quite The Troublesome Diva But How Does It Vape?

Well that’s the truly tragic part of all this. When you get the build right and the tank filled up after you have just mopped up its latest leak, it really is a lovely vape. Flavour is rather good I would say on par with a Lemo 2 or perhaps a little better. Vapour production is also excellent and I found I was really enjoying the vaping experience it offered.

I used Grant’s Vanilla Custard and it really was delicious but after losing at least 4-5ml of it due to constant leak issues I quickly stopped and swapped to my DIY juice, I had no further desire to use premium quality juice in it.

Every time it came to refilling the tank again I had to suffer the pain of the tank trying to come apart again or leak on me for the umpteenth time.Epoch D1 with the SMOK M80

Another issue that I haven’t mentioned until this point is that when you fill the tank to capacity and you press fit the top, the actual juice level drops below half, clearly forced down by the pressure of the top cap. This makes it very difficult to gauge how much juice you have remaining and it reminds me of a similar issue with the old Kangertech Aerotank Mega.

Given the fact that this tank only actually holds 2.5ml of juice it’s not that attractive an option when many are 3-6ml these days.

One interesting feature the tank does have is that the drip tip/top cap serves as a juice flow controller and turning it 90 degrees can open up or restrict the juice flow. It is designed to be helpful when running high VG juices but considering how much it leaks with 50/50 juice it seems like a pointless function. Please EHPro get the basics right before you throw in another feature.

If all of these issues were fixed or even if the tank was more straightforward in its design then it would be a real contender on the market but as it stands it just seems to be more trouble than it’s worth.

I have come down rather hard on this tank but I feel I am justified since it fails in its definition of being a tank i.e. something that is designed to hold juice not expel it at a moments notice.

Is The Epoch D1 Worth it?

I am afraid to say that in my opinion it is certainly not worth it. I find it suffers the problem of being rather over engineered when a far simpler and convenient design would have been more welcome. The features this RTA has are all very good ideas but the execution of them seems distinctly lacking.

The vape quality in terms of flavour and cloud production are good and it’s a real shame that they play second fiddle to a leaky and not very secure tank that seems heavily over burdened with one too many functions.

Final Review Verdict

A RTA that had real potential due to the very good vape experience it offers but due to getting everything else fundamentally wrong or making simple tasks extremely troublesome it fails.

If EHPro were to revise things then this tank design definitely has a bright future if they can learn from the flaws in the current version.

The Good

  • Good flavour
  • Good vapour production
  • Decent build deck that is removable

The Not So Good

  • Leaks like a sieve
  • Has a consistent tendency to unscrew itself
  • Hard to gauge tank fill level
  • Drip tip/top caps are a very hard fit and frequently end up forcing juice out of the air holes.
  • Dual Coil only. I realise many RTA’s are dual coil these days but not adding a single coil option limits flexibility for users.
  • 2.5ml is rather low capacity
  • Feels over engineered with too many components and features that don’t work that well in practice. A simpler design would have served this manufacturer better.
Build Quality
Chances of Buying a Replacement if Lost
I have been vaping for four years now. I was a 20 a day smoker and a friend of mine encouraged me to give vaping a try. He gifted me with a ego/ce4 set up and some juice and to be fair I found it reasonable but not ideal so I was still also smoking. I went to my local B&M and got some good advice regarding what vaping gear would suit me, as well as finding some juice more to my liking. For a couple of months I used a Vamo V5 but I kept seeing these shiny tube mods and I wondered what they were. After some investigation I discovered they were called mechanical mods and I had to buy my own. From that point I was completely off the cigarettes and quite satisfied with my set up. I eventually moved on the rebuildable devices with my first RDA and RTA. I love vaping and I have no plans to ever stop because there are so many new flavours to discover and a vast amount of different devices with newer technologies to try. While I still own a couple of mechanical mods my preference these days is VW box mods and I really do enjoy a vape with temperature control. I also make my own e-juice as time allows.


  1. How to avoid juice leaking, or how to fill the tank correctly:
    1. Close the juice flow controller. Totally.
    2. Open the cap.
    3. Fill the liquid in.
    4. Close the cap.
    5. Turn the whole Epoch D1 on the top of its head (so the liquid run down, so if you open the juice controller, the pressure cannot push the liquid out of the air holes)
    6. Open the juice flow controller (you can hear a small sound effect, how the pressured air comes out, instead of juice)
    7. Vape 🙂

    This is the secret. I had much bad times because the leaking, and needed weeks until I was able to solve. But this works, surely.


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