Powell Brewing - Thermopot mash tun - Mini review

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kev

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This is intended as a mini-review and unboxing. First impressions if you like. I won't be using it until the weekend at least so I can't comment on brew day specifics. I'll update this it after I use it.

Wee bit of background......I had 2 thermopot mash tuns. Both 80 litre and both from Germany. I had one and then decided big batches weren't for me so I flogged it. Then I changed my mind....bought another....then changed my mind again! Anyway, both times I bought them for about £80 or whatever and I got my false bottom from The Malt Miller.

Then Bergland decided to bend the EU laws a wee bit and decided to stop selling to people in certain countries and pointed you to their "distributors" who were changing (in some cases) over £300 for the same thing. Anyway, I decided to avoid buying one for quite some time until I found Powell Brewing.

Now they seemed cheap. Over £100 cheaper than other UK "distributors" of Bergland products so I was sceptical. In addition, I was so impressed with The Malt Millers previous false bottom, the fella had a lot to live up to. Lastly, I found next to no info on the net regarding the products they offer other than the odd chap saying "they're good", etc.

So I decided to buy a 70l thermopot mash tun and matching false bottom. Total price to my door was £200 which I thought was pretty decent a my old thermopot and false bottom was about the same. I then had to convert it myself. So in my mind, if the worst comes to it I've just replaced what I had and even if the false bottom, etc is total ****, I'll be able to make do.

The main thing in my mind was that this is a side draining vessel. That's obviously how Powell save cash as it's a LOT less work and less parts. The Malt Miller welds in a new lower ring FFS! That's a lot of work and therefore they cost more.

So it arrived today April 2nd (ordered 26th Mar) which is bang on what they said. I messaged them and they said the pot was ready but the false bottom needed to be made and it would be here middle of the week. Spot on. Email when it was shipped, etc. Can't really ask for more.

It arrived in the Bergland box ironically! If I'd paid over £300 for this I'd be a bit ****** off as only last year these boxes were flying around for 1/6th of that! Nevermind....no big deal to me.



First impressions are decent. The pot has two pretty big dents in the lower ring but I'm not overly fussy. It's in better condition than the two I had previously direct from Bergland so not bothered. Plus I brew in the garage so it's not going to stay pristine for long.

The first moan is the tap. It's utter *****. It's probably the cheapest metal tap you can get. That said, as long as it functions well then I suppose it's ok.



Another slight moan is that on the inside there's no thread exposed. This probably isn't a big deal but I'd rather have a wee bit thread so I could have (potentially) put a 90 degree elbow on it to act as a scavenger therefore minimising dead loss even more. I could never find any internal pics of the thermopot prior to buying so I literally only just found this out.



I would have rather paid £20 more for a proper long nipple through the pot and a good 3-piece ball valve. Fortunately I have a 4 inch brass nipple and a good 3 piece valve sat here as spares so I'll fire a brew through the tun and see if I need it.

The other wee moan is the dead loss. On another thread on here I read that the company stated a 750ml dead loss in this boiler. I can tell you right now that it's more than that. However, as I said at the top, I haven't used the tun so can't accurately comment on specifics but in my years of brewing (and remember I've had 2 of these before that bottom drained) I'll be AMAZED if this has a 750ml dead loss.

Plan is to flush it through with water/oxy tomorrow night and I'll see what the volume is. I'll bung in 50 litres or whatever and drain it fully then dump the retained liquid out and measure it. Will update the thread tomorrow.

Moving onto the false bottom.......

I previously had a Malt Miller false bottom which was a work of art. Anyone's that's never seen one would be amazed. The only slight issue was they were pretty pricey. Can't remember what I paid for it but I remember it being on par with the un-converted thermopot. Basically the pots price again.....that said it was a good false bottom and would last a lifetime. The main issue I had when using it was that it sometimes left wee scratches in the tun when being removed/inserted. That was simply down to the superb fit but would **** me off over time. In other words, the Powell false bottom had a lot to live up to!

First things first, my old one was 1.5mm thick stainless and powell use 1mm thick. Yes there's a noticeable difference but the Powell one isn't flimsy at all. Happy with that slight change. In addition the Powell bottom is a ring supported on bolts and the Malt Miller one was a disc supported by an outer ring. Both are good and the Malt Miller bottom is something that looked professional and something I could never replicate.....the Powell one looks like something I could knock up in a few hours. That said it's very well done and all the screws are in nicely, etc so it's probably a better job than I could have done.....but I could have made it. For example, it's regular beer line round the outside to create a seal. I think it would have been nice to get coloured beer line or something to make it look a bit different. I know it's a small point and it's on a part you'd never see but when you open the box the first thing I think is given a morning in the garage I could have made that. If there was a point of difference, however small, it would have looked a wee bit better. Not going to knock any marks off though as it fits perfectly and will do the job perfectly.

It also has a nice big handle on top to aid removal which I don't remember seeing on any imagery I found online. The same as the Malt Miller version....it's a very tight fit. So tight in fact that I'm scared to shove it in dry and think wetting the beer line might be a good idea when I put it back in. However, it won't scratch the surface so I'm cool.





So in summary, and without having brewed through it, I'm chuffed. Got back a thermopot and false bottom for pretty much what I paid previously. Yes it's not as nice a false bottom as The Malt Miller and it's not bottom draining......but I can live with the false bottom and in some ways I think it's better. Not as nice to look at obviously, but I can see this version being easier to use long term.

The bottom draining thing isn't an issue....unless dead space is HUGE! Both my previous termopots were bottom draining and they both had issues. The only good long term way to do it is weld a ring in and go right through the centre like the Malt Miller does. I simply don't have the skill to do this and as a result he can charge a premium for it...which is totally fair in my book. It's a specialist job. If bottom draining is your thing then I'd say save up and go with the malt miller. However as I fly sparge, if there's 2 litres of dead space it doesn't matter. I just sparge longer.

Would I recommend it? Based on first impressions I'd say you'd be daft not too buy from Powell.

Reason is simple, these pots aren't going to be around long.....or maybe they will??? Depends what the folks at Bergland decide. Can't get cheaper than Powell for them though at the moment and his work is up there with the best of them.

Hope this helps some people thinking of buying from Powell but find the lack of info a bit daunting.

K
 
I've got the same pot, pleased with it too. Valve is fine
FYI, the inside face of the drain fitting has a 15mm bore, so if you get a short bit of pipe with a 15mm elbow soldered on, it slots in there neatly enough to stay put and you can get right down to the pot base to draw off
I just tip mine slightly towards the drain and find approx 500 ml of dead volume, which is full of trub anyway so no big loss

I've calibrated mine to use a stainless rule for gauging contents, measured from the top face. Accurate, and avoids boring holes for a gauge glass. I'll add the dimension here later so you can use the depth to volume and should be identical

Ian's a good guy and very helpful IME
 
That's helpful advice. Thank you. Like I said I've literally just got it and shoved it in the garage so haven't had a chance to muck around with it. Assuming the valve works fine I'll just keep it on there. It's a valve at the end of the day but I'd like a nicer one....or even better, a choice of valves.

Do you have a thermo and use it as a boiler? Sorry for the confusion but you mention trub??

K
 
Back after the outage...............it's 6.4mm per litre for the 70 litre pot, so I set up a little spreadsheet in my brewday sheet and just take a measure of headspace with the rule, drop that into a cell and it calculates the volume for me. Tested it a few times and it's spot on:D
 
No bother. Thanks for that.

Can you test my calcs please..........assuming a 100mm drop from lip to water....that gives you 54.375 litres in the tun?

K
 
Kev
We're not far apart, I have mine as 443mm high from bottom to top of lip
I just put a formula in the cell to the effect of (443 - headspace in mm) X 6.4
Doing that comes out at 53.6 litres, but probably some variation in top lip height? Your arithmetic is correct!
 
Yeh you're right. I was taking the wrong depth measurement.

K
 
Is 443mm the bottom to the lip?

Not at the actual pot just now.

K
 
Yep, I put a good straight edge across the top and then put a metre rule in the pot, and got a line on where they met
Also got a fine stiff wire and trimmed the end until it just snugged in the bore of the pot, then measured that.....going on memory I think it was 446mm inner diameter, the nominal diam on the box says 45cm?
The pot was nice and parallel, so the only bit of error is in the first few mm where the transition between side wall and base is a slight curve rather than a clean sharp corner, but that's next to nowt

I BIAB with mine and so mash in it. Sat on a polystyrene slab with a tank jacket wrapped round it and on top, I lose less than 1 degree C in 90 mins, works well
 
Great info. Ta.

Keen to get a brew through it this weekend and bang out 40 litres just to get my numbers dialled into beersmith for it. Thinking a simple summer apa or similar.

Got 2 batches to bottle first though. Boo.

K
 
Thanks god for that... i'm picking one up tomorrow (the 38.5l version)

I use one of his boilers and think it's fine... He's a decent bloke... although when I was picking the boiler up, he was working on something when I turned up and had a big mallett in his hand. I'm not sure he realised what he was doing, but he was holding it in his right hand and repeatedly striking his left palm while we were talking...

Being just the two of us, in the middle of nowhere in Wales, this could be seen as menacing haha. Fortunately I came away unscathed and with bargain!
 
Running oxy clean through it, the false bottom and a totton pump just now.

Works a treat. Just need to get some bottling done to free up one of my ferment fridges so I can get a batch through it.

K
 
Well.......as expected. The dead space is NOWHERE near where claimed.

Bit of background......I was running oxy clean through it for about half an hour. Out the tap, down to a pump and put back on top. I then stopped the pump and moved the hose to the drain and started it again. Pumped into the drain until the pump ran dry and then unhooked the pump and let the tap run dry. I then checked that that the tun was level in both axis.....it was.

I was left with 4.5 litres in the tun

No big deal to me as I know it's 4.5 litres......but it's certainly not less than a litre as claimed. Yes I could have tipped the tun, etc, etc but I want to know what the worst case is.

Here's a pic of it run dry.

K

 
Oh ****... that's what I didn't want to hear... will this result in loss of efficiency or anything like that? How do you factor this in to the initial water calcs... i.e. if you want 2.5l per kg, do you have to stick an extra 4.5L on top of the initial mash water to compensate, and does this bring about any problems?
 
Well any loss in a system will affect brewhouse efficiency but I doubt very much it'll have an effect on mash efficiency....which I assume is what you are concerned about.

As far as water calcs go......I need to brew and see what happens. At the moment though I've set up my Beersmith equipment profile with a 4.5L dead loss in the mash tun and asked it to add that into my mash liquor volume. Therefore at my desired 2.6L/kg ratio and on a basic 10kg grain bill (40L batch) it's giving me 30.5 litres of liquor. That's the (2.6X10) + 4.5.

That should in theory let me drain the tun fully and not have to change my sparge volume in order to get my desired boil volume. However, if it's an extremely wet/loose mash then I'll simply un-tick the box that tells Beersmith to add this to my mash volume which will then bung it onto my sparge volume.

One of them will be right, but I'll only know when I bung a brew through it. That's why I got ****** off at big mash tuns before as I didn't know anything about dialling in a system to get the desired results. Should only take me 2 brews (and taking a load of notes!) to nail it.

K
 
I picked up my mt today. With tubing creating a syphon but no grain or tilting, there was 2.5L of space left in tun. Reasonably happy with that. I think the fb looks tidy, and Ian was great again. Helped me out with a couple of things.
 

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