Barrow Dabel 28b Slim 120 mm
Let’s start alphabetically with the letter B, i.e. Barrow and the Dabel 28b 120mm. First of all, a brief gallery and pictures of the radiator before cutting it open:
Let’s let the manufacturer have his say before I comment on this:
Pre-chamber, inlet and plumb bob
Let’s be surprised and open the radiator at the pre-chamber (tank). The solder joints of the cooling channels are somewhat oxidized and also scaled. The solder is all around and well distributed. The bottom line is that you can leave it as it is for now.
The solder at this point is without criticism, because I find pure tin under the exposed surface, i.e. no lead.
The walls of the antechamber are also without complaint, because CuZn40 is still proper brass. So up to this point, everything is still in the deep green range.
But now we come to a certain point where the wheat is separated from the chaff, namely at the threaded inserts for the fittings, which were soldered into the chamber beforehand, often by a supplier. With more than 70% lead in the solder, this product must definitely not be sold in the EU, as it is a blatant violation of import regulations and RoHS requirements! We are not talking about microscopically small quantities here either, but during soldering the entire cavity around the insert is filled with solder, in this case lead. This adds up to quite a lot that you can’t easily see unless you really cut the tank open properly.
The soldered threaded insert is made of white brass with almost 50% zinc by weight. This is almost on the borderline of brittle (from around 50% Zn).
Cooling channels and cooling fins
Now we come to the cooling channels and the fins soldered to them. If you cut the whole thing open, you get the usual picture:
The cooling channels are made of normal yellow brass (CuZn37). This is ok and is perfectly acceptable.
The cooling fins are made of pure copper because brass would break more easily here, as it would also be much more brittle due to the zinc.
Frame and screws
With the usual addition of chrome, the frame with the threaded holes for mounting is very durable.
The screws, on the other hand, are only made of non-alloy steel and are therefore much softer. As Barrow does not use any protection for the channels, longer screws would be critical as they could damage the cooling channels.
Summary and interim conclusion
And yes, it really is what it says on the tin. Even more than that, and that’s the real problem. The radiator contains quite a lot of lead, and far too much. This means that sales in the EU should be stopped immediately. Unfortunately, Caseking as the importer has not yet reacted, the contact including the warning was made on Wednesday last week, the measurement result followed shortly afterwards. Neither Caseking nor Barrow have given any feedback here and I should not be surprised if one of the market participants, whether manufacturer, supplier or retailer, contacts the Federal Environment Agency (UBA) about this. This radiator should be closely examined in all sizes and taken off the market in this form. This is not my job, but I must definitely issue a warning at this point. This must be checked and action must be taken immediately.
| Assembly | Manufacturer’s specification | Material test |
| Pre-chamber / Terminal | Brass | Brass CuZn40 (60% Cu, 40% Zn) |
| Threaded inserts G1/4 | Brass | Brass (51% Cu, 49% Zn) |
| Channels/tubes | Brass | Brass CuZn37 (63% Cu, 37% Zn) |
| Solder used | n.a. | Channels: Tin (100% Sn) Thread inserts: Lead (70% Pb, 30% Sn) |
| Cooling fins | Copper | Copper (100% Cu) |
| Frame / side panel | Steel | Chrome steel (82% Fe, 18% Cr) |
| Screws | – | Galvanized steel (100% Fe) |
| Other accessories | – | – |
| RoHS labeled on box | RoHS violation! | |
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