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by pcrussell50
April 21st, 2024, 1:20 pm
Forum: Espresso Machines
Replies: 1389
Views: 192195

Breville Dual Boiler Mods and Maintenance

Yes. In the serial number there are four consecutive numbers. They are the year and the week of the year, of manufacture. Mine is 1829, which means my machine was built in the 29th week of 2018. Compare that to the print on the boiler in your photo, which might be when the boiler was fabbed. There
by pcrussell50
April 20th, 2024, 10:40 pm
Forum: Espresso Machines
Replies: 1389
Views: 192195

Breville Dual Boiler Mods and Maintenance

This was a fruitful discussion. My mid-2018 machine has a different vacuum breaker than yours. It does not have that white gasket thing, for starters. Or a red/silicone o-ring. Further, I have a spare anti-vac valve and it also does not have that white gasket or any red o-rings. Breville has made ro...
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by pcrussell50
April 20th, 2024, 5:27 pm
Forum: Espresso Machines
Replies: 1389
Views: 192195

Breville Dual Boiler Mods and Maintenance

Interesting... where in the VB does a #007 o-ring go? In your bottom link it shows a disassembled anti-vac valve. That one has a white o-ring at the base of the plunger. Your photo has something red. If that is a silicone #007, it will wear and fail again because silicone is not specced for steam. T...
by pcrussell50
April 20th, 2024, 4:45 pm
Forum: Espresso Machines
Replies: 1389
Views: 192195

Breville Dual Boiler Mods and Maintenance

The BDB vacuum breaker (anti-vac valve) is extraordinarily high quality piece...All stainless and PTFE. It seems to stick less often than most AVVs from other machines. But it can happen. It happened to me once years and years ago before I knew what they were. In most cases a sharp (but no hard) rap...
by pcrussell50
April 20th, 2024, 1:08 pm
Forum: Espresso Machines
Replies: 1389
Views: 192195

Breville Dual Boiler Mods and Maintenance

It is possible that silicone grease might soften or expand silicone o-rings. But that should not lock them solid. Silicone grease will not stop corrosion if your water has corrosives in it, but it will tend to keep the corrosion from freezing things in place. So you've got me, here. :shrugs: For thi...
by pcrussell50
April 18th, 2024, 12:43 am
Forum: Espresso Machines
Replies: 1389
Views: 192195

Breville Dual Boiler Mods and Maintenance

Well the OPVs are no doubt assembled by hand. It seems not at all out of the realm of possibility that someone got it in crooked and ended up mangling it. It's been a while since I had my original OPV apart. Before I plumbed and switched to a rotary pump, I was using a prosumer brass OPV in my
by pcrussell50
April 17th, 2024, 12:38 pm
Forum: Espresso Machines
Replies: 1389
Views: 192195

Breville Dual Boiler Mods and Maintenance

I haven't used a vibe pump in my BDB since early 2019, so memory fades. But it sounds pretty normal to me. What happens to pressure if you let it run against the blind basket for a whole 60s? Does the pressure stabilise at a certain value? Your test video is too short to be determinative. Also, one of
by pcrussell50
April 16th, 2024, 10:33 pm
Forum: Espresso Machines
Replies: 1389
Views: 192195

Breville Dual Boiler Mods and Maintenance

Careful heating. The tube is PTFE, which is highly heat resistant. And it might not behave the way you expect, when heated. So be careful if that is the route you take. I think the way they get the ferrule in there is by a press. You might be able to put some pliers down on the brass ring, and
by pcrussell50
April 16th, 2024, 2:07 am
Forum: Espresso Machines
Replies: 1389
Views: 192195

Breville Dual Boiler Mods and Maintenance

Rotary pumps can be loud too, but a different kind of sound less irritating than a vibe pump. Mine is silent mostly because my pump is done like commercial machines... Which means it is away from the machine, and under the kitchen sink, with the softener. It's also buried by a bunch of junk my wife ...
by pcrussell50
April 15th, 2024, 10:49 pm
Forum: Espresso Machines
Replies: 1389
Views: 192195

Breville Dual Boiler Mods and Maintenance