Breville Dual Boiler Rebuild - Page 2

November 9th, 2020, 3:02 pm

dinsdale wrote:I had the same problem with a stuck pipe in the steam boiler. After anti-scale, anti-rust and heat didn't help I pulled the teflon pipe out (which means the flared fitting is probably in the boiler) and then used an easy-out to remove the brass fitting.
I also had a problem with a leaky drain valve. The smaller O ring was damaged.

Great response! Thank you! I was wondering about just yanking until the tubing let go. Is the flare/tube connector setup here on the BDB something standard or off the shelf? I have been wondering about replacing lines at some point.

Also, thanks for the shot of the drain valves! I didn't even think of checking for that smaller o-ring on screw side. Did you replace with silicone, aflas, viton, other?

November 9th, 2020, 4:38 pm

The tubing appears to be standard teflon tubing - 4mm outer diameter, 2.5mm inner diameter. I haven't yet found a source for the flared metal end fittings although I only started looking today. As Breville refuse to sell spare parts in the UK I have to order spares from Australia so I try and find equivalent parts first.

I have been using Viton O rings for all replacements with no problems so far - I live in London which has hard water so I have replaced nearly all of the smaller O rings.

November 9th, 2020, 7:14 pm

Thanks for info!

#14: Post by **mgwolf** » November 9th, 2020, 11:02 pm

Brian, interesting project. Hope you didn't pay more than a few bucks for this beautiful machine.

November 10th, 2020, 9:38 am

I did pay slightly more than I wanted. I knew the steam boiler was offline and the wand was dripping. Figured it was a descale gone wrong with a leaky wand... all common things. I wasn't prepared for the atrocities inside the machine.

That said, if I can get it back up and running should be able to get at least double what I paid. Probably a little more. Worse case, I part it out and re-coup some $$$.

#16: Post by **DaveB** » November 10th, 2020, 10:43 am

grufromtheloo wrote:I wasn't prepared for the atrocities inside the machine. That said, if I can get it back up and running should be able to get at least double what I paid. Probably a little more. Worse case, I part it out and re-coup some $$$.

I have to give you props for your dedication and resourcefulness. I'm enjoying your updates. This thread serves as a reminder to pop the cover to inspect any used machine prior to purchase - including shiny chrome boxes. This would have been a hard pass at any price. And if anyone refused to let me have a look inside I wouldn't walk away. I would run!

Cheers and good luck!

#17: Post by **lancealot** » November 10th, 2020, 10:48 am

Brian, I wanted to drop in and give you kudos for this undertaking and for being so kind as to document the process for us. I really appreciate your work.

November 10th, 2020, 11:07 am

Thanks it's appreciated! There are some procedures for the BDB that are _really_ well documented on these forums. Others not so much. For instance I had never seen someone layout how to remove the steam boiler. My hope is that by performing a near complete rebuild 1) We as a community can gain some knowledge 2) we make the BDB a little more approachable for folks concerned about "Breville Specific Parts" and "consumer quality" and 3) we can foster others to contribute documentation on the forums.

#19: Post by **Florin911** » November 11th, 2020, 9:09 pm

Great Job !
That's a lot of work.
Thanks for all your job progress updates !

November 15th, 2020, 7:16 pm

Update. Finished painting the boiler housing and steam valve mount. Next; rebuild once I find some parts (screws, hose clamps, heat resistant wire, some form of metal band for the steam boiler fuse). For the paint job used rustoleum high heat and 1/4" stickers to preserve grounding through the screw/mount holes.