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Izzo Duetto steam wand valve repair

Postby Bob_McBob on Mon Mar 21, 2011 4:29 am

My Duetto has a long-standing issue with the steam wand valve leaking. I've disassembled and cleaned it multiple times with no improvement. I also tried reversing the teflon insert in the stem since it had been deformed from months of tightening the knob, but it only made a small difference and eventually got just as bad.

I contacted Chris' Coffee and was told they do not carry any individual replacement parts for the Duetto's steam wand and hot water tap valves. The entire valve assembly costs $46 plus shipping, which is a little crazy for a part which seems likely to fail again in the not-too-distant future.

I gather my only option here is finding a supplier for teflon rod of the appropriate diameter and hoping it will fix my problem. Is there anything else I can try? I need to order some parts from CC and I'm considering just biting the bullet on the whole valve since I don't want to end up paying shipping twice.

Image
Tool marks on the nut are factory original.

Image
Deformed teflon insert.
Chris
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Postby Jeepin' Geo on Tue Mar 22, 2011 11:32 pm

Hi Chris,

You're welcome to the any of the extra valve parts I have since switching over to the Quick Mill joystick valves. They were still leak free when I did the swap.

Let me know if you need anything.

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Postby HB on Wed Mar 23, 2011 7:27 am

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Postby Bob_McBob on Wed Mar 23, 2011 7:38 am

I've read that thread many times when searching for a solution over the past six months. The proportions of the Espresso Care stem don't appear to be the same as the one the Duetto uses (shown in the photo I posted), so I'm not sure if it's even physically compatible. It's also not chromed.
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Postby benm5678 on Wed Mar 23, 2011 9:44 am

I wonder if those PTFE rods they mentioned will work... I'd also be interested to try a fresh one to see if it seals better... i don't have a leak, but sometimes hard to get it to stop the little spritz of steam/water.

I couldn't find yet available anywhere online, one below is out of stock:
http://onecall.farnell.com/polypenco/40...dp/7174433
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Postby Jeepin' Geo on Wed Mar 23, 2011 11:50 am

benm5678 wrote:I wonder if those PTFE rods they mentioned will work... I'd also be interested to try a fresh one to see if it seals better... i don't have a leak, but sometimes hard to get it to stop the little spritz of steam/water.

I couldn't find yet available anywhere online, one below is out of stock:
http://onecall.farnell.com/polypenco/40...dp/7174433


McMaster has a decent selection of PTFE rods, fairly inexpensive. If you can determine the diameter needed and have a way to make a clean cut, this could be an option.

http://www.mcmaster.com and search for teflon rods

George
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Postby cannonfodder on Wed Mar 23, 2011 11:57 am

I made a replacement for my Isomac years ago. I used sheet stock or another gasket that was large enough to cut a plug from. Don't remember which one it was. You have to use a pick to dig out the old gasket. The cup the gasket sits in is tapered in the front to hold the gasket in the pocket. You will have to cut a thin taper on the back of the replacement plug then put a dab of food safe lube on it, then apply lots of pressure to get it to slip into the pocket.
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Postby benm5678 on Wed Mar 23, 2011 2:27 pm

Thanks for tips guys!! :)

I reversed mine just now and works awesome... a light touch shuts off all steam. I did destroy one side of it while prying out, but that's the bottom side of the plug now...

Very cool, I'll try using less force on it now, maybe it'll help keep it longer. I also had my steam pressure up close to 1.5 at one point in the machine's life, and I wondered if that helped contribute to it. Since then I went back to the pressure it came with (~1.25bar).
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