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SpeedStar
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Posted Wed Mar 18, 2009, 2:24pm
Subject: WT borrow portafilter pressure gauge for Silvia
 

I was hoping I could find a fellow member willing to let me borrow their portafilter pressure gauge so I can check and adjust my OPV on my Silvia.  I assume this is a one time thing and didn't want to guess on it or spend the $60 to buy one for one time use.

I can send a box with a prepaid label to cover shipping to me and return back quickly.  I can pay a few bucks too if needed.  Can anyone help me out?
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PJK
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Posted Wed Mar 18, 2009, 11:25pm
Subject: Re: WT borrow portafilter pressure gauge for Silvia
 

I have gathered the parts to assemble one however I am only home on weekends.  The plan is to put it together and check my machine this comming weekend.  No promises however.  If I find out my machine's pressure I can loan it for a while. When I get to tweeking the OPV I'll need it back again.

Phil

 
Philip J. Keleshian
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wenus2
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Posted Thu Mar 19, 2009, 12:43am
Subject: Re: WT borrow portafilter pressure gauge for Silvia
 

for ~$17 shipped you can own your own, cost about the same as borrowing one.

3/8" to 1/4" adapter
1/4" brass tee
1/4" needle valve (thanks Fifthgen,  brilliant!)
200 PSI gauge, 1/4"
Teflon tape

*links removed

If you don't mind spending a bit more, you'd be better off with a glycerine filled gauge (160 or 200 PSI), they can be had for about $15ish if you shop.

 
enjoy the journey
-jw
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SpeedStar
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SpeedStar
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Posted Thu Mar 19, 2009, 6:26am
Subject: Re: WT borrow portafilter pressure gauge for Silvia
 

Phil - thanks for the offer.  I look forward to hearing how it works out for you.  Are you going to use the needle valve to allow flow or just static pressure without the valve?  I will wait to see how it goes.
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SpeedStar
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SpeedStar
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Posted Thu Mar 19, 2009, 6:28am
Subject: Re: WT borrow portafilter pressure gauge for Silvia
 

wenus2 Said:

for ~$17 shipped you can own your own, cost about the same as borrowing one.

3/8" to 1/4" adapter
1/4" brass tee
1/4" needle valve (thanks Fifthgen,  brilliant!)
200 PSI gauge, 1/4"
Teflon tape


If you don't mind spending a bit more, you'd be better off with a glycerine filled gauge (160 or 200 PSI), they can be had for about $15ish if you shop.

Posted March 19, 2009 link

Thanks for the list.  I did go by my local Lowes and it seemed that I could piece something together but thought I would check here first.  I also couldn't get the spout off of my OEM Rancilio portafilter.  I assume they do come off right?
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grumpybarista
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Posted Thu Mar 19, 2009, 7:03am
Subject: Re: WT borrow portafilter pressure gauge for Silvia
 

You betcha. But looking at the thread, and I'm no expert, I'd guess it's more like a 1/2" adapter not a 3/8" you'd need. Perhaps best thing is to take the PF with you if you go shopping. That's what I'm going to do. Thanks for the idea.

Phil

grumpybarista: P3190005.jpg
(Click for larger image)

 
Phil

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JonR10
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Posted Thu Mar 19, 2009, 7:21am
Subject: Re: WT borrow portafilter pressure gauge for Silvia
 

grumpybarista Said:

...and I'm no expert, I'd guess it's more like a 1/2" adapter not a 3/8" you'd need. Perhaps best thing is to take the PF with you if you go shopping. That's what I'm going to do.

Posted March 19, 2009 link

It might be more convenient to carry the spout and match the thread.  Either will do fine....
And I do believe it's 3/8" pipe thread.

As a note: I think that pipe size is measured on internal diameter (ID), screws are measured on outside diameter (OD)

 
Jon Rosenthal
Houston, TX
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SpeedStar
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SpeedStar
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Posted Thu Mar 19, 2009, 7:25am
Subject: Re: WT borrow portafilter pressure gauge for Silvia
 

I was told by a guy from EPNW that the Silvia PF threads are 3/8 BSP not our normal 3/8 NPT that we would find in our local hardeware stores.   It appears that we can find connections that will work though from the photos af successful setups already done.  

Can anyone chime in on what thread we should look for at our US hardware stores, NPT, flare, compression etc...?
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CraigA
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Posted Thu Mar 19, 2009, 7:53am
Subject: Re: WT borrow portafilter pressure gauge for Silvia
 

grumpybarista Said:

You betcha. But looking at the thread, and I'm no expert, I'd guess it's more like a 1/2" adapter not a 3/8" you'd need.

Posted March 19, 2009 link

I built a PF grouphead pressure measuring setup for my Silvia & I used a 3/8" NPT pipe brass fitting.
Addendum: Ok, not exactly the same setup for the reasons I stated in the post., but I do remember trying out & attaching the 3/8" fitting to the bottom of the PF nipple of the old original PF handle for my Silvia (May 2001). It's not a perfect fit, but if you use a bit of teflon tape it'll work perfectly with no leaks. "Gaggia pressure problem and subsequent fix"

Perhaps best thing is to take the PF with you if you go shopping. That's what I'm going to do. Thanks for the idea.

Yes, it certainly wouldn't hurt., but the spout nipple is a standard size.. {;-)

 
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JonR10
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Posted Thu Mar 19, 2009, 9:41am
Subject: Re: WT borrow portafilter pressure gauge for Silvia
 

SpeedStar Said:

I was told by a guy from EPNW that the Silvia PF threads are 3/8 BSP not our normal 3/8 NPT that we would find in our local hardeware stores.  

Posted March 19, 2009 link

I am under the impression that in most applications BSP and NP (straight National Pipe thread) are interchangeable in sizes up to 1/2 inch.  I can not state this with authority, but I can say that I was able to make my PF gauge setup with material I found at my local WalMart with a couple of standard pipe fittings and a gauge and some teflon tape. I did not use BSP fittings.

 
Jon Rosenthal
Houston, TX
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