Water currently diverts to the drip tray when pressure setting is 
overwhelmed. I had a bad pump once, no water went anywhere until it slowly 
dripped through the puck.

I can check the pump but its not fun to get at. I believe pump is woking 
great. Why would pump cause pressure release early?

Eric

On Wednesday, April 11, 2018 at 8:29:10 AM UTC-7, bmacpiper wrote:

> Hey Eric,
> Any chance your pump is failing instead? Before I converted to rotary, I 
> had similar symptoms each time a vibe pump failed, if memory serves. You 
> could search (really) old threads from me when this was happening. But if I 
> recall correctly, the pump would sometimes develop pressure, sometimes not, 
> and it was maddening until I sorted it out. Similar to what you describe in 
> the OPV, the sides of the piston in the vibe pump looked totally fine, but 
> they were worn and binding up, etc. I do think the OPV should be relatively 
> smooth, but doubt it’s the issue, especially with a new one in there. Scale 
> could indeed cause any moving part to bind, but a new OPV has no scale on 
> it of course. You could also have chunks of scale that have broken off and 
> are fouling the pump intermittently. It’s pretty easy to disassemble the 
> pump to check for this.
>
> As to why it would develop highest pressure at the midpoint; just taking a 
> SWAG, but I wonder if that setting is giving just the right amount of back 
> pressure to a failing pump and letting it work most effectively?
>
> I’d try a known good pump, if possible. You may end up down the rabbit 
> hole, though, because you might see scale in the end of water tubing, and 
> get a case of the “while I’m here”s...
>
> Best and let us know,
> bmc
>
> On Apr 11, 2018, at 08:19, Eric Christoffersen <zak...@gmail.com 
> <javascript:>> wrote:
>
> Hey Guys,
>
> I got about 9 days of bliss from this new unit, now it won't maintain 
> pressure, and problem is getting worse.
>
> I managed to open up the old unit and it works exactly how I expected, the 
> screw presses the top of a strong spring which presses a hexagonal plunger 
> with a rubber pad on its end. When pressure in main line is exceeded then 
> pad lifts to release water. The metal at the end of the plunger feels 
> gritty, is not smooth. Not scaly though, looked pretty clean. The metal 
> inside is rough so makes it sticky and together with tolerances the unit is 
> a little difficult to reassemble. Could it be there's too much friction? 
> Maybe I sand it smooth?
>
> Some things to note:
>
> - No water into drip tray until pressure reaches an indicated 4 bar. The 
> thing does hold some pressure.
> - The screw control does sort of control the brew pressure, if I back it 
> way off the brew pressure doesn't exceed (indicated) 4 bar or so, if I 
> tighten it all the way down I get 6-7 bar. If I leave it 3/4 screwed in I 
> get 7-8 bar. Yes I get most brew pressure with spring not fully in. I get 
> the same brew pressures when brewing coffee and with blind portafilter.
>
> Has anyone experienced this? Doesn't seem right that two parts that look 
> fine are both 'defective' in the same way so I'm looking for another 
> explanation.
>
> I have an accurate bike tire gauge - was sort of thinking to connect it to 
> a bike pump and see if I can't read the pressure, but that'd be air not 
> water.
>
> Dave: You mention scale, have you experienced this issue? Do you know how 
> scale causes this? Its been 3-4 years since I descaled so likely there are 
> some large encrustations in the boilers. I'm just not seeing how scale is 
> causing this.
>
>
>
> On Saturday, March 24, 2018 at 4:10:26 PM UTC-7, Dave B wrote:
>
>> THAT is caused by SCALE
>>
>> On Fri, Mar 23, 2018 at 5:28 AM, herman dickens <herman...@gmail.com> 
>> wrote:
>>
>>> It sounds like you fixed it.
>>>
>>> On Fri, Mar 23, 2018 at 2:06 AM, Eric Christoffersen <zak...@gmail.com> 
>>> wrote:
>>>
>>>> Got another one form wll. While waiting the brew pressure dropped to 
>>>> indicated 4 bar, water just pouring into drip tray.
>>>>
>>>> Installed the new unit and it also brewed with lower pressure, screwed 
>>>> it down all the way and got 8 bar. Over the next 4 days brew pressure rose 
>>>> until 12+ bar. I backed the screw back and now pressure is stable at 9bar.
>>>>
>>>> Wonder if this is caused by air? I sort of remember something similar 
>>>> when I replaced before.
>>>>
>>>> Anyway, all set no.
>>>>
>>>> I'd open the old one but my harbor freight snap ring pliers were 
>>>> destroyed in the attempt.
>>>>
>>>> On Thursday, February 1, 2018 at 2:55:07 PM UTC-8, Eric Christoffersen 
>>>> wrote:
>>>>
>>>>>
>>>>> My Brewtus2 has a hole behind the drip tray to reach a flathead that 
>>>>> controls the brew pressure, along with a sticker telling me to never 
>>>>> adjust 
>>>>> it myself. I replaced that manky broken original that was controlled with 
>>>>> plastic flathead some years ago with what looks like a nicer one that has 
>>>>> a 
>>>>> metal flathead fitting.
>>>>>
>>>>> Today the new pressure control started failing, only getting an 
>>>>> indicated 5-6 bar. Bunch of water goes into the drip tray.
>>>>>
>>>>> The new pressure control looks like it could be disassembled if my 
>>>>> snapring plyers weren't broken but I'm wondering if someone can recommend 
>>>>> a 
>>>>> better part that will last longer?
>>>>>
>>>>> Or do I just order a new one?
>>>>>
>>>>> Thanks,
>>>>> Eric
>>>>>
>>>>>
>>>> -- 
>>>> You received this message because you are subscribed to the Google 
>>>> Groups "Brewtus" group.
>>>> To unsubscribe from this group and stop receiving emails from it, send 
>>>> an email to brewtus+u...@googlegroups.com.
>>>> To post to this group, send email to bre...@googlegroups.com.
>>>> Visit this group at https://groups.google.com/group/brewtus.
>>>> For more options, visit https://groups.google.com/d/optout.
>>>>
>>>
>>>
>>> -- 
>>> You received this message because you are subscribed to the Google 
>>> Groups "Brewtus" group.
>>> To unsubscribe from this group and stop receiving emails from it, send 
>>> an email to brewtus+u...@googlegroups.com.
>>> To post to this group, send email to bre...@googlegroups.com.
>>> Visit this group at https://groups.google.com/group/brewtus.
>>> For more options, visit https://groups.google.com/d/optout.
>>>
>>
>>
> -- 
> You received this message because you are subscribed to the Google Groups 
> "Brewtus" group.
> To unsubscribe from this group and stop receiving emails from it, send an 
> email to brewtus+u...@googlegroups.com <javascript:>.
> To post to this group, send email to bre...@googlegroups.com <javascript:>
> .
> Visit this group at https://groups.google.com/group/brewtus.
> For more options, visit https://groups.google.com/d/optout.
>
>
>

-- 
You received this message because you are subscribed to the Google Groups 
"Brewtus" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to brewtus+unsubscr...@googlegroups.com.
To post to this group, send email to brewtus@googlegroups.com.
Visit this group at https://groups.google.com/group/brewtus.
For more options, visit https://groups.google.com/d/optout.

Reply via email to