Hi all,
My classic is not giving me very good brew pressure. I've removed the shower screen and shower screen holder so there should be almost no restriction. I've done a quick test and get 150mL/min...
Steam is fine, and I can get a good strong stream of water out of the wand too.
I've done a full strip down of the machine so far, including:
The shower screen and holder have been replaced in the last ~6 months, so they aren't the issue.
I've also got a new brew thermostat on the way (last replaced ~2 years ago).
While cleaning the OPV I fully removed the adjustment valve (via the hex nut) and tried to screw it back to the same depth it was in before... I don't have a pressure gauge to re-calibrate. However the brew pressure was poor before fiddling with this.
The only thing left I haven't touched (or broken) is the pump.
I just ordered a new ULKA EX5 in the final hope of fixing the thing! Otherwise I've spent a good $200 on replacement parts and still a broken machine
Anyone with some more experience care to give insight or opinion on the problem?
My classic is not giving me very good brew pressure. I've removed the shower screen and shower screen holder so there should be almost no restriction. I've done a quick test and get 150mL/min...
Steam is fine, and I can get a good strong stream of water out of the wand too.
I've done a full strip down of the machine so far, including:
- brand new boiler, the old one was severely scaled and missing a lot of aluminium inside

- Descaled, scrubbed and flushed group head
- Pulled apart 3-way solenoid valve and descaled, flushed thoroughly
- Pulled apart OPV, descaled and flushed thoroughly
The shower screen and holder have been replaced in the last ~6 months, so they aren't the issue.
I've also got a new brew thermostat on the way (last replaced ~2 years ago).
While cleaning the OPV I fully removed the adjustment valve (via the hex nut) and tried to screw it back to the same depth it was in before... I don't have a pressure gauge to re-calibrate. However the brew pressure was poor before fiddling with this.
The only thing left I haven't touched (or broken) is the pump.
I just ordered a new ULKA EX5 in the final hope of fixing the thing! Otherwise I've spent a good $200 on replacement parts and still a broken machine

Anyone with some more experience care to give insight or opinion on the problem?

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