How to Adjust the Pressure on a Lelit Victoria (PL91T) — Complete Guide
✓ Updated June 2026 · Authorised Lelit Service Dealer · Di Pacci
Quick Answer
To adjust the brew pressure on a Lelit Victoria PL91T: switch off and unplug the machine, let it cool for 30+ minutes, remove the side panels to reach the internal Over-Pressure Valve (OPV), pull the hose off the top of the valve, and turn the brass adjustment screw with a flathead screwdriver — counterclockwise to lower pressure, clockwise to raise it. Adjust one quarter-turn at a time. After each turn, reconnect, heat the machine fully, run a blind basket test, and read the front manometer. Repeat until the gauge settles at 9 bar with the blind basket installed.
The Victoria ships from the factory at about 10–10.5 bar. For home espresso with a single-wall basket, 9 bar is the correct target. This is a one-time setup — once set, you won't need to touch it again unless pressure drifts.
9 barTarget Pressure
10.5Factory Default (bar)
¼ turnPer Adjustment
20 minOne-Time Setup
The Lelit Victoria PL91T is one of the most capable single-boiler home espresso machines sold in Australia — a 58mm commercial group head, PID temperature control, programmable pre-infusion, and a front-mounted backlit manometer that shows brew pressure in real time. Learning to read that gauge and set your machine to 9 bar is the single most impactful change most new owners can make, and it costs nothing but twenty minutes. This guide walks through exactly how to do it safely, written by the service team at Di Pacci, an authorised Lelit service dealer.
What Pressure Should a Lelit Victoria Run At?
The short answer
A Lelit Victoria should run at 9 bar of pressure at the group head for espresso. Set the OPV so the front manometer reads 9 bar with a blind basket installed and the pump running. The factory setting of ~10–10.5 bar is intentionally high to suit pressurised baskets and ESE pods; for single-wall baskets, 9 bar is correct.
Espresso extraction is conventionally standardised at 9 bar of pressure. At 9 bar, a well-prepared puck extracts evenly — developing the oils, acids, and sugars that produce a balanced, sweet, complex shot. Significantly higher pressure can produce harsh, bitter, or astringent flavours and increases the risk of channelling. Significantly lower pressure under-extracts, giving sour, weak, watery results.
Lelit ships the Victoria calibrated to roughly 10–10.5 bar — deliberately higher to accommodate pressurised (crema-enhancing) baskets and ESE paper pods, both of which benefit from extra pump pressure. Once you move to a quality single-wall basket and a standalone grinder — the setup most home baristas progress to — that factory pressure is excessive, and lowering it to 9 bar produces clearly better espresso. This isn't a modification; it's simply calibrating the machine to the espresso standard.
"Adjusting your Victoria's OPV to 9 bar is the single most impactful setting change most new owners haven't made — and it costs nothing but 20 minutes."
One important note: the manometer shows the pressure produced by the pump, not the exact pressure at the coffee puck (which varies slightly with grind resistance). For calibration, the standard method is a blind basket — the solid basket with no holes — which lets the pump build to maximum pressure against a fixed resistance. 9 bar with a blind basket installed is the target.
Key Facts at a Glance
| Spec |
Lelit Victoria PL91T |
| Target pressure |
9 bar (single-wall basket) |
| Factory setting |
~10–10.5 bar |
| Pressure control |
Internal OPV (Over-Pressure Valve) |
| Pump rating |
Vibratory pump, rated to 15 bar |
| Group head |
58mm commercial |
| Adjustment access |
Internal — requires removing side panels |
| Calibration method |
Blind basket + front manometer |
| How often |
One-time setup; recheck every 6–12 months |
What Your Victoria's Pressure Gauge Is Telling You
The backlit manometer is one of the most useful diagnostic tools on the machine. During a shot, the needle rises as the pump engages and stabilises at the pump's operating pressure. Here's how to read it.
| Reading |
Meaning |
What to Check |
| 6–7 bar |
Too low — shots run fast and watery, lack body, taste sour or weak |
Grind too coarse, dose too low, or light tamp. Check grind & dose first. Persistent low pressure can signal a worn pump. |
| 9 bar |
Ideal — the espresso extraction standard. Balanced, sweet shots in 25–30s for a 1:2 ratio |
Target 9 bar with a blind basket. Expect 8–9.5 bar during real shots depending on grind resistance. |
| 11–12 bar |
Too high — shots taste harsh, bitter or astringent; channelling risk rises |
OPV set too high (the common factory-default issue) — or grind too fine. The fix is an OPV adjustment. |
💡 Check grind before adjusting the OPV. The OPV sets the maximum pressure ceiling — your grind determines where, within that ceiling, your shot actually runs. A coarse grind reads low even with a correct OPV; a fine grind reads high even at 9 bar. Verify grind and dose before concluding you need to open the machine.
What Is the OPV and How Does It Work?
OPV — Over-Pressure Valve
The OPV is a brass, spring-loaded relief valve inside the Lelit Victoria. When pump pressure exceeds the valve's set threshold, it opens and diverts excess water back to the reservoir — preventing pressure from climbing higher. It acts as the machine's pressure ceiling, and adjusting its spring tension changes where that ceiling sits.
The Victoria's pump is physically capable of 15 bar, but the OPV limits what actually reaches the group head and the coffee puck. On the PL91T the OPV is an internal component — it is not user-adjustable without removing the side panels (unlike machines such as the Profitec Pro 500, where the OPV is externally accessible). That's why this is a one-time setup rather than a daily dial.
Why the Factory Sets It Higher Than 9 Bar
Lelit sets the OPV to ~10–10.5 bar so the machine works well with the pressurised baskets and ESE pods it ships with — both need higher pump pressure to function. When you switch to a single-wall basket with a proper espresso grind, 10.5 bar is too high, and dropping to 9 bar produces cleaner, sweeter results. Professional technicians and the coffee community consistently recommend 9 bar for single-wall basket use.
The adjustment itself is a quarter-turn with a screwdriver. Accessing the OPV means removing the side panels — comfortable for most owners with basic tools.
🔩Flathead Screwdriver
To turn the OPV adjustment screw. Use small, deliberate quarter-turns — never force.
🔧Phillips Screwdriver
For removing the side panels. Standard Phillips screws at the rear and underside.
🏷️Blind Basket
The solid, no-hole basket (included with your Victoria) used to build maximum pressure against fixed resistance.
🧺Towel or Small Container
A little water drains when you disconnect the OPV hose — catch it before it reaches internal components.
⏱️20–30 Minutes
Allow full heat-up between each test (10+ min from cold). Rushing produces inaccurate readings.
📋Victoria User Manual
For the panel-removal diagram and OPV location specific to your production year.
⚠️ Safety — read before starting. Always switch off at the wall and unplug before opening the machine. Allow it to cool completely — at least 30 minutes from last use — before removing panels. The boiler reaches temperatures that can cause serious burns. Never adjust the OPV with the machine powered on or pressurised. If you're not comfortable, call Di Pacci on (02) 9758 0760 and our service team will calibrate it for you.
How to Adjust the OPV on a Lelit Victoria PL91T
Follow these steps in order. Don't skip the cooling and heat-up steps between tests — accurate readings need a fully heat-soaked machine.
-
Switch off, unplug & cool completely
Turn off at the main switch, unplug from the wall, and let the machine cool for at least 30 minutes. The boiler holds significant heat and pressure — do not open it while warm.
Tip: If the machine is already hot, run a shot, switch off immediately, and wait 30+ minutes so the boiler fully depressurises.
-
Remove the side panels
Panel screws vary slightly by production year — check your manual's diagram. Typically Phillips screws at the rear and underside. Remove carefully and keep them safe. With panels off, the boiler, pump, solenoid valve, and OPV are visible.
Tip: Photograph the internal layout on your phone before touching anything — it makes reassembly easier.
-
Locate the OPV
With the rear of the machine facing you, the OPV is on the right-hand side of the internal assembly — a brass cylindrical fitting with two hose connections (input from the pump at the top, return to reservoir at the side or bottom). It's distinct from the larger pump motor and the electrically-operated solenoid valve. If unsure, consult the parts diagram in your manual.
-
Disconnect the top hose & expose the screw
Place your towel beneath the OPV. Pull the hose off the top fitting (push-fit or clip-secured) — a little water will drain, which is normal. The flathead adjustment screw is now visible at the top of the valve.
Remember: Counterclockwise = lower pressure. Clockwise = higher pressure. Most owners are lowering from ~10.5 to 9 bar, so you'll turn counterclockwise.
-
Make your first adjustment — quarter turn only
Turn the screw one quarter-turn counterclockwise to lower pressure. The relationship between screw travel and pressure is non-linear, so small turns make meaningful changes — never do multiple turns at once. Reconnect the hose firmly, then replace the panels without fully tightening (you may need to re-access the valve).
-
Reconnect power, heat fully & run the blind basket test
Plug in, switch on, and heat for at least 10 minutes from cold — until the display shows your set brew temperature and holds steady for 2–3 minutes. Lock the blind basket into the group head and activate the brew switch. Let the needle stabilise and read the gauge carefully.
Target: 9 bar with the blind basket. Above 9.5 bar — switch off, cool, and turn another quarter counterclockwise. Below 8.5 bar — turn slightly clockwise.
-
Repeat until settled at 9 bar, then secure the panels
Cycle through — off, unplug, cool, adjust, reconnect, heat, test — until the blind basket reading consistently settles at 9 bar. Most initial adjustments take 2–4 cycles. Then unplug, cool, tighten all panel screws fully, reheat, and confirm 9 bar once more before pulling a real shot.
First shot after adjustment: it may taste different. Allow 2–3 shots to re-dial your grind — the correct grind for 9 bar may differ from your 10.5 bar settings.
Troubleshooting — What If the Pressure Is Still Off?
Blind basket reads 9 bar but shots still run too fast or slow
The OPV controls the maximum pressure ceiling, not shot flow speed or extraction time. If shots are too fast (sour) or too slow (bitter) after setting 9 bar, the cause is almost certainly your grind size, dose, or tamp. The OPV is done — now dial in your recipe. Start with 18g in, target 36g out in 25–30 seconds.
The gauge fluctuates during the shot
Some variation is normal — pressure rises during pre-infusion, stabilises during extraction, and may ease as the puck saturates. Significant swing (the needle moving 2+ bar) usually points to channelling or an inconsistent tamp. Check puck prep before touching the OPV again.
Pressure stays below 9 bar even with the OPV fully tightened
If the blind basket reads consistently below 8 bar with the OPV turned fully clockwise, the issue is likely the pump, not the valve. Vibratory pumps have a finite life — typically 3–7 years of regular home use — and a worn pump loses output. Contact Di Pacci's service team or call (02) 9758 0760 to assess and replace it if needed.
🔧 Not confident doing it yourself? Di Pacci performs OPV calibration as part of our standard Lelit service. If you bought your Victoria from us, bring it in for a setup check — we'll calibrate the OPV, verify temperature accuracy, and confirm the machine is running correctly. Call (02) 9758 0760 or visit any of our five Australian stores.
Frequently Asked Questions
Related Guides
Need Help With Your Lelit Victoria?
Di Pacci is Australia's authorised Lelit service dealer. If you'd rather not adjust the OPV yourself — or you suspect a pump or pressure fault — bring it in. We service Lelit machines in-house across five Australian stores: calibrating the OPV, checking temperature accuracy, and confirming everything runs correctly.
Book a Service →Shop the Victoria PL91TCall (02) 9758 0760
