M9 Tee & Gauge(For Flair Pro2)
Pairs well with
M9 Tee & Gauge(For Flair Pro2)
The Flair Pro Tee is a precision-machined connector designed for Flair Pro Series espresso makers. It allows the BOOKOO EM Pressure Sensor to work alongside your original mechanical gauge, adding digital pressure monitoring without changing the way you brew.
Compact and easy to integrate, it preserves the original functionality of your Flair Pro while providing a reliable connection for consistent pressure data throughout extraction.
When paired with a BOOKOO Themis smart scale, it enables real-time tracking of pressure, weight, flow rate, and brew ratio, giving you deeper insight into every shot.
Compatible Models
Flair Pro 2 & other M9-port models
Machine-End Thread
(Thread OD)
M9 (Flair Piston Port Standard)
(9.72mm)
Sensor / Gauge Port
Dual G1/8 female ports
Tee Weight
~38g
Mechanical Gauge Weight
~55g
Operating Pressure (Recommended)
0–12 bar
Tee Material
304 Stainless Steel
Installation Method
100% Reversible.
Replaces OEM piston rod;
no machine modification required.
BOOKOO Product Integration
BOOKOO EM Pressure Sensor
/Real-Time App Curve Monitoring
What's in the box (TBC)
M9 Tee, Mechanical Gauge
What's is the Box
Here are all the items included when you purchase the Tee&Gauge.
Specifications & Compatibility Guide
E61 grouphead espresso machines
(e.g., Rocket Appartamento HX, etc.)
Cafelat Robot manual lever espresso makers
Flair Pro 2 & other M9-port models
Flair 58 (all variants) & Flair 49 Pro
& Flair 2Go
M6×1.0(E61 OEM Standard)
( 6mm )
M5×1.0(Robot OEM Bleed Port Standard)
( 5mm )
M9(Flair Piston Port Standard)
( 9.72mm )
G1/8 female thread （Universal）
( 9mm )
Dual G1/8 female ports
Dual G1/8 female ports
Dual G1/8 female ports
Dual G1/8 female ports
~175g
~75g
~38g
~38g
~55g
~55g
~55g
~55g
0–12 bar
0–12 bar
0–12 bar
0–12 bar
304 Stainless Steel
304 Stainless Steel
304 Stainless Steel
304 Stainless Steel
100% Reversible.
Replaces OEM M6 plug;
no machine modification required.
100% Reversible.
Replaces OEM bleed port screw;
no machine modification required.
100% Reversible.
Replaces OEM piston rod;
no machine modification required.
100% Reversible.
Replaces OEM piston rod;
no machine modification required.
BOOKOO EM Pressure Sensor
/Real-Time App Curve Monitoring
BOOKOO EM Pressure Sensor
/Real-Time App Curve Monitoring
BOOKOO EM Pressure Sensor
/Real-Time App Curve Monitoring
BOOKOO EM Pressure Sensor
/Real-Time App Curve Monitoring
E61 Tee, Mechanical Gauge,
Installation Tools
Robot Dedicated Tee, Mechanical Gauge,Installation Tools
M9 Tee, Mechanical Gauge
G1/8 Tee, Mechanical Gauge
FAQs
Can I purchase the BOOKOO Tee separately without the pressure gauge?
- Currently, our website does not support purchasing the Tee separately. BOOKOO Tees are designed to be sold as a fixed kit with the pressure gauge.
- Due to threading compatibility, using the Tee with other coffee machines or third-party pressure gauges is not feasible.
- For further questions or assistance, please feel free to contact us.
Can I use the BK Tee or pressure gauge separately?
- Yes, but compatibility depends on your setup. Please make sure the thread size matches, the O-rings or seals are installed correctly, and any unused ports are properly sealed to prevent leaks.
- For safe setup details, please refer to this guide.
Can the BOOKOO Tee be used with non-BOOKOO pressure sensors?
- Yes, but only if the thread size matches. Third-party pressure sensors are not guaranteed to be compatible with the BOOKOO Tee.
- If you plan to use the BOOKOO Tee with a non-BOOKOO pressure sensor,
please follow the details carefully.
How do I install and adapt the BK Tee?
- Install the EM on the short side of the BK Tee marked “BK”.
- Before tightening, make sure the Tee is fully seated and the O-ring is correctly positioned.
- Do not remove the red O-rings, as they help seal the connection and prevent leaks.
- For compatibility, confirm the thread type of your machine or adapter, such as M6, M9, or G1/8.
- For detailed installation videos and compatibility guidance, please refer to the official guide.
What should I do if there is water leakage at the Tee connection?
- If water leaks from the Tee connection, stop using it first and check whether the Tee is fully seated, the O-ring is correctly positioned, and the red O-rings are still in place. Re-tighten gently, but do not over-tighten.
- If leakage continues, you can learn more about the sealing steps here.
How to fix a tilted pressure gauge after installation?
- A tilted gauge is usually caused by normal thread tolerance. Slightly loosen the gauge connection on the Tee, rotate the gauge until the 0-mark faces forward and looks level, then run a blind basket test to check for leaks.
- If minor leakage appears, apply PTFE tape to the threads and test again.
- For full adjustment steps, please follow the details.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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