This Shades of Coffee branded 40mm black and chrome brew pressure gauge is designed to fit the TopBox, but could also be used within any other 40mm hole in a Classic (eg cut into the case) if required.
This kit INCLUDES our brew pressure gauge adaptor and other associated hardware for installation and fitting, as shown within the CONTENTS tab
It is a true brew pressure gauge - providing a display of pressure being experienced at the puck. Most (if not all) other Gaggia Classic pressure gauge kits are tapped into the pump-to-boiler pipe, or elsewhere, and provide only a pump/boiler pressure - rather than actual group pressure. Due to the flow restrictor within the solenoid valve, the pump/boiler pressure can be quite different to the actual group pressure.
Most other pressure gauge kits also require you to cut pipes or otherwise damage the original machine. This kit can be installed and removed without signs of it ever being present, and without damaging the original machine in any way (if mounting within a TopBox).
To match the Classic and TopBox colouring, the gauge has a black face, surrounded by a bright chrome ring and shows 0-16 bar pressure.
Our gauge is constructed entirely of metal and does NOT have any glycerin or liquid filling - as this isn't required and is often unsightly.
The kit includes all necessary parts for fitting, along with instructions for installation within a TopBox.
You'll need basic tools for fitting within the TopBox, including:
- Allen keys
IMPORTANT NOTE that the standard valve adaptor may not fit "pre-Philips" machines with a larger solenoid valve and some larger solenoids fitted. If you have such a machine (typically pre-2007) you will need our slightly different version of this kit with a "wider / lower" brass adaptor - which you can find here. If you have a 2007-2010 machine then send us a photo of the solenoid valve, if you're in any doubt, and we'll let you know.
Not seeing 9 bar? We receive numerous emails from customers who have installed our OPV mod and 9 bar spring, who are concerned that when extracting espresso they are seeing much lower pressures than 9 bar. This is because the OPV sets the MAXIMUM pressure (which will be limited to around 10 bar of static pressure with the 9 bar spring) - whereas the ACTUAL brew pressure is generated by the resistance (to water flow) of the coffee puck. If you're seeing lower pressures on the brew gauge then your puck resistance is lower, and to increase the puck resistance (to water flow) you need to either dose more and/or grind finer. With greater resistance to flow, the pressure will increase - up to 9-10 bar (but at 10 bar it'll probably be choked). Much lower pressures will be prevalent in "gushers", where the puck resistance is much too low and the water runs through far too quickly.
This kit contains:
Our pressure gauge kit contains everything you need, except for the few basic tools that are shown as being required on the "Description" tab:
- Shades of Coffee branded 40mm black 0-16 bar pressure gauge with 60cm coiled plastic coated capillary tube
- Brass solenoid valve adaptor
- Replacement o-rings for solenoid valve and adaptor
- Mounting bolts for solenoid valve and valve adaptor
- Heat-break fitting for valve adaptor
- Heat-break fitting for pressure gauge
- 10cm of PTFE heat-break pipe
A link to the installation documentation, for installation within a TopBox (other than the actual mounting of the gauge within a hole, this is also relevant to the mounting of the gauge in a 40mm case hole)
MANUAL DOWNLOAD - Some people appear to miss the fact that the manual for the gauge kit is downloaded from the URL that is written on the label on the box that the gauge comes in. It's not small, it's not inconspicuous, it's typed in black text on a white background, on the only label on a small white box and it starts with "Manual:" in bold text... it's not difficult to find! For recent customers, a digital download link to the manual should also be sent to you when you checkout.
DISCLAIMER: The installation of any of our parts or kits, and any modification of any espresso machines undertaken by reference to our installation and/or user guides, should only be conducted by persons with proper electrical safety knowledge who are capable and qualified to undertake such work and modifications. Many of the components within espresso machines operate at high temperature, high pressure and with mains electrical voltages at high current in the presence of water – any of these could cause serious personal injury, shock, burns, fire, explosion, other property damage and possibly death. We shall hence not be liable for any damage to property, personal injury or other loss caused by the improper or incorrect use of the aforementioned installation and/or user guides or the provided kit(s) or any of those kit’s component or constituent parts. By commencing installation of our kit(s) you agree to accept all liability associated with the modification of your espresso machine, and agree to hold us in no way responsible or liable for any loss, damage or injury howsoever, wherever or whenever caused. You further agree to indemnify us and our agents, officers, directors and employees, immediately and on demand, against all claims, liability, damages, costs and expenses, including legal fees, arising out of any installation, use, misuse or failure of any of our kits or component parts thereof.