- Help Center
- LUCCA M58 by Quick Mill
- General Maintenance
-
Getting Started
-
Espresso 101
-
Warranty, Ordering & Returns
-
Bezzera BZ10
-
Bezzera Duo DE
-
Bezzera Duo MN
-
LUCCA A53 (Direct Plumb & Mini) by La Spaziale
-
LUCCA M58 by Quick Mill
-
LUCCA S58 by Profitec
-
LUCCA X58 by Quick Mill
-
La Marzocco Linea Mini
-
La Marzocco GS3
-
Lelit Bianca
-
Lelit Elizabeth
-
Lelit Victoria
-
ECM Synchronika
-
ECM Special Edition Classika PID
-
ECM Mechanika V Slim
-
ECM Casa V
-
ECM Puristika
-
Profitec Pro 300
-
Profitec Pro 400
-
Profitec Pro 500
-
Profitec Pro 600
-
Profitec Pro 700
-
Profitec Pro 800
-
Rocket Appartamento
-
Rocket R58 / Cinquantotto
-
Rocket Giotto
-
Rocket R Nine One
-
La Spaziale S2 EK
-
Rancilio Silvia
-
Rancilio Silvia Pro
-
Rancilio Silvia Pro X
-
Izzo Alex Duetto
-
Quick Mill
-
Breville Oracle
-
Dalla Corte Mina
-
Slayer
-
Lucca Grinders
-
Baratza Grinders
-
LUCCA Atom 75
-
Eureka Grinders
-
ECM Grinders
-
Compak Grinders
-
Fellow ODE Grinder
-
Mahlkonig Grinders
-
Profitec Grinders
-
Breville Grinders
-
Dalla Corte Grinders
-
Macap Grinders
-
Fiorenzato Grinders
-
General Troubleshooting
-
Like New & Trade-In Program
-
Eureka Mignon Libra
-
Eureka Mignon Libra User Manual
-
Rocket Boxer Setup Guide
-
Rocket Boxer Timer User Manual
-
Baratza Encore ESP Setup Guide
-
Baratza Encore ESP User Manual
-
Fellow Opus User Manual
-
Fellow Opus Setup Guide
LUCCA M58: Cleaning Inlet Check Valve
Below are instructions for removing an inlet check valve on your Quick Mill LUCCA M58. This is useful if the check valve is allowing water back into the water tank or sending excess pressure out of the water line inlet. (Difficulty ☕☕☕)
Before testing this you can attempt to mix a citric acid solution in with your water in your water tank and draw about 4 ounces of the solution into your machine into the machine. If you run the group head for 14 seconds you'll have drawn about 4 ounces. Once this is done turn your machine off.
This will saturate the descale solution in the inlet assembly so that any scale on the check valve will be loosened and removed. After 45 minutes of waiting dump out the citric acid solution from your water tank and refill it with regular water. Draw 8 ounces of water out of the group head to get all of the citric acid out of the inlet assembly and then follow these instructions to drain the boilers and refill them with fresh water. If your machine is still leaking follow the instructions below.
Tools required:
- 2x adjustable wrench
- 12mm crescent wrench
- 15mm crescent wrench
- 17mm crescent wrench
- Diagonal cutters (or scissors)
First, remove the panels.
V2 Lucca M58:
1. Remove the water reservoir tray to access the check valve and OPV assembly. Identify the check valve.
2. Remove the steam boiler line compression fitting.
3. Remove the brew boiler fitting connection.
4. Remove the flexible tube from the top of the OPV.
5. Use two wrenches to unscrew the check valve.
6. Remove the internal check valve components and soak in a descaling solution to clean.
7. Reassemble the check valve and reinstall in the machine. It may be helpful to reconnect the fittings in the same order they were removed, i.e. steam boiler fitting first, brew boiler fitting next, then flexible tube.
V1 Lucca M58:




Rebuild and test.