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Worcester Bosch Greenstar Compact Amend Pressure Relief Valve - Black And Red | Worcester 87186439890 | National Shower Spares
![Combi boiler (Worcester Bosch Greenstar 30 Si mk.4) system pressure gauge always reads 0 psi. Central heating and hot water seem to work just fine. Why is the gauge always 0, and Combi boiler (Worcester Bosch Greenstar 30 Si mk.4) system pressure gauge always reads 0 psi. Central heating and hot water seem to work just fine. Why is the gauge always 0, and](https://preview.redd.it/combi-boiler-worcester-bosch-greenstar-30-si-mk-4-system-v0-gb7mofyz8tea1.jpg?auto=webp&s=c1623e6cfe95095fb2d6b166defe0e79cc0cd24c)
Combi boiler (Worcester Bosch Greenstar 30 Si mk.4) system pressure gauge always reads 0 psi. Central heating and hot water seem to work just fine. Why is the gauge always 0, and
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