Selgas
A pressure pump is just a simple pump usually connected to an electric motor which has an adjustable min and max pressure setting on it’s actuating switch. You can set it to your desired max working pressure and it will boost the town supply pressure from 40 psi up to want you have set it for.
They are available from any good pump outlet store. 
Selgas Services Ltd
Craftsman Gasfitters, Plumbers, Electrical Service Technicians
