Access the inner housing of the coffee maker by:

removing tie wrap from three-way valve with a pair of scissors;

Requires a lot of force.

disconnecting the three-way valve from the hose. Beware of possible breaking of the bottom tube of the valve that is inside the boiler opening;

Difficulty with pulling, needs sculling.

tilting the boiler, towards you (away from the inner casing).

When filled with (hot) water, beware of boiler leakage.