Vented Systems - Boosting a shower, bathroom or whole house?

Selecting the right pump for a gravity fed plumbing system depends on a number of factors.

What will the pump be used for?

A shower - boosting the water pressure and flow from a single shower

A bathroom - boosting the water pressure and flow to all outlets within a bathroom

The whole house - boosting the water pressure and flow to multiple outlets and appliances throughout the property