Appliances that can be used to make changes to hose line

Appliances are one of the most beneficial tools for changes in pre-connected hose lines on a fire apparatus. There are many different types of appliances that can be used to make changes to hose lines at an emergency fire incident. Discuss the following three appliances: gated wye, water thief, and Siamese connection. For each appliance, discuss the advantages and disadvantages. Conclude the discussion by giving an example of a scenario in which you would use the appliance at an emergency fire incident.