Rectangular Callout: 10mm under floor Rectangular Callout: 2 port motorised valveRectangular Callout: 15mm flow Rectangular Callout: 15mm return Rectangular Callout: Do I need a pipe with air bleed vent here ?

To existing towel rails
 
Plan view

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rectangular Callout: Do I need a pipe with air bleed vent here ?Side
Elevation