Downloads
Consumer Information
The Consumer Booklet covers everything the customer needs to know about the all new Willis Solasyphon and how it works.
Download Consumer informationTrade Information
The Trade booklet takes a more in depth and technical look of the workings and installation of the Willis Solarsyphon.
Download Trade informationTechnical Instructions
The Technical Instructions provide you with installation instructions for the Willis Solasyphon with your existing Pressurised or Vented water heating systems.
Download technical instructionsTest Results
A report by the University of Ulster into performance tests carried out on the Willis Solasyphon
Download test results