The collector manifold casing and the end cap are made of silver aluminium profile or brown aluminum plate. The copper inlet and outlet pipe nipples come standard in OD 22 mm, making plumbing connections quick and easy using readily available metric compression fittings. The 50 mm thick, FC free polyurethane insulation is used to reduce heat loss effectively.

The connection between heat pipe and manifold is critically important to ensure optimal heat transfer. The manifold header pipe is mounted within the manifold casing and is made of F28 mm, 1 mm thick copper pipe for SEIDO1/5 collectors and F38 mm for SEIDO10 collectors rated for a maximum pressure of 10 kg/cm² - standard use is 6 kg/cm². Its design is suitable for collectors with 8, 16 and 20 vacuum tubes. The condenser section of heat pipe is tightly inserted in the heat pipe port ensuring a dry connection between heat pipe and heat transfer fluid. The dry connection is one of the most significant advantages of Sunda heat pipe tubes since it makes the collector modules particularly suitable for applications with poor water quality. The dry connection also allows the system to operate with high pressure of up to 10 bar which is especially useful in large heating or air condition projects. Additionally, dry connections eliminate the leakage problem between manifold and vacuum tube and make it easy to replace collector tubes at any time without interrupting the operation of the system.