I need to repair a six port manifold on my 1990 cal spa. When using flexable PVC should special cement be used? I can only find PVC cement rated to 100 Deg. F. Can anyone help?
Thanks,

i used reg pvc cement on mine worked fine.

there are all different types of cement for different applications.
It is dependant on what type of materail you are gluing into what type.
EXAMPLE: pvc-abs , flex- abs , cpvc-pvc , ect
there is a glue for any applications , suggest you use a glue and cleaner for whatever the application.
Keep in mind you need a cleaner and a glue !