What type of PVC Glue?

[wetshoes1]

I need to replace a 3 port valve which entails glueing some pvc parts.

I know there are a number of pvc glues.

What type of glue is recommended?

[CarlD]

If you are using hard PVC, not flexible, for all pieces, then they all should work. For flexible PVC, use the blue stuff.

[wetshoes1]

at one joint i'll be connecting sch 40 to the flexible pipe coming from main drain & skimmer.

[CarlD]

at one joint i'll be connecting sch 40 to the flexible pipe coming from main drain & skimmer.

Use the blue stuff. You can use it for everything anyway, but it's better for the flex.