check valves/non-return valves.

[ALIHISGREAT]

are they the same thing?

[windshrike]

I'd guess so; the term 'non-return' is the same as the action of a check valve.

[ALIHISGREAT]

i was jsut confused cos on the website i am ordering my parts from they had cheack and non-return valves seperatly

[Hubb]

are they the same thing?

Yes.

[windshrike]

What's the site? Do they have any diagrams or pictures?
That would help determine any difference a lot.

EDIT: Just checked, they are the same thing.

[ALIHISGREAT]

the website is http://www.pneubits.com/

[jackssmirkingrevenge]

Yes.

Coincidentally that site you linked to concerns HPLC (high performance liquid chromatography) instruments, the kind I work with in the lab