Furniture fittings for return plumbing?

[pmcustom]

Can you use pvc furniture fittings (like the 3 way elbow) for return plumbing? It would be really convenient, and there shouldn't be much pressure.

 

[flowerseller]

Isn't it schedule 40 also?

 

[pmcustom]

yes I think so, they just don't look near as strong...for instance, i don't think they have as much glueing surface. i was hoping someone would have some experience using them.