Overflow ?

Is it safe for me to use 1" pvc for the overflow and 3/4 for the return. Going to use a mag drive 9.5 return pump.

 

Yes, they can be different sized pipes.

 

just keep in mind that your overall over flow should be rated higher then your return, so all other things equal 1in is rated higher then 3/4 inch.

 

Thanks alot!

 

I would prolly do the 1 inch pipe and then enlarge it to 1 1/2 inchs that way you can get away with the toilet flushing sound of a 1 inch pipe