I buried a 2" pipe between my veggie pond and main pond. I think the
Pondmaster 3600gph pump might come down in price now that the newer
model is out, so I was thinking of getting a second one. Do you think my
2" pipe would support 7200gph?

Thanks

Mike

It depends on length and Pump pressure, and head pressures.
120 GPM would not be uncommon with a good pump.
although I say 100 with a Home Depot style pump.


7200 GPH \ 60 M =120 GPM
3600 GPM \ 60 M = 60 GPM

Cost and desired water flow will answer your question.