Popup drain by Oceanstone easy install just screw in from top side
For this drain system, plumb your rough plumbing drain pipe with 1 1/2 " PVC
stub up 5" above floor grade, leave space around stub up in case you need to cut below grade.
When your terrazzo stone bathtub arrives, measure inside tub drain hole to floor deduct for your fitting adapters, such coupling, FA adapter and Oceanstone flip drain tailpiece. (note) then add 1/2 " for threading flip Drain into FA Adapter
(Note) the adapter supplied has been re-machined to fit NPS Treads on the Oceanstone drain tailpiece
Mark guidelines on the floor with tape or marker where drain hole is located. Move bathtub over drain hole pipe and install your drain in the bathtub. Use silicone or plumbers putty to safeguard against leaks. Perform water leak test before filling the bathtub full.
Fill in space around drain with Mapei unsanded grout to match color of bathtub (product available Lowes and Home Depot