Where can I get extra bulkhead gaskets

[Bamm Bamm]

where can I get extra bulkhead gaskets???? I'm installing a inside overflow box onmy back wall and need gaskets to go in between the wall of the tank and the overflow box..these are for 1" bulkheads

[Agu]

The washers on RO/DI prefilters, micron and carbon filters, fit perfectly for my DIY (schedule 40) 1" bulkheads. Couldn't find them anywhere else.

Agu

[ddenham]

I wonder if you could cut one from EPDM (pond liner)? Many people use it for skimmer gasket material.

[Zephrant]

aquaticeco.com has them. I've bought extras to go between two sumps when I bolt them together with bulkheads.

Zeph