Pole120
Addicted CEG'er
you know what might be a good idea? sending 2 upgraded o-rings with each filter. if it needs to be at a additional cost. one for back up.
There's no reason a quality o-ring should fail, i think supplying the unit already fitted with an upgraded piece would be sufficient, but if someone wants additional rings, they'll just have to pay for them, and o-rings are cheap.