Lock Ring

I have a standard swim pro voyager cartridge filter system for a above ground pool, I do not know if its a 1750 or a 2000.

3 times in the last month the lock ring has split, all the pipes and hoses from filter to pool running through the heater and the chemical feeder are clean and clear, yet somehow the big plastic lock ring splits. What would be causing the pressure to blow this piece to bits?

Thanks

We’d be glad to assist you. What is the pressure reading on the filter gauge when the pump is running? Is the cartridge clean? Are all the valves open and is water returning to the pool like normal?