This tank clamp O-ring replacement for my pool and spa filter fits perfectly. This is a specific part so pay attention to the part number pt (ccp 520/420/320 Not to much bustle about this O-ring other than it is used to replace a worn-out Pentair o-ring and it needs to work. It works and has great performance, ake sure to put some lubricant on it and you will be back in business in minutes.
Rating: [5 of 5 Stars!]