Comparison of the bladder replacement jobs between Top Disassembly Type (NACOL products) and the Bottom End Disassembly Type (Non-NACOL products) is on Video. The bladder replacement job of the Bottom End Disassembly Type (Non-NACOL products) requires a chain block and 2 workers.
Whereas, Top Disassembly Type (NACOL products) requires only 1 worker and you don’t have to prepare chain block.
Top Disassembly Type allows you to replace bladders readily without removing from the piping by yourself.

Explanatory comparison of the bladder replacement jobs between “NACOL Accumulators” and “Non-NACOL Accumulators” is on The bladder replacement job of the Non-NACOL Accumulators requires 2 workers × 30 minutes. (So, 60 minutes in total) Whereas, NACOL Accumulators require only 1 worker × about 10 minutes ! (about 1/5 of the Non-NACOL products) The feature of NACOL accumulators that allows so short time bladder replacement can be confirmed on the Video.