I could not loosen black retaining ring that holds catridge

ChatGPT suggests this bonnet nut wrench. 

I will try WD40 spray and soak 1st tomorrow. I tried gental hammer to loosen it but no luck. 

https://www.youtube.com/watch?v=oB1jRBEzfOc

2:44. He plied it so easily. Mine is too tight.

所有跟帖： 

• use pipe wrench -borisg- ♂ (0 bytes) () 09/13/2025 postreply 20:30:28

• Thanks. I will get one tomorrow -RomaVacation- ♂ (0 bytes) () 09/13/2025 postreply 20:36:46

• I used this trick. Did spray WD40 1st -RomaVacation- ♂ (714 bytes) () 09/14/2025 postreply 20:26:27

• 我只敢用plier wrench，pipe wrench我怕把后面的管子扭坏。 -柠檬椰子汁- ♂ (0 bytes) () 09/13/2025 postreply 20:37:23

• 跟卸煤气管一样，需要两把钳子，一里一外反向卡死地扳 -borisg- ♂ (0 bytes) () 09/13/2025 postreply 20:50:37