How to loosen Delta 1600 shower valve bonnet nut(retaining?

 

It took me only 15 minutes to take photos and upload them to ChatGPT, have it recognized and then get catridge ordered from Amazon and thought I could avoid $150-$200 of plumber call (saving of about $100-$150). But this nut is stuck. Plier wrench could not open it. 

Do I need to spray with WD40? or venegar? 

Some youtube videos suggest to cut it (https://www.youtube.com/shorts/5zvPuryfYZE  ), but this is about $100 part on Amazon. There is risk to cut into the thread underneath 

https://www.amazon.com/Delta-Replacement-1600-Bonnet-RP6079/dp/B0CZ3N31RJ?

HD

https://www.homedepot.com/p/BrassCraft-Delta-Bonnet-for-1600-Series-SWD0230/313848800?MERCH=REC-_-pipsem-_-202985478-_-0-_-n/a-_-n/a-_-n/a-_-n/a-_-n/a

$15 but it would take a few days to get it. 

 

https://www.youtube.com/shorts/j90pI-TU6mA

this is a trick I could try. 

https://www.youtube.com/shorts/8dJOQ1x24IE

One more trick. This trick worked for me. I do not have rubber gasket so I put alumnium tape (hot exhaust tape) and it can easily pushed into groove on top of bonnet nut. 

This puller helped me pull this out. Two point contact tool works much better than single point contact tool like plier to pull this catridge out. 

 

 

 

所有跟帖： 

• 找个尾巴上有个螺丝可以拧紧钳子扣的，夹紧慢慢拔出来。 -borisg- ♂ (0 bytes) () 09/13/2025 postreply 20:08:52

• 里面应该有个clip固定，我想你已经拿出来了吧？ -柠檬椰子汁- ♂ (6461 bytes) () 09/13/2025 postreply 20:18:01

• I could not loosen black retaining ring that holds catridge -RomaVacation- ♂ (385 bytes) () 09/13/2025 postreply 20:27:51

• 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

• yep, remove the clip. and you will laugh why you won’t. -leslieking- ♂ (0 bytes) () 09/15/2025 postreply 21:55:00