Struggling to remove the stuck bonnet nut to fix a leaking Valley shower cartridge – any other suggestions besides heat?
Asked by بیتا سهيلي راد 
3 months ago
Last Updated: June 27, 2024
I’m attempting to take off this cover (possibly known as a bonnet nut?) to replace the dripping shower cartridge. It’s a “Valley” brand, even though they’re out of business, it seems like parts are still around.
But, I’m having some trouble getting it off. I’m planning to try using a torch tomorrow to heat it up… any other suggestions?
Update: the heat gun didn’t do the trick… ended up using hot steam with vinegar to break up the build-up.
Just a heads up, there are plastic components in there so using a torch might not be the most suitable option.
You know, I had to grab some Channellocks because I had to use a pipe wrench to loosen mine up. ‘t forget to add anti-seize when you’re finished.
Use PB Blaster penetrating oil.
Pb blaster is my go-to when nothing else works. Can’t apply heat due to plastic involved
Oh, by the way, Schneider’s hair dryer doesn’t heat up as much as the heat gun.
Spray some penetrating oil on it and let it sit overnight.
If the penetrant isn’t doing the trick, I would try cutting a slot on opposing sides and using two flat blade screwdrivers as levers to turn.
To remove it, consider using PB Blaster or a similar solution along with a Stilson wrench, applying gentle pressure.
When using a torch, I recommend exercising caution to avoid melting plastic. Consider using PB Blaster or AeroKroil as an alternative.
I was thinking about recommending Aerokroil, it’s the best. Or you could try using FreeAll from the plumbing supply store. Just be careful not to use heat after applying FreeAll, it could catch fire.
To dissolve the calcium, you can use CLR or vinegar and let it sit for a few hours. Make sure to hold the valve body steady while twisting off the collar. You could also try using penetrating oil.
When dealing with plumbing, calcium build-up is often a problem. I typically stuff the fixture with a paper towel and soak it in white vinegar. This method usually works for me, but it does take longer than a plumber would prefer. I let it soak for an hour and then repeat if necessary. CLR can speed up the process, but it is more harsh.
Try using a PEX and upgrading to a more recent model to resolve the issue.
It doesn’t make sense for a liquid to be tight, right? 🤷🏻♂️
One option is to use a hair dryer or a heat gun to warm it up before spraying it with pb blaster or creep penetrating spray. Let it sit for about half an hour, and then use channel locks to loosen it.
Question: Do you think you have the necessary replacement parts on hand, or are they unavailable at the moment? If you can’t locate the parts, what is your plan? Will it take a few days to get the needed parts? In the meantime, is the water in your house still turned off, or does this shower have its own shut-off valves? Considering it’s an old model, have you thought about updating it with a new valve?
Use channel locks on the front of the cap. Be cautious not to damage the threads by accidentally squeezing them while trying to loosen. Avoid unnecessary struggle!
The treads are clogged with hard water. Try tapping all around first and then use channel locks. It might require multiple attempts and be sure to avoid applying excessive pressure with the pliers.
You might want to start by turning off the water main to relieve the pressure. Then, open a faucet and give it a try.
Update: So I tried using a heat gun on it, but no luck. Then I decided to hit it with a hot stream of water and vinegar… and it actually worked!