3rd Valve leaking water

[Trumpetstud]

So my 3rd valve is leaking and I'm wondering if that can be fixed, and what's causing it? Is it worn out?

Any repair guys out there that could give some guidance?

Thanks

My horn is a (I think) 70's Bach Strad 37
90025 ML

[JayKosta]

If water is dripping out of the hole in the bottom valve cap, then try a heavier oil to give a better seal between the piston and casing.

If you do not have a 'heavy oil' easily available, I suggest using Mineral Oil from the drug store (clear, no fragrance, no ingredients other than oil) - e.g.
https://www.cvs.com/shop/cvs-health-mineral-oil-usp-lubricant-laxative-prodid-1011823

Apply to piston with finger tip, and insert into casing, then add regular valve oil until action is acceptable. It can also be used straight on the 1st and 3rd slide.

If drip is from the slide itself, then try a heavier grease on the slide.
_________________
Most Important Note ? - the next one !
KNOW (see) what the next note is BEFORE you have to play it.
PLAY the next note 'on time' and 'in rhythm'.
Oh ya, watch the conductor - they set what is 'on time'.