Turbulent flow out of one tap, not the other

Brewing Processes
1

I’ve had a 2 tap tower for God knows how long-- 10 years?  and in the past 4 months or so my left tap pours very turbulently… almost like the beer is spinning out as it comes out the faucet.

Both kegs are in a 42F fridge.  I have gone through different kegs including a clean keg with just water-- same result.  Different levels of pressure, from 3 PSI all the way up to 20 PSI.  Ball lock disconnect to 8-10’ of 3/16" tubing.  Up to a 12" tower, 90 degree shank, and out through old Perlick 425SS faucets.

I’ve replaced the disconnect-- I thought this was it, because the old disconnect had a mashed up washer.  Not the fix.  Again, the right tap works like a charm.

If I turn the faucet off and back on sometimes I can get it to pour more normally.  Is there something inside these perlicks that can get cockeyed and cause turbulent flow?

2

I’d take the faucet apart, clean and inspect. Quite a few O-Rings inside.

3

you seem to be onto something.  The main gasket that seats the faucet against the shank assembly/coupling nut looked to be a little comprimised.  Not quite straight and somewhat compressed.  I’ve reseated it, and it’s better but not perfect… ordering a new one.  Thanks for the help!