1/2 in. NPTF Quick Coupler Body

[rasorbackq]

Both my rear valves are dripping fluid.
What is the rubber O ring size I need.
I have a 407 piece O ring set but none work. still a little leak or it just pours out.

 

[CincyFlyer]

Just pitch the couplers and buy new; they are cheap.

 

[RickB]

They don’t all take the same size or spec o ring.