If you don’t like to read, you haven’t found the right book

Are all AC Schrader valves the same?

All Schrader valves used on tires have threads and bodies of a single standard size at the exterior end, so caps and tools generally are universal for the valves on all common applications. The core of the valve can be removed or tightened with a tool.

What is a Schrader valve for AC?

An AC Schrader valve is a common valve found in the air conditioning system. They are located in the low and high side ports of the A/C system where the valve core is threaded. Inside the valve core, there is a pin and a spring that together allow refrigerant in.

Do AC Schrader valves go bad?

The Schrader valve can become leaky when debris gets stuck in it, or when the rubber o-ring deteriorates. It used to be that to swap out the valve with a new one required removing all the existing refrigerant in the system (pumping it down) first.

Do Schrader valves come in different sizes?

No change in size – it’s an international standard. It’s possible that some Schrader valve stems have a thicker coat of rubber on them and maybe that is what is preventing your pump from going all the way on, but it is not the diameter of the threaded section.

What is the difference between a Presta and Schrader valve?

Schrader valves are wider and typically shorter than Presta valves. They are the valve type that you see on car tires, so they are more universal than Presta. This also allows you to check the air pressure in the tire. Schrader valves are usually found on cheaper mountain, hybrid, and city bikes.

How do I know if my Schrader valve is bad?

Possible faulty Schrader valve

  1. If you put your finger tightly over the valve end does the leak stop.
  2. Over pressure is not the problem, Schrader valves are good for hundreds of PSI (thousands for high spec ones).
  3. If it is not leaking from the valve, check that the valve stem is not damaged.

Can you fix a Schrader valve?

Can A Schrader Valve Be Tightened? You can tighten a Schrader valve gently but firmly, using a Schrader core tool. Just ensure that you tighten it all the way to avoid any air leakage. If you don’t have a Schrader core tool, you can use a screwdriver and pliers.