Re: Leaking Gascolator Seal
Posted: Mon Jun 14, 2021 12:05 pm
Reese, 1/8 NPT is a size and thread count. The letters of the acronym NPT stand for National Pipe Taper but the full name is American National Standard Taper Pipe Thread. As is the case for all pipe thread, 1/8th in this case, is the inside diameter of the pipe. The thread count is always the same for a given pipe size, there is no fine or course thread.
I feel pretty confident that your gascolator takes a 1/8" NPT valve. BTW I didn't picture them but valves are also available in !/4" NPT and a few other thread types.
Most people I think, when checking a gascolator, want to push it in for a second and release it and have the valve close. At some point you might also want the valve to stay open without holding it to drain the gas tank and so a locking feature would be in line. The CCA-1550 and the CCA-7450, are the same in this regard, you push straight in and release straight out and it opens and closes. However, if you push in and turn, the valve will open and lock until you turn it to release the lock. The major difference between the two are the 1550 has a stem out each side and the 7450 has a longer single stem out one side, which is used to open the valve. There are advantages and disadvantages to each style and I've cussed at both of them.
The other valves I pictured either have a twisting motion to pull them in (1250) and to lock or they have no lock feature at all (36150). Some of them (9950) have a hole drilled in the body for a lock wire.
I'm sure plenty of 170s have a CCA-1250 installed. I've cussed at these as well. But my personal choice would be either the 1550 or the 7450.
I feel pretty confident that your gascolator takes a 1/8" NPT valve. BTW I didn't picture them but valves are also available in !/4" NPT and a few other thread types.
Most people I think, when checking a gascolator, want to push it in for a second and release it and have the valve close. At some point you might also want the valve to stay open without holding it to drain the gas tank and so a locking feature would be in line. The CCA-1550 and the CCA-7450, are the same in this regard, you push straight in and release straight out and it opens and closes. However, if you push in and turn, the valve will open and lock until you turn it to release the lock. The major difference between the two are the 1550 has a stem out each side and the 7450 has a longer single stem out one side, which is used to open the valve. There are advantages and disadvantages to each style and I've cussed at both of them.
The other valves I pictured either have a twisting motion to pull them in (1250) and to lock or they have no lock feature at all (36150). Some of them (9950) have a hole drilled in the body for a lock wire.
I'm sure plenty of 170s have a CCA-1250 installed. I've cussed at these as well. But my personal choice would be either the 1550 or the 7450.