Sniffle Valve Question

[tstrohmayer]

We've discovered at least two different style sniffle valves (drain valves) installed on RG's. The first is a 90 deg fitting that looks like a standard AN fitting but has a checkvalve built in. The second is a straight brass fitting. We think there might be clearance issues with the latter, so we're trying to determine how many aircraft use straight fittings and how many use angle fittings. The parts manual is not a great resource in this example, because most aircraft do not necessarily have the original fitting still installed. Attached it a photo of the angle fitting. Please let us know what type of valve your airplane has.