Tank drain valves

[30sweeds]

Motor home needs new gate valves.It's located in the camp ground 160 miles from home and I forgot to measure them before I left.Anyway...unit is a 2002 31 ft Coachmen leprecaun.I know the gray and black are 2 different sizes but not sure exactly what size.If anyone knows,I sure would appreciate it. Thanks!

[enblethen]

I am quite sure the black is 3 inch.
Gray water is the questionable one. You might get both a 1 1/2 and a 2 inch. Return the incorrect one.
Maybe someone here knows for sure gray water size and why I asked for your make and model.

[30sweeds]

2002 31 ft Coachmen Leprecaun e450

[enblethen]

Three inch for black
1 1/2 for grey
This is normal sizes but may vary by make and model of rig.
What is your make and model?