iV Cap 



I ^ Plastic 

 extension 



J Plastic shaft 



'^m 



m 



Turning stop 



16 holes 

 .2" size 



Set screw for 

 "f holding point 



Key Seat /tifT^jl^ -Turning slot 



16 holes 



211 

 size 



Sleeve 



Foot 



^ Key for opening 

 and closing valve 



Extension 



b=^ 





W-- 



Union 



Shaft 



Sleeve 



J 



=: Foot 



Figure 1. — A plastic standpipe for Sampling water seeping through stream gravel. 



