in the retracted position for a golf course application the upper end of the riser tube will generally be buried under sand fig1 shows such an embodiment of the invention in use to drain a pool formed in a golf course sand bunker having a subsurface drain pipe underlying the bunker because the end of the riser can be buried it can be placed in the lowest part of the bunker this will provide the best drainage because the end of the riser can be elevated above the surface of the sand it can be used without permitting high levels of sand to enter the drain system which can lead to eventual plugging prior art attempts to solve the problem of water accumulating in the bunkers always faced one of these shortcomings devices that are on the surface of the bunker when not in use cannot be placed in the lowest part of the bunker because they are too likely to interfere with the lay of the ball as shown in fig2 and 3 the riser tube telescopes vertically into the drain pipe best results are obtained when the drain pipe is fitted with an upwardly facing collar through which the riser tube closely slides a u201c t u201d fitting mounted on the drain pipe will provide good results and is preferred existing drain pipe can be employed commonly such pipe is plastic corrugated banded pipe referred to in the industry as ads pipe preferably the upper end of the riser tube is fitted with a removable end plug 2 a threaded.