I have a sprinkler well thats 15 years old. Lasr season it would not prime. I stuck a hose down and flush. The well worked fine until the end of the season then it started to clog again. Am thinking od putting in a new well. It is 25' deep in sand. Do I need to spend the money on adrive point like a sand blocker from Dean Bennett supply or a regualer drive point fine in sand. The I just read about NU-Well. should I try that or just put in new. The is at a wummer house the I rent out for the season so I am not there to check the well all the time. Who hase good well point to buy? Thanks