Help! I can't figure out what's wrong. I have a 26 gallon spray tank, powered by a 12v battery. One of these: http://www.northerntool.com/webapp/w...mp;R=200240124 It's worked just fine in the past. But a couple of days ago it stopped working. The pump ran, but I was able to use the sprayer for only about ten seconds before the stream became a drizzle. So it seems I'm losing pressure somewhere. I checked the connections, nothing seemed loose, and even replaced the small tubes from the tank to the pump and from the pump to the sprayer. I also blew air through various connections, in case there was a clog. No luck. Any ideas?

Thanks in advance.