My permagreen magnum will not spray. I checked the relief valve. It is not working. I am not sure why if it is not working why pressure won't go to the nozzles. I get some output but not much, a narrow pattern. I checked the inflow screen it is clear. There is flow into and out of the pump. IF I take the relief valve off I get good flow out of that hose. Any thoughts would be appreciated. I will be calling Permagreen Monday morning. It stopped Saturday morning with a full day planned. Has anybody had a pump stop working. Is it a good idea to keep one on hand. I keep belts on hand. I like the machine, but it has these little breakdowns. I had my pull cord break. I have 240 hours on the machine. I bought it this spring. Was wondering what else might go wrong as the hours increase. I am thinking of getting a second one as a backup. I can't afford the down time.