Check the valves. Check the valves on the backflow device to make sure they're open. Turn the valve on the horizontal pipe first, then the vertical pipe valve. Low water pressure will result in the sprinkler heads barely shooting water.In extreme cases, many of the heads won't even pop up.Start with the easiest solution.Make sure the valves at the backflow device are fully open.urn the valve on the horizontal pipe first, then the vertical pipe valve. Low water pressure will result in the sprinkler heads barely shooting water. In extreme cases, many of the heads won't even pop up. Start with the easiest solution. Make sure the valves at the backflow device are fully open.
1 Cyanide prevents the cells of the body from using oxygen. 2  When this happens, the cells die. 3  Cyanide is more harmful to the heart and brain than to other organs because the heart and brain use a lot of oxygen. Cyanide gas is less dense than air; so it will rise. 2  Cyanide prevents the cells of the body from using oxygen. 3  When this happens, the cells die. 4  Cyanide is more harmful to the heart and brain than to other organs because the heart and brain use a lot of oxygen.
In small doses, cyanide in the body can be changed into thiocyanate, which is less harmful and is excreted in urine. In the body, cyanide in small amounts can also combine with another chemical to form vitamin B 12, which helps maintain healthy nerve and red blood cells.In large doses, the bodyâs ability to change cyanide into thiocyanate is overwhelmed.Large doses of cyanide prevent cells from using oxygen and eventually these cells die. The heart, respiratory system and central nervous system are most susceptible to cyanide poisoning. Quickly move away from the area where you think you were exposed. 2  If the release was indoors, go outdoors. 3  If you are near a release of cyanide, emergency coordinators may tell you to either evacuate the area or to shelter in place.. 4  To shelter in place means to remain indoors to avoid being exposed to the chemical.