Hot Water Heater Bypass Valves

Been reading the replies, got her fixed this morning. I went to Home Depot got a Pex Straight Valve, 1/2 inch on both ends, clamps, bought a clamper...more blue pex pipe than I needed and installed it. No leaks...I filled up the hot water heater, from my fresh water tank and checked it. I put water to the system from my water hose...everything works. I now have a Pex Cutter, Clamps and Clamper, plus 4 feet of blue pex pipe, just waiting to be reused. I might add, when I cut the old valve loose, I used my Dreml to cut the clamps and part of the pipe..being careful not to get into the other plastic fittings. My old valve was leaking from the bottom...had a rubber seal that protruded out. I am glad that I noticed it now...than later. Total cost: 77 $$ with my military discount.