Had to use a little of it today. Site (now used as home schooling HQ instead of elementary school) reported that front grass area was dying even though system controller was turned on almost seven weeks ago. Found that the PVB was still turned off... oversite from getting shut down in January for freeze protection by district plumbers and not being turned back on by them. System sat and ran dry for so long that rust (pump water) had hardened on diaphrams of valves. One wouldn't shut off, one only partially opened showing classic "lack of pressure" symptoms and two just plain pizzed me off so they all (five total) got replaced. Spray pop-ups in one area were way too deep because of tree duff, leaves and gopher dirt so new 6" ones were put in. Old Champion brass pop-ups were clogged/turned so out they went too. Even the system sequencing pizzed me off so I rewired the seven zones the way I want them and will just update the site zone map. Controller (MC-Plus-A) is pizzing me off too so it's now on my hit list when we get a break in our work orders.