Guy said he had a hydraulic system. Spent 2500 last year with another company and they didn't get him going again. 40 year old at least all copper system. Left the water shut off all winter so the piston diaphragms dried out. I told him you'd be better just getting a new system but he lives in a tear down house and is just trying to spend as little as possible. Will spend more fixing this thing in the long run. Anyway we had to work this piston a few times to finally get it to shut off after it came on.