I want to install a mechanical timer on a hydrant that is connected to a deep well located at my pond to supplement water level in the summer. I purchased an Orbit 62056 programmable timer but I've found that the flow rate is VERY VERY slow. The pond is 1 acre and 16' deep so it needs a substantial flow rate to keep it full. The deep well is rated at 25gpm but the Orbit timer seems to be a whole lot less, maybe 2-3gpm. That does me little good. There is also another hydrant located at the pond's dock house. The deep well that services the hydrants is controlled on it's own dedicated pressure tank and switch. I need a mechanical timer on the hydrant servicing the pond so I can keep the handle open and still be able to run the other hydrant open/closed as needed. An electric timer on the well's electric panel won't work for my needed configuration.

It's my understanding that the government has placed recent restrictions on the maximum amount of water flow a mechanical timer can have. Does anyone know if this is true, and if so what is that max rate? If there is some way to "modify" a mechanical timer to increase it's flow I'll certainly look into that.