I would like to get away from sloshing the anchor chain with buckets of water to clean the mud off when raising the anchor.   So, I'm looking to install a washdown pump system. 

I'm trying to figure out what size pump would be best.  I'm intending to supply the pump with water from a 1" hose (can be easily reduced in size), which is Teed to an existing seacock.  I'm on a 50'/15m schooner, and am cleaning up to 90m (300') of 7/16" (12mm) chain.  Since the engine is running whenever I'm retrieving the anchor, I'm not concerned about power consumption. 

I'm looking for advice from those who have a washdown pump system who are happy with using it for cleaning the anchor chain.  Specifically, I'd like to know: 
* what the flow rate and pressure of your pump is, or else the pump model
* if you're able to clean the chain as fast as it comes in, or if you often need to stop retrieving to fully wash the mud off

Thanks!