If the set-up is already in your boat
, then use it. As previous posters have said, usea bucket as near as possible to the same level as the raw water
intake (so that 1. the engine pump
is doing "roughly" the same work
, 2. you're not over- pressuring the system using mains pressure). it'll take a few minutes adjustment of the mains tap to keep the bucket topped to the correct level (that is, quantity of water in = water out: if it's too low, you will empty the bucket, and eventually the pump
will run dry, engine overheat etc; if it's too high, you fill the bilge
with fresh water). I flush mine once/twice a season. In the winter time, it's a good way of getting some antifreeze/inhibitor into the engine. But, of course, many people just don't bother at all.