Washdown Pump Plumbing

[CarVermont]

My 2003 366 deck wash down pump (fresh water, not seawater) inlet is NOT plumbed to anything. The freshwater tank has a single output to the fresh water pump for sinks etc. That plumbing appears to be factory.

I can't figure out where the deck wash down pump should connect. There are no "T fittings" that I can see off the tank.

Anyone know?

[tomschauer]

It sounds like someone disconnected it somewhere along the line, or it was seawater and was connected to a thru hull. You can cut a Tee into the line leaving the freshwater tank, before the existing water pump. If you run both pumps at the same time, you may see reduced flow from one or both pumps.

[Viper]

If it's a potable (water used from tank) water outlet, you can bypass the wash-down pump by just teeing into anywhere along the cold water line after your existing fresh water pump, anywhere after the pump, anywhere in the boat will do. You'll only get the amount of pressure that your fresh water pump is rated for. If you want more pressure than that, simply hook the boat up to dockside water, that will likely pressurize your system better, or as mentioned, tee the wash-down pump into the tank's current outlet line though flow will be reduced with both pumps running as noted above.

Personally I wouldn't be using water from the on-board tank for wash-down. In a salt water app, I'd just hook up to a thru-hull to get things started, then do a final rinse with fresh water when I returned to the dock and can hook up to dockside water.

What would you be washing down that couldn't be done first with salt water (I assume that's what you're in) then do a final rinse at the dock?

[CarVermont]

I'm in fresh water. I found that there were 2 options for the washdown pump.

1- Its own seacock in the aft bildge. 2- Plumbed to freshwater tank.

Since I don't have the above mentioned seacock/thruhull, I have to assume it originally went the the tank.

I don't plan to use it much at all. I just don't like having things in disrepair is all.

[Viper]

If there is no unused seacock, plumb it into the water tank's outlet hose as described above.