I am looking for some electric solenoid valves to be used as header water dump valves. Has anyone ever used something like this? If so, what is your source for the valves?

Any feedback- positive or negative is appreciated.

Gonna be hard to find. Most high-flow fluid solenoids are pressure-shuttled, either by water pressure or air pressure. You do not have adequate line pressure in the boat to shift the valve, and unless you put a compressor and storage tank in it, air pressure isnt an option either. You will need motor-operated Y valves, and they aren't considered to be very responsive.

What is the application? Will spring popoff valves work for what you want?

Blown Formula, I did a drain using a water pump that was normally closed and open when the pump was turned on. I believe it was out of a previous boat water water system where it would keep the pressure up to a certain point and then shut down. I tee'd the lines into the pump and overboard. When I shut the motors down I turned on the pump and drained the pipes.

This is to drain the water out of the headers so it does not stand in the headers on the lift or trailer. I want an automatic type dump system.

I've had solenoid control fuel selector valves. I'm not sure if they're made to handle much pressure though. Would that work?

You don't need valves.

Just connect 1/4" hoses to the water manifolds,
a Y-pipe and dump it thru the transom.

It will drain it self in one minute after you shut the engines down.

PS. Put the waterdumps on the transom as low as possible.

38KV-....
That sounds interesting.... could/would that cause the water level (at rest/anchored) to rise to the level of the surrounding water and possibly cause hydraulicing when restarting engines?? I really like the idea of no valves plus it could eliminate a possible over pressure problem with offshore pickups & Merc racing pumps.
Has anyone tried this??? Did you (38KV) do this??

What I ment was as low as possible but still above sea water level.

Most engine applications do have the header water manifolds
over the sea water level,and a 1" fall is enough
for the system to drain itself.

The water level in the headers can't exceed the sea water level
unless engines running.

We don't trailer our boats so much here in Sweden,
so one of the reasons I'm using this system is to
prevent hydraulicing in case of internal header leaks

I've been using it for 3 years,it works perfekt!!!

Cheap,easy,reliable.

Good luck!

Jonas.

Excellent!!
Thanks..

Question

What keeps the water from flowing out the 1/4" drain lines when the engine is running? How do you shut it off? I assume you would put the drain lines on the line that goes to the #7 & 8 cylinders?