I disconnect the 1" hose at the seacock. I customized a length of garden
hose by clamping on a 5/8" - 1" connector at the end. I just shove the 1"
end into the intake hose and clamp it. No messy water spraying anywhere.
Except out of the flow sensor. Yes a double valve T is a good idea, with the
water running out the other side when the engine isn't running. I'd rather
waste a few gallons of water than back up the entire 150' of hose I need. It
consists of every hose and piece of hose I own. I get that Sanford and son
feeling...

"Rod McInnis" wrote in message
...

"Jim and Becky" wrote in message
...
I've got a 350 Mercruiser inboard with a closed cooling system.
We have such high municipal water pressure that the garden hose blew out
the
gasket of my raw water flow sensor.


How did you have the hose connected to the motor?

The "ear muffs" that I use on my outboard and the "fake lake" I use on my
outboard simply leak with any significant pressure.

If your adapter clamps on in such a way that you could develop any
significant pressure then I would recommend making your own pressure
regulator. A very simple way would be to put a Tee right at the clamp
fitting. Attach a length of hose to the third leg of the tee and run it a
few feet above the water pump level. Excess water will flow out the free
end of the hose


Rod