Originally Posted by PaulM
Anyone see a downside to using a high quality garden hose to carry raw water
to run the HVAC
I do. This hose will be below the waterline and can be subject to vacuum if there is a partial or total blockage upstream of the pump. Garden hose is not good for either requirement.
The good folks at Trident have a bit of self interest in making those same points so they took the time to write the same thing in more detail:
"Raw Water "Pick up" Intake-These hoses are connected to a hole in the boat hull
below the water line (preferably via a good sea cock which should be routinely inspected, tested and secured when the boat is not in operation). It delivers raw (outside) water for the engine cooling
, sanitation, air conditioning
and live well systems. Use only hose recommended for "below water line" connections and preferably one constructed with a hard spiral helix to prevent kinking and collapse under suction if the raw-water screen
becomes clogged. Because a breach in the hose can flood or sink your boat, we recommend using the best hose possible. The heavy wall rubber raw water pick-up hose with 2 ply and wire helix reinforcement (essentially a small, heavy wall exhaust
hose-our series #100 and #250) is the best. XHD smooth vinyl hose with a hard PVC helix like our #148 white sanitation hose or our #147 series may also be used except where heat is a factor."
I have already spent as much time fixing hoses while at sea as I plan to do in my lifetime. Your mileage may vary of course.