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Old 12-06-2014, 20:23   #1
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HVAC Raw Water Hose

Anyone see a downside to using a high quality garden hose to carry raw water to run the HVAC condenser?
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Old 12-06-2014, 20:35   #2
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Re: HVAC Raw Water Hose

Other than sinking your boat, nope. It will be below the water line. Only use hose rated for below the water line.

Trident Marine: More About Hose
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Old 12-06-2014, 21:27   #3
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Re: HVAC Raw Water Hose

Quote:
Originally Posted by PaulM View Post
Anyone see a downside to using a high quality garden hose to carry raw water to run the HVAC condenser?
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.

C
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Old 22-06-2014, 07:32   #4
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Re: HVAC Raw Water Hose

Thanks guy's for the reality check.
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