I just changed my hoses, as the one from the pump to the rear AC was near completely blocked with barnacles
. Yes, I have a strainer, and I had flushed it several times - each time it got worse. All I can assume is that during winter, sea water
had baby barnacles
in and they grew. Anyway, the hose I removed was imprinted with:
"MPI AirCON PVC 125 psi WP 163-0580 5/8" USA"
I went to West marine and was going to buy their 5/8 water
hose, but they were out ($5 something per foot), so went to Lowes and purchased their reinforced PVC at $1.70 per foot. I think its rated at 165psi, has a thicker wall than the PVC AIRCON and is reinforced. The AIRCON product is a thin rubber pipe coated with PVC, and the Lowes product is thicker, reinforced, and has a higher pressure rating. Since in my application it will not be exposed to sunlight, I am sure it will be fine.
As an aside, I have re-plumbed mine with a couple of valves so I can easily flush with fresh water when the units are going to be layed up for a while