I, too, had trouble with the tank manifold when I got my boat. The pointy end of the valve handle has to be in the proper orientation to select the tank. I still have to look at the almost hidden label to determine which way that is. I think the pointed end is toward the outlet of the manifold to select the tank. It's counterintuitive and I often end up on my knees with a flashlight.
Al Liles SV Elendil C&C 37/40+ Vancouver > On Jul 9, 2018, at 7:43 AM, Josh Muckley via CnC-List <cnc-list@cnc-list.com> > wrote: > > Typically the water pumps are rubber diaphragm style with either one, two, or > three diaphragms. There are often inlet and outlet check values as well. > The checks and diaphragms are rubber flappers that push/pull, seat/unseat > alternately as a drive motor runs. As the rubber gets old and as gunk grows > in the water system the rubber shrinks, hardens, and deforms so that it no > longer seats properly to push/pull water or prevent back flow. One of the > first symptoms is that the pump has difficulty drawing water (dry priming). > Since air is less viscous than water, it leaks past the sealing surfaces. If > the pump is already primed then the more viscous water will create enough > back pressure to seal the seating surfaces. You can then pull water from the > tanks. As long as a relatively uninterrupted supply of water is maintained > the pump will continue to work. Once the tank goes dry there is no more > water to seal the seating surfaces and swapping to the other tank may not be > enough since the pump is no longer creating a suction to prime the pump. > > Propylene glycol and bleach, the 2 chemicals typically added to freshwater > tanks, will degrade rubber components over time. > > Josh Muckley > S/V Sea Hawk > 1989 C&C 37+ > Solomons, MD > >> On Mon, Jul 9, 2018, 9:09 AM Maurice Poulin via CnC-List >> <cnc-list@cnc-list.com> wrote: >> Hello, >> >> As new owners of our C&C 30 mkii, we were out for a first weekend and had a >> ball. Very comfortable and loads of fun on the water was our overall >> appraisal! But we did run into a bit of a snag and I turn to the board for >> assistance hopefully. >> >> The boat has two tanks and we ran out of water on the forward tank pretty >> much on our last evening so switched over to the second tank but never could >> get the pump to prime and draw water from the second tank and charge up the >> lines. Checked all connections and no leaks, plenty of water in the settee >> tank, checked strainer on the pump all okay. Both tank connect to this >> distribution gizmo with assorted ball valves that connects to the pump and >> from there to the galley and head. As the boat is new to me, I suspect I >> may not be working this gizmo thing correctly, not opening up the correct >> valves or maybe closing them while thinking I am opening them. I see on the >> valve handles that one side is pointed while the other side is round, >> possibly indicating on and off? Anyways, confusion and the fear of running >> down the batteries to troubleshoot stopped me from tearing this thing apart! >> I figured I would ask questions before doing exploratory work at the dock! >> What should I be doing appropriately to switch from tanks or can you run >> both tanks together, or not? >> >> Alternately, the pump seemed to be not priming but I thought it was a self >> priming pump perhaps I am mistaken in that, so how do you prime a pump would >> be an alternate question? >> >> Thank you all from this newbie that had a hand pump at the galley previously! >> >> Cheers, >> >> Maurice Poulin >> C&C 30 MKII, Monoloy >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and >> every one is greatly appreciated. If you want to support the list - use >> PayPal to send contribution -- https://www.paypal.me/stumurray >> > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray >
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