Doug, you may have nothing wrong with your system. If the pump breaker is on, and you're connected to shore water, when you open a faucet the pressure in your system drops, which causes the pump to run. If you want to leave the breaker on, you could install a check valve on the output of the pump which would prevent it from sensing shore water pressure. Turning the breaker off sounds simpler to me.
Also (speaking as a retired marine surveyor), when you're connected to shore water, please please please remember to turn off the faucet on the dock every time you leave the boat! If the diaphragm in the boat's pressure regulator fails, shore water will sink your boat in a hurry. On Wed, Jan 10, 2018 at 8:16 AM, Doug Thomas <[email protected]> wrote: > Frank, > > > > Thanks for the response. It sounds like the same system my Hatteras friend > has and explained to me. So I assume my pressure sensor is faulty or set > above shore water pressure. So, I’m back to where I’ve always been; turning > off the pump when shore water is connected and turning it off when > disconnected. > > > > *From:* 'Frank Spor' via UnifliteWorld [mailto:unifliteworld@ > googlegroups.com] > *Sent:* Wednesday, January 10, 2018 9:11 AM > *To:* [email protected] > *Subject:* Re: [UnifliteWorld] water system > > > > Doug, I'm not an expert here, but I own the 46'. > The internal pump has a pressure switch in it or with it to shut the pump > off when the set pressure is reached. Usually the dock pressure exceeds > that pressure, so the pump would normally not run when dock water is hooked > up. I leave mine turned off when hooked up to the dock. There is a check > valve where you hook up the dock water to keep from pumping internal water > backwards into the dock system. Originally my old pump had an expansion > tank and an external pressure switch. The new pumps don't need expansion > tanks and the switch is internal. Hope that helps. frank > > > > On Tuesday, January 9, 2018, 7:32:25 PM EST, Doug Thomas < > [email protected]> wrote: > > > > > > I have a question concerning the water systems on a 46’ Uniflite. It has > to do with switching between internal water tanks and external dock water. > I was told by a Hatteras owner that he has a pressure sensor that > determines if the boat is hooked up to shore water or not. If so, the fresh > water pump does not operate unless the shore water pressure drops > excessively. I question whether this is the way the Uniflite works. When I > have the pump turned on, even with shore water connected, when I open a > faucet, the pump runs. The shore water pressure seems to be fine. So, how > does the Uniflite system switch between internal water tanks and external > shore water? > > > > Doug > > -- > You received this message because you are subscribed to the Google Groups > "UnifliteWorld" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/unifliteworld. > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "UnifliteWorld" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/unifliteworld. > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "UnifliteWorld" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/unifliteworld. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/unifliteworld. For more options, visit https://groups.google.com/d/optout.
