Water pump runs when not in use

Actually some of the plumbing is original KZ stuff. KZ might use PEX clamps on water hose, and even put water hose on a PEX barb, but that is incorrect. Yes, I have repaired a number of these ridiculous connections. Use hose barb fittings for water hose and PEX barb fittings for PEX pipe. Use ordinary hose clamps on hose and compression PEX rings on PEX pipe.

Note that PEX barbs are smaller in diameter and have smooth barbs and hose barbs have sharper edges to hold soft hose material.

PEX Fittings

Hose Barb

That's exactly the issue, the T to the right in your picture has both PEX & Hose on it, that hose connection leaks.  Guess the gear clamps going to be the only fix as the 1/2 PEX does not fit over the hose.  The next would be to find a T with PEX & Hose, doubtful there is one.

Thanks lynnmor, I'll see if I can get that clamp.

OK, just got off phone with C/S and they said they are factory tested with water. So all is good.

This is a basin wrench, makes replacing a faucet much easier. 

Good idea on the valves, easy to install while your'e already under there.  

Hey all, as OP on this thread, I just wanted to come back and update the out come.

I went ahead and purchased: www.amazon.com/gp/product/B002XM5G70/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 and installed it last fall. The install was simple even given the limited work area. I used it one or two outings last fall and twice so far this spring and it is working great for me. It only cycles when water is actively being used and doesn't come on between uses. It is also much quieter than the old factory pump and it seems to run easier when it does come on.

Thanks to everyone for all the help and advice, I now have a trouble free water pump. I have wondered what to do with the old pump. I didn't want to just chuck it and I don't really care to try to fix the diaphram which is the most likely problem. So, what I have come up with is that I will mount it to a board and use it to siphon water from a portable water tank into my fresh water tank on the camper. I have had to manually siphon water before and it is hard to do and time consuming using gravity.

I removed the check valve in the city water port and added an inline check valve inside. Between the new check valve and the city water port I added a tee and connected the winterizing hose to it. Now I can pull water into the city water port and direct it the tank or right into the water system. The benefits are that no additional pump is needed, no custom water hoses, the winterizing hose stays sanitary and no wiring or switches are needed. I did post this modification earlier.

I would disassemble the old pump and fix it for a spare, it may only be dirt and the fix may cost nothing.

Remove hose from inlet.
Punch out check valve.
Cut hose twice.
Insert check valve.
Insert tee.
Tighten six hose clamps.