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Old 11-26-2022, 10:31 AM   #1
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sureflo water pump start when not in use

This our 3 rd sureflo 4008 we installed on our redhawk 2017 . the pump starts when not in use even after replacing the pump. the 2nd one died completely only after 8 months. we checked for leaks. no leaks. now we turn in off at night. it just goes on and off for a second and it’s very annoying. any suggestions?
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Old 11-26-2022, 10:59 AM   #2
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I only turn my pump on when I need water.
Never hook up to campground systems except to fill the tank.
Put in an accumulator to stop the pulsing.
Dumped the Shurflow brand for a better one, and saved a lot of $$$$.
See......

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Old 11-26-2022, 11:08 AM   #3
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As I understand the pump turns on when it looses pressure. There is a possibility that you have a small leak somewhere that you cannot access, such as a crimp connection. It doesn’t take a lot of pressure loss to cycle the pump. Another explanation would be if you have an ice maker the pump would run after it cycles.

Keep looking.
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Old 11-26-2022, 11:32 AM   #4
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Quote:
Originally Posted by AlanTerry View Post
As I understand the pump turns on when it looses pressure. There is a possibility that you have a small leak somewhere that you cannot access, such as a crimp connection. It doesn’t take a lot of pressure loss to cycle the pump. Another explanation would be if you have an ice maker the pump would run after it cycles.

Keep looking.

Exactly^^^^^

Pump short cycling means a LEAK.......minor one but a Leak
One possibility would be pump internal check valve but you are on 3rd pump and still short cycling

So you have a LEAK....
Could be at a fitting, could be Fill Valve to fresh water tank, could be City Water Inlet check valve, could be water heater T&P Relief Valve, could be low point drains etc
But you have a Leak
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Old 11-28-2022, 11:58 AM   #5
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Quote:
Originally Posted by Old-Biscuit View Post


So you have a LEAK....
Could be at a fitting, could be Fill Valve to fresh water tank, could be City Water Inlet check valve, could be water heater T&P Relief Valve, could be low point drains etc
But you have a Leak
If it is the fill valve to the fresh water tank, you will probably not see any evidence of the leak. A small amount of water can leak into the fresh water tank, not on the ground. If that is it, it will eventually get worse. It happened to me. That kind of leak will also slowly fill the fresh water tank when you are running on city water. (Obviously not very fast! But eventually....)
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Old 11-29-2022, 07:40 AM   #6
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when we are connected to the city water the fresh water tank overflow so we fill the fresh water tank and use the pump. we are stationary for 6 month so we have to fill the tank often. we turn the pump off at night so we can sleep.
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Old 11-29-2022, 11:20 AM   #7
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That certainly points to the fill valve leaking into the fresh water tank. You will find threads on here about replacing the valve. It is pretty easy to do, especially if you just replace the inner parts of the valve, and not try to remove the valve itself from the PEX tubing.

Edit:

Oops, I didn't notice this isn't an Alpine Coach. I have no idea about your valve system. YMMV.
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Old 11-30-2022, 04:43 PM   #8
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on city water= leak from overflow

we can’t find any leaks and our water pump keep cycling when not in use. never found the problem and we re on our 3rd pump. since we are stationary for the winter in Fl we re connected to city water but it’s leaking from the overflow. Any idea what’ i’m doing wrong?
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Old 11-30-2022, 04:56 PM   #9
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Sounds like tank fill vavle leaking or not closed completely it tank is overfilling / overflowing.
Why run pump when connected yo city water? Cycling may be leaking pump check valve? Or it's the tank fill leak affecting Press & causing pump to cycle.
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Old 11-30-2022, 08:43 PM   #10
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Winemaker2 covered the typical issues.
I'll just add that when I had this issue, it took a while to get a replacement valve so my temporary fix was to install a shutoff valve to the fresh water tank.
This will let you use city water as normal until you get this fixed.
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Old 11-30-2022, 09:47 PM   #11
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Either the fill valve is leaking or not closed or the check valve in the water pump is leaking. Ther is no reason to run the water pump when on city water. Are yo sure you have the valves set up properly for the RV?

It would help if you added a signature to your USERCP with the year, make and model of the RV.

Ken
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Old 12-01-2022, 07:23 AM   #12
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thanks!! where is that tank fill. valve?
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Old 12-01-2022, 12:18 PM   #13
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Originally Posted by colettek View Post
thanks!! where is that tank fill. valve?
Usually they are right in the wet bay on a panel where you connect city water.
It selects whether city water is used to fill tank or supply MH.
If still not sure post a pic or 2 of your wet bay controls.
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Old 12-01-2022, 01:50 PM   #14
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Originally Posted by colettek View Post
we can’t find any leaks and our water pump keep cycling when not in use. never found the problem and we re on our 3rd pump. since we are stationary for the winter in Fl we re connected to city water but it’s leaking from the overflow. Any idea what’ i’m doing wrong?
we have a 2017 jayco redhawk 29xk
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