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Topic: Water Pump Timer Automatically Switches Pump Off (Read 2211 times) previous topic - next topic

Re: Water Pump Timer Automatically Switches Pump Off

Reply #25 –

An inexpensive normally closed 12v solenoid to open the water supply line when you want it and shut off ofter a period of time would be much cheaper.  The on/off valve should be outside the coach to isolate failures.

TEMCo 1/2" NPT Electric Stainless Steel Solenoid Air Water Valve NC 12V DC 5...

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Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Water Pump Timer Automatically Switches Pump Off

Reply #26 –
Neal,

Ah, you probably are quite correct. Never thought of back flow through the pump. Thank you for the tip. And yes, I do use a water timer for fills - just was wondering why the replaced valve didn't do the trick.

Jim

2002 U320 42'
Jim Frerichs
2002 U320 42'

Re: Water Pump Timer Automatically Switches Pump Off

Reply #27 –
To run the pump for a short, set time would it not be cheaper and

much easier to put one of those timed switches like they put on

heat lamps in bathrooms?

Carter-

Re: Water Pump Timer Automatically Switches Pump Off

Reply #28 –
Years ago, when connected to city water pressure, we had a homemade short portable manifold with quick-disconnects on both ends.  The manifold had a Watts house-style pressure regulator and a Home Depot $10 green plastic sprinkler valve, similar to photo.  We kept the manifold inside the bay and turned off the sprinkler valve with a kitchen switch whenever we left the coach.

This is the type of valve where the solenoid only uses a little power to open a small diaphragm hole, which then lets water pressure fully open the diaphragm.  De-powering the solenoid uses water force to seal  the diaphragm and stop the water flow.



Re: Water Pump Timer Automatically Switches Pump Off

Reply #29 –
Carter, the pump latching relay gets shorted to ground to latch or release when you push any of the pump buttons.  When it is latched it powers the pump.  These little timers even with a relay are under $20 and totally passive.  They are going to shut the power to the pump off when the time runs out.  You don't have to do anything, that is the point.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN