Author Topic: Electric dump valves  (Read 3843 times)

Gary Merrifield

  • Guest
Electric dump valves
« on: June 18, 2018, 06:31:40 PM »
Neither of my dump valves will operate with the switch. Do I just replace the valves or can they be rebuilt? The gray water valve does not shut off completely

Frank Bergamo

  • BAC Member
  • *
  • Posts: 275
  • Thanked: 72 times
Re: Electric dump valves
« Reply #1 on: June 18, 2018, 07:52:49 PM »
Gary, the dump valves seem to work better plugged in to shore power, or with motor running. The higher voltage makes them more "lively". If your batteries are marginal, 12.0-12.2 volts, they seem to really struggle to open and close. You may also have bad switches. Check to see if you have continuity thru the switches. If not, switch needs to be replaced. The one that is leaking needs to be replaced eventually. If it were me, I would replace both at the same time because of the difficulty to access them. Hope this helps.
Frank & Paulette Bergamo
2019-       : 2007 Marquis Topaz IV  C-15 600 HP Allison 4000
2014-2019: 2002 Marquis Emerald C-12 505 HP Allison 4000
2004-2014: 1986 Executive Diplomat 3208 250 HP Allison MT-643
Grand Junction, CO.

David T. Richelderfer

  • David, Leslie, Jasper, & JoJo
  • BAC Member
  • *
  • Posts: 1676
  • Thanked: 497 times
  • OSU, Class of 1971, RVing nearly 50 years
Re: Electric dump valves
« Reply #2 on: June 18, 2018, 08:53:44 PM »
I replaced both our electric dump valves in the last year or two.  I was told by the nice lady at the manufacturer in Hollister, CA that their expected life is eight-ish years.  Also, after you hear the valve stop opening or closing, immediately release the toggle switch.  Holding the toggle switch power on will quickly burn up the motor built into the drain valve.

When our black tank valve was on its last leg, it would open the valve about 1/3 and would close fine.  I did not replace both valves at the same time.  I wish I had because within a few months after replacing the black tank valve I was back into that bay to replace the gray tank valve.

http://beaveramb.org/forum/index.php/topic,6459.msg47059.html#msg47059
2004 Beaver Marquis Sapphire

I had a dream... then I lived it!

Gary Merrifield

  • Guest
Re: Electric dump valves
« Reply #3 on: June 18, 2018, 10:35:51 PM »
Who makes the valve
Thanks for the info

Frank Bergamo

  • BAC Member
  • *
  • Posts: 275
  • Thanked: 72 times
Re: Electric dump valves
« Reply #4 on: June 18, 2018, 10:47:34 PM »
Gary, if you click on the link above in David's post, all the info you need will be there.
Frank & Paulette Bergamo
2019-       : 2007 Marquis Topaz IV  C-15 600 HP Allison 4000
2014-2019: 2002 Marquis Emerald C-12 505 HP Allison 4000
2004-2014: 1986 Executive Diplomat 3208 250 HP Allison MT-643
Grand Junction, CO.

Gary Merrifield

  • Guest
Re: Electric dump valves
« Reply #5 on: June 20, 2018, 02:54:03 AM »
Got my dump valves ordered thanks for the help

Keith Moffett

  • BAC Member
  • *
  • Posts: 1118
  • Thanked: 394 times
  • Every day is a blessing!
Re: Electric dump valves
« Reply #6 on: June 20, 2018, 05:02:14 AM »
Frank
The electric valves on our 02 did that especially when cold.  There was a 1 inch vent hole with push in cover at the bottom of the wet bay switch pannel.  If this were removed I could use a long flat tip screw driver and fit it in the slot thus operating the valve manualy.  I did this on each valve and shortly cleaned the tanks with pinesol and calgon beads for lubing the valve doors.  Never had to replace those valves.
2007 Patriot Thunder
45' C-13
2006 Explorer Ltd.
DW is Carol
Safe travels and
May God bless!

Gary Merrifield

  • Guest
Re: Electric dump valves
« Reply #7 on: July 03, 2018, 12:50:15 AM »
Got two new valves and switches and everything works great. Thanks