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Water Pumps
Something interesting I learned at Marathon is that they are installing all 12V water pumps in their coaches now. They put in two 12V water pumps and have much less problems than the one 110v Water Pump combined with a 12v water pump.
Leon said they have retrofitted older coaches to two 12V water pumps as well (not cheap). The only reason he gave why Marathon has done this is that they have less problems. He didn’t elaborate.
Just wondering if anyone has done this since it would involve rewiring the plumbing bay to all 12V and replumbing to two SureFlow 12v water pumps.
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33 Replies
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Tim,
Shurflo makes 120v pumps.
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You’re better at spelling than me 🙂
Yes … but I was interested that Marathon changed to all 12V water pumps instead of using the 110V water pumps.
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I will keep my 110v water pump thank you! My experience with 12v pumps is not stellar. If ordering a new bus, I would request a 110v and a 12v for travel mode. Just like i have today.
Not sure what problems Leon speaks of for 110v pumps.
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I’m not sure there is any best way to equip a coach with water pumps because the choice depends on several considerations.Voltage is not necessarily one of the considerations because most coaches have multiple options for pump power, including 12 and 24 VDC or 120 VAC.
What I want is back up. I want a system that will function with a back up pump so if the primary pump fails I have one to take over until I can repair or replace the primary pump at my convenience.
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My first Prevost was a 97 Marathon XL and it had dual 12v volt pumps. What I liked best about that setup, there were warning lights on the lower dash panel that lit up if the pumps where running while driving. That was a great feature in the event you had a water leak while driving.
I would not replace my current Headhunter Mach 5, you can’t beat the home like pressures no matter how many water sources are turned on.
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The problem Leon was talking about is owners should turn off their 110v water pumps when traveling and use their 12v water pumps. Something about leaks occurring while traveling if you use your 110v water pump.
I didn’t ask, nor did he explain, why a 110v water pump may leak while traveling down the road & a 12v water pump would not. But I will follow up with him Friday cuz I have not been using my 12v pump when I travel down the road.
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Your last paragraph says it all Tim. I have the Headhunter and a small Shurflo as back up. Both provide the same system pressure, but the only difference is the amount of flow. Until I see a wet spot I have no indication my water system is leaking.
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When it became a standard feature on a Marathon I don’t know but mine switch automatically.
When on shore power the 120v is on and when driving the 12v is on. You can manually shut off either one in the closet for storage.
Later
bv
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Bernie,
On mine, I would have to manually turn on/off my 12v in my Water Bay where my water pumps are located. I can turn on/off my 110v water pump from inside my coach or in the water bay where I hook-up my hose. But this does not happen automatically.
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Mine doesn’t have a 12v, Headhunter only.
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We have both 110v and 12v water pumps. We only use the 12v when we’re not on shore power. But we always turn off both pumps when we leave the coach unoccupied for any amount of time and while we’re driving.
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Interesting. I found our Grundfos 110v sick last week. When checking it appears to be locked up. Checked everything I know too but still doesn’t work. It’s at least 12 years old so decided to replace. Yes, it does cost more than an additional 12v pump but in the big scheme of things it’s less than most repair/replace costs for coach.
Found a new one locally and will replace within a few weeks. The 12v still works and I carry a 12v replacement just in case. The ShurFlo doesn’t cost much and is easy to replace.
I will take the old 110v apart and keep any pieces that may be used at a later date.
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JD,
My water pump is “original” to the coach. I checked the serial # time frame … but it still runs great. No doubt an update I’ll do in the future.
If possible, Post pics when you replace yours, since I’d be interested in the steps you take. Better yet, take a video of yourself and post on the video thread.
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Mine only has a 110 volt. No 12 volt. The button for 12 volt is there… but no pump. Why is there such a variance within Marathons? -
My also only has the 110 volt Grundfos and no 12 volt. It started acting up before our trip out West and would not shut off. I ordered a new one and installed it in about 20 minutes, very easy replacement. I am going to order the rebuild kit for the old pump and will rebuild it, watched a video on YouTube which looks like a easy rebuild, which will give me a spare.
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