Pace Arrow: Pace Arrow Bypass Confusion

[KGflyboy]

My 2019 Pace Arrow has a water bypass valve under the bathroom sink like the one in the picture. When in the normal position everything works as designed, and hot water flows as it should. When I turn it to bypass, no water (or antifreeze) will come out the faucets.

This is a brand new motorhome. I noticed this problem when I winterized in the fall. Is there another valve somewhere I am missing? Is was the valve installed wrong? Is something broken?

2019 Fleetwood Pace Arrow 35E

[KGflyboy]

Quick edit: when I turn it to bypass, water comes out the cold faucets but not the hot faucets. When I winterized I was only able to pump antifreeze thought the cold pipes. I could not pump antifreeze through the hot pipes and had to unhook pipes and pump it through manually to completely winterize the plumbing.

[CathedralCub]

Originally Posted by KGflyboy

Quick edit: when I turn it to bypass, water comes out the cold faucets but not the hot faucets. When I winterized I was only able to pump antifreeze thought the cold pipes. I could not pump antifreeze through the hot pipes and had to unhook pipes and pump it through manually to completely winterize the plumbing.

Does air come out of the hot faucets?

[KGflyboy]

Originally Posted by CathedralCub

Does air come out of the hot faucets?

No. Nothing comes out. In fact, when I tried to bypass the electric water pump and use a manual pump to run antifreeze through the lines, there was string resistance. It was like I was pushing fluid against a brick wall. I tried blowing it out with air and had the same problem.

[paddler1954]

By any chance do you have a Truma "on demand" hot water heater? If so, you just use the low point drains and pull the Truma filter to drain the Truma quart hot water reservoir. Then set the valve to bypass and winterize the cold water side of the system.

[Gary RVRoamer]

That's more like a water heater isolator than a traditional bypass, but I suppose Rev Group could argue that it does indeed "bypass" the heater (no water flows to it or through it). You can still drain the tank and the hot water lines (it has a hot water low point drains, right? Just can't pump antifreeze thru that path. It's a cheaper method than the traditional single-valve bypass that allows cold water to flow around the heater tank and to the hot faucets. All that is needed is a simple shut-off valve on the feeder to the heater. Anybody wanna bet that's what they've done?


According to the Pace brochure, the heater is a typical 6 gallon gas/electric model. Unless you have the Aquahot option. No Truma demand heater.


Oddly, the section in the owner manual on water system and winterizing does not show or even mention the water heater. Nor does the water system diagram.


https://big.nyc3.cdn.digitaloceanspa...20190830092654

[KGflyboy]

Originally Posted by paddler1954

By any chance do you have a Truma "on demand" hot water heater? If so, you just use the low point drains and pull the Truma filter to drain the Truma quart hot water reservoir. Then set the valve to bypass and winterize the cold water side of the system.

I do not have an "on demand" heater.

[KGflyboy]

Originally Posted by Gary RVRoamer

That's more like a water heater isolator than a traditional bypass, but I suppose Rev Group could argue that it does indeed "bypass" the heater (no water flows to it or through it).

Interesting. So REV intended it to work this way? I assumed I was overlooking another valve somewhere or maybe that the water lines weren't hooked up to the bypass valve correctly, but I bet you are correct.

I do have a hot water line low point valve I can open to drain all the water out.

Would you recommend using compressed air to blow out the hot water lines after draining them? My winterization process would look like this:

1. Drain all water from low point valves and from water heater with my bypass valve still in normal position.
2. Close low point valves and water heater drain and use compressed air to blow out the lines.
3. Place bypass valve in bypass position and run antifreeze through the cold lines.

I've always been a little nervous about not running antifreeze through all the lines since I live in the Midwest where it does get fairly cold, so resorting to only draining the hot lines without putting in antifreeze makes me a little uneasy. I'm a newbie compared to most of you though, so I'll probably just do whatever you all recommend.

[moodyerdoc]

We have a 2018 Pace Arrow 35e. Agreed, the manual isn’t much help for the winterizing process. However, I didn’t have much difficulty in putting 4 gallons of antifreeze into the fresh water fill tank then pumping it through both the hot and cold water lines. Blowing out your lines is a totally acceptable winterizing method. Just make sure you do it adequately, recommend 40psi.

[MVS2021]

just saw this. On the 2019 Pace 36U the bypass valve is behind the panel to the left (as you are sitting on it) of the toilet. I was always confused why it had that and the REV valve you showed pictured.

[Pacer]

I have a 2018 pace arrow 38f lxe and I am having issues with hot I have checked all my lines and valves I have gone through everything I can think short of removing my heater I have hot water in my heater but all I get is Luke warm water at all my taps and shower including my outside shower,
Anyone have this issues?

[VIETVET72]

To KGflyboy - I have a 2017 36U and that valves works as you think it should. I turn to bypass and I can drain the hotwater heater and still get cold water or antifreeze thru the hot or cold faucets.

To Pacer - you need to ensure the outside shower valves are off. I had the same problem and though the valves were off. I'd turned them the wrong way and they were full on. Try the shower head with the valves "off?" and see if you get water. With both valves on it's just a mixing point.

[Pacer]

Thanks: I did that I have done everything I can think of and nothing seems to help the only thing I haven’t done yet is pulled out my heater and changed the mixing valve on the heater. But if anyone has any ideas I am all ears thanks again.