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Old 03-03-2006, 06:47 AM   #15
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The bypass kit comes with the brass fittings that screw into the water heater. One is actually the valve, the other is the backflow preventer. They also supply a plastic screw fitting that goes to the backflow preventer. The PEX swivel fitting screws onto that.
Rob
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Old 03-07-2006, 07:49 PM   #16
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Quote:
Originally Posted by Robfike
I just finished installing the new water heater. The biggest problem was getting the new unit through the hole in the side of the coach.
THE PLUMBING: As I was able to get a lot of great help from everyone on the forum, I was able to at least ask the right questions to find parts. I elected to go with the PEX white tubing and only crimp type fittings with one exception. The fittings are copper as well as the crimp rings. I was able to find the crimp fittings that are for Poly on one end and PEX on the other. These I used to go from the old stuff to the new. I used the new by-pass kit from Camping world. The only fittings that are not 100% crimped are the ones that connect the PEX to the by-pass fittings. These are a swivel type screw-on fitting.
You should be able to see in the photos how it all is put together.
This really is not a big deal. I did pop for the crimping tool at $97.00. I think it will be handy when I need to replace something else.
I had to go to Lowes, and Menard's to get all the tubing and fittings that I needed.
In the last photo, you can see the "go..no-go" guage that comes with the crimper. You should check each crimp. The other item in the photo is a tubing cutter. I got this at Lowes and it works great.
I can't wait until Spring!
Am I looking at a heat exchanger system with those black rubber hoses? If so, where did you find a new water heater with that? I was under the impression they weren't made anymore. I sure haven't seen any at places like Camping World.

Great pictures.
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Old 03-07-2006, 08:48 PM   #17
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heat exchanger type water heater

Tim,

I just replaced the tank on a heat exchanger/120VAC water heater on an older Safari MoHo last month. They are still made by a company in CA....mostly for the marine industry. I'll check my notes to get the name of the company.

The unit had an aluminum tube running thru the bottom of the tank so that the engine coolant would heat your water for free while the engine was running. It also works in reverse to pre-heat your engine while the 120VAC is heating your water.
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Old 03-07-2006, 09:14 PM   #18
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Tim,

I just replaced the tank on a heat exchanger/120VAC water heater on an older Safari MoHo last month. They are still made by a company in CA....mostly for the marine industry. I'll check my notes to get the name of the company.

The unit had an aluminum tube running thru the bottom of the tank so that the engine coolant would heat your water for free while the engine was running. It also works in reverse to pre-heat your engine while the 120VAC is heating your water.
Lew,

My MoHo came originally with the heat exchanger type water heater, but by the time I got it the heater had been replaced with a gas-only unit. I just recently replaced all the hot water lines on the coach, and eliminated the tees for the original lines going to the factory water heater. They had been plugged when the heater was replaced, and I didn't want an unnecessary source for a potential leak. It appears that Robfike has located a new heater with that original setup. I'd appreciate your posting or sending the name of the company that still makes the tanks if you come across it. I wouldn't replace the gas heater just to get the exchange type back, but I would consider going back to that when the time comes to replace the gas unit. I've also had good success with the "Hot Rod" add-on electric elements that screw into the drain in the tanks. Saves lots of propane, and does very well providing hot water. Of course they make gas/electric heaters, but I already have a good propane-only one, so that's what I've got to deal with at the present.

Thanks,
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Old 03-07-2006, 10:01 PM   #19
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Tim,

If I remember correctly, I have a mildly used tank from this type of water heater. The owner wanted it replaced with a conventional unit. I will check at my shop and let you know. If you want it, I will pressure test it first, then let you know the final condition. IIRC, it was oK when I removed it; just the components were N/G.
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Old 03-08-2006, 07:40 AM   #20
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Guys,
I purchased my new water heater from PPLMotorhomes.com They are in Houston, TX but my water heater came drop-shipped from Elkhart, IN.
They sell used motorhomes and parts. Their price was the best I could find. My original heater was a gas unit with the heat exchanger. The one I got from them is a gas/electric with heat exchanger. Since they buy so many of them, it was cheaper than the one with just gas/exchanger. I just did not use the electric element. They seem to be good guys to deal with.
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Old 03-08-2006, 09:30 AM   #21
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Originally Posted by Robfike
Guys,
I purchased my new water heater from PPLMotorhomes.com They are in Houston, TX but my water heater came drop-shipped from Elkhart, IN.
They sell used motorhomes and parts. Their price was the best I could find. My original heater was a gas unit with the heat exchanger. The one I got from them is a gas/electric with heat exchanger. Since they buy so many of them, it was cheaper than the one with just gas/exchanger. I just did not use the electric element. They seem to be good guys to deal with.
Rob
Rob,

Thanks for the info. I don't need a replacement now, but I'll make note of this place. I'm assuming from what you're saying is that the unit you got is used? If so, that at least agrees with what I had been able to discover, i.e. they don't make new ones anymore, with the probable exception of marine applications. I really like the idea of the gas/electric/with heat exchanger. The perfect combo, IMHO . Thanks again for all the info., and the great pics. Quite a help when I need to do this.

Best,
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Old 03-08-2006, 12:55 PM   #22
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The unit I put in ia a NEW unit. It is their part number 80-1364. Their price is $499.00 It is an Atwood 6gal Gas/Electric/Heat exchanger, with automatic ignition for gas operation. My original unit was an Atwood as well.
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Old 03-08-2006, 01:46 PM   #23
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Quote:
Originally Posted by Robfike
The unit I put in ia a NEW unit. It is their part number 80-1364. Their price is $499.00 It is an Atwood 6gal Gas/Electric/Heat exchanger, with automatic ignition for gas operation. My original unit was an Atwood as well.
Thanks! I had no idea they were still available, and especially with the electric element. I'm filing this info. for the inevitable time mine goes, and I'll have to replace it. My only debate is whether I'll travel enough to need the heat exchanger feature, but I can't deny it's the only "free" hot water I can get without going to solar. Since I've replaced the hot water lines on past the location of the water heater to the auxiliary coach heater anyway, I may as well get the exchanger like you did. Just curious, but is there a reason you didn't hook up the electric? I've always found that to be a very economical feature since I'm usually paying for electricity anyway.
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Old 03-08-2006, 02:03 PM   #24
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Quote:
Originally Posted by Robfike
I just finished installing the new water heater. The biggest problem was getting the new unit through the hole in the side of the coach.
Rob,

Was the problem because the new unit had different dimensions than your other one?
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Old 03-08-2006, 02:36 PM   #25
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I did'nt hook up the electric just because I'm lazy. My coach did not come with electric, so I would have to run power to it.
The new heater is really the same size as the old one. The old one had a cardboard cover, while the new one has a styrofoam cover. The sharp metal just sort of messed up the exterior of the soft styrofoam.
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