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Old 10-10-2016, 01:51 PM   #1
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Winterizing Coachmen Mirada

We bought a 2015 Coachmen Mirada 35KB earlier this year. This is my first time storing it. There is no procedure in the OM for getting RV antifreeze into the pressure system on this unit. There is no hose fill high up on the side, just a "strainer" hose connection(low in the plumbing compartment). Is there an antifreeze draw line? Or do I have to make my own pump system to pump it in. Have owned 6 units previously that you could either pour the antifreeze in or draw it out of a jug. Does not appear you can do either on this rig.
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Old 10-10-2016, 03:18 PM   #2
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Your going to get a dozen ways to winterize your rig.
I take the easy/lazy way.
Buy 8 gallon jugs of rv antifreeze.
Drain my water heater and fresh water tank, and drain my low point cold and hot lines, and close all the valves. Remove anode rod and use a pipe plug to seal hole.
A gallon of antifreeze goes in the black tank. 4-5 gallons go into the fresh water tank. I run my pump and open the faucets until antifreeze comes out of all of them, hot and cold, running a gallon or so into the gray tank. Outside shower also. Run till all faucets are running antifreeze into the lines and traps. Put a quart of antifreeze in the pottie along with a cup of pure mineral oil for the seal.
Shut down pump and put her away till March.
Come spring, drain, run fresh water thru everything till it's clear, sanitize fresh water tank, and go.
Steve & Cheryl + Zoey, and Ziggy, our furry kids.
2012 Forrest River Lexington 283ts
2013 Subaru Crosstrek toad
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Old 10-10-2016, 05:57 PM   #3
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Yeah. That's how I normally would do it. This is the first RV I've owned that there is no place to dump antifreeze in. You screw a garden hose on the water fill inlet and use tap water pressure to fill.(in line check valve I assume as filler is lower than tank.) I'm going to see if I can remove the draw line from the pump and fashion a draw line for that. Other RV's I owned previously allowed you to do this by flipping valves. I feel like it should get easier as you buy newer. Not more difficult!
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Old 10-11-2016, 08:30 PM   #4
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Our Mirada has a siphon hose and an inline connection point by the pump in the wet bay. I run the pump and jugs and DW runs the taps. However we first blow out all of the water with pressurized air. We drive 15 miles with the FW tank valves open draining that part. Don't forget to blow out your black tank flushers too.

Taking in the sights with our Trolley ...but life is always better under a Palm Tree

2016 Coachmen Mirada 35 BH. - our Trolley
2015 Jeep Cherokee Latitude

Western New York
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Old 10-11-2016, 08:44 PM   #5
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I can't say for your Mirada but with out Four Winds there is a valve and T between the pump in water tank. The valve cuts off the water at the tank. The T has a foot of hose with a 1/2 inch pipe fitting and plug. I close the valve to the tank, remove the plug and add another few feet of vinyl hose with a fitting so I can use it as a suction line to a jug of antifreeze. That lets me fill the system without putting much in the fresh tank. If you do not have something like that it would be easy to add if you have access to the tank and/or pump. Leave the valve open while in storage to let the water drain back to the tank and or get a bit of antifreeze from the pump side into the valve core.
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Old 10-11-2016, 09:56 PM   #6
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Thanks for your input. Previous units we had either had a T valve and siphon hose or you could dump directly into the tank. This unit has neither. I DID get it done by unscrewing the fitting off inlet side the pump, buying a new fitting, and installing it and a siphon hose. next year I will install a T valve to make it easy.
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Old 11-20-2022, 07:50 AM   #7
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I also have a 2015 Mirada 35BH and I ended up using an alternate solution to winterize. It is true that the fresh water tank is not accessible in any way so I had to get creative. I emptied the water heater and bypassed it using the valves. Then, I removed the panel above the propane tank so I could see the side of the fresh water tank and see the water level. I noticed that it doesn't sit flat and will hold water so I placed blocks under the right side stabilizers and lifted the rv using the right stabilizers only so it tilted left. Then I ran the water pump with the hot and cold drains open until I got a trickle. This emptied the fresh tank. I looked into hooking onto the water pump and siphoning from a bottle but there wasn't a lot of room and I wanted to be able to put antifreeze in the fresh water tank and lines as well. So instead I got a ten foot garden hose and an adapter from amazon ( I ran the hose to the fresh water fill and then I attached a bottle of antifreeze to the other end with the adapter. I used a ladder to hold this in place with some height above the level of the tank. You could probably also do this easily from the roof without the need for a ladder. Once it was all hooked up I stabbed an air hole into the bottle. It takes a few minutes for gravity to get the antifreeze from each bottle into the tank. I put 3 gallons of antifreeze into the tank. Then I made sure my drains were closed and the filter casing was hooked up but the filter itself was removed. Then I tilted the rv left again and just ran the pump and went around the rv running all water outlets until antifreeze came out. I used another gallon to dump some more into the gray and black tanks. I know this thread is old but there are still 2015 Miradas out there in good shape running so I hope this helps somebody that was as frustrated as I was. I'm also a first time RVer so please feel free to criticize my post so I can learn from you and maybe do it better next year.
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