Antifreeze recommendations

Well it would depend on if you have a six gallon or 10 gallon water heater. Without water heater 2 gallons is more than enough. Now add in the gallonage of your water heater

Signature updated.
Doubt in my own abilities to figure this out plus see no harm in filling water heater with antifreeze, unless there is a real downside. How many gallons will i need to see the pink stuff to start coming out of faucets and outside shower?

SidecarFlip wrote:
If the unit was built in the last decade it should already be there.....

what is that should be there?

Kostyan wrote:
SidecarFlip - I am new to RVing and have no friggin' idea what kind of water heater I have and where is heat exchanged. Just checked Tractor Supply website and searched under RV antifreeze. The only thing came up was $3/gallon Traveller brand...which is more $$ than WalMart


Downtheroad - i do not know which kind to get, but even if I got one would not know how to hook it up/use it. So think it would be safer to just pour like 15 gallons in the water system and the rest spread out between drains (galley, bathroom sink, bathtub drain, toilet drain). How many gallons do I really need if not bypassing the water heater?

Trailer is a 2007 Trail Light by R-Design C21BRH if it matters.

I just checked TSC, that is an in store advertised special.

It would help greatly if you listed your RV and tow vehicle in your signature line so there is no guessing on anyone's part.

You need to look in the compartment where the 12 volt water pump is located and see if you have winterization valves and / or a suction hose to suck in RV anti-freeze. If you do, and can bypass the HWH (HWH's) usually have bypass valves on the backside and are again accessed via a door or cabinet, you shut the inlet (hot and cold) valves and open the bypass valve and then drain the heater. Most it will consume is about 2 gallons. Pour a bit down each drain trap and in the commode (and of course drain the black and gray tanks and leave them empty and you should be good to go. if the unit has an outside shower, be sure to run AF though that as well as all the faucets.

Shut off water supply, drain water heater, blow out water lines and pour 2 gallons of RV antifreeze in the various drain traps. Done.

SidecarFlip - I am new to RVing and have no friggin' idea what kind of water heater I have and where is heat exchanged. Just checked Tractor Supply website and searched under RV antifreeze. The only thing came up was $3/gallon Traveller brand...which is more $$ than WalMart


Downtheroad - i do not know which kind to get, but even if I got one would not know how to hook it up/use it. So think it would be safer to just pour like 15 gallons in the water system and the rest spread out between drains (galley, bathroom sink, bathtub drain, toilet drain). How many gallons do I really need if not bypassing the water heater?

Trailer is a 2007 Trail Light by R-Design C21BRH if it matters.

If the unit was built in the last decade it should already be there.....

Don't pump 20 gallons of antifreeze. Get an inexpensive water heater by-pass and then go to Walmart and buy 2 gallons of whatever they have....probably Camco. 2 gallons will be more than enough.

Something like this:....available lots of places.......Water Heater by-pass kit.....LINK

Why would you not bypass the HWH and drain it entirely, makes no sense to me. If the HWH is a hydronic water heater and ambient room heater, it already has antifreefe in it, but you still have to drain the HWH heat exchanger of tap water.

Most all RV antifeeeze is the same chemical makeup. It's propolyene glycol and it's non toxic. Bakeries use it for dough extender so if you consume sponge bread, you eat it all the time.

Buy the cheapest available. Tractor Supply is running a special right now 2 bucks a gallon.