questions.... I have them.. :D
1) the fresh water tank fill on my motorhome is the kind where you have to hook up a hose and have pressure on it, to fill, just like the "city water". I would prefer to have a gravity fill so w...
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Yes that is the correct fitting. You should limit pressure to 45psi or less, so if you use 25 that should be fine. Be sure to open the low point drains so that water can run out. Ideally, if you open the low point drains on the hot/cold lines and the FW tank, the rig should self drain...all you are doing with the compressed air is making sure no puddles remain in case there are any "bellies" in the water lines.
Regarding the gravity fill, how easy it is to change that fitting depends entirely on where the hose fitting is. A gravity fill is larger than a hose fitting so you need to be sure a fill fitting will fit in that spot. Also you have the hose to consider...the hose from a gravity fill port to the FW tank is usually 1 1/2", if you have a hose fitting there the line to the tank is probably 3/4" Pex.
Rigs with gravity fill also have the check valve at the pump, so water doesn't flow back into the tank when hooked up to city water. If you have a hose fitting, the check valve may very well be there like it is on the city water fitting. So lot's more to consider than just changing the fitting...
I have yet to see a gravity fill where you don't need a funnel to fill from a jug. So I wind up balancing a flexible funnel while trying to pour a 5 gal jug into it. Seems much easier to have a spare 12v pump as was mentioned...build a little rig so you can screw the output to the fill valve and stick the suction end in the water jug.
Post a few pics and we can dig into some of these potential issues.
Regarding the gravity fill, how easy it is to change that fitting depends entirely on where the hose fitting is. A gravity fill is larger than a hose fitting so you need to be sure a fill fitting will fit in that spot. Also you have the hose to consider...the hose from a gravity fill port to the FW tank is usually 1 1/2", if you have a hose fitting there the line to the tank is probably 3/4" Pex.
Rigs with gravity fill also have the check valve at the pump, so water doesn't flow back into the tank when hooked up to city water. If you have a hose fitting, the check valve may very well be there like it is on the city water fitting. So lot's more to consider than just changing the fitting...
I have yet to see a gravity fill where you don't need a funnel to fill from a jug. So I wind up balancing a flexible funnel while trying to pour a 5 gal jug into it. Seems much easier to have a spare 12v pump as was mentioned...build a little rig so you can screw the output to the fill valve and stick the suction end in the water jug.
Post a few pics and we can dig into some of these potential issues.
