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Old 10-08-2015, 12:12 AM   #1
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Questions about replacing city water inlet on Sierra fifth wheel

I have a 2001 Sierra 33' fifth wheel. Model number is 30RLSS. I have to replace the city water inlet because the check valve is definitely bad.

Firstly, which one do I buy? Please be precise if possible. By that I mean what make and model. The one on trailer now is flush mounted with 3 screws. Screw holes are 1 3/4" to 2" apart. (Sorry, but I can't say exactly because trailer is located in a campground in another city and I didn't have a ruler with me. I cut a piece of paper the length of center to center screw hole spacing and measured paper when I got home.)

I spoke with the campground maintenance man and he said besides a new city water inlet I'd need 2 things. One was butyl tape and I think the other was plumbers putty. Does the butyl tape go between the city water inlet flange and the outside of trailer? If I'm remembering right about plumbers putty, where is that used?

Maintenance man said he'd do job for about $100. I'm pretty handy so I'd like to do it myself.

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Old 10-08-2015, 05:07 AM   #2
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This little video should help some.

The butyl tape goes behind the new piece where the screw holes are. You wrap it all the way around the perimeter. I wouldn't worry if the screw holes line up.

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Old 10-08-2015, 05:08 AM   #3
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This one is better;

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Old 10-08-2015, 10:29 AM   #4
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It looks like plumbers putty (or whatever it's called) fills the hole. Do the mounting screws screw into the putty? Or, is some of the putty on the side of trailer and screws screw through the putty into side of trailer?
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Old 10-09-2015, 03:39 PM   #5
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Take the old one out and take it to an RV supply shop and have it replaced with the correct one. Butyl tape will be found at the RV supply shop and any hardware store will have plumbers tape. It should only take about 20 min to fix and is very easy. Don't spend a $100.

Put the butyl tape between the outlet and the trailer wall, put the plumbers tape around the water fitting. The outlet should pull away by about 2 to 3 inches and easily attached. I've done it a couple times.
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