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Old 08-14-2016, 10:51 AM   #1
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Anybody know what size the gray plug in the picture would be? And what it's called?

This is coming out of the fresh water tank. I'm missing one of these gray plastic plugs like you see in the picture.
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Old 08-14-2016, 11:57 AM   #2
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The one you still have fit both? If so take that one you have to any home improvement store and hunt down one that works or better yet find a valve that fits.

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Old 08-14-2016, 12:15 PM   #3
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Pretty sure it's 1/2" PVC

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Old 08-14-2016, 12:21 PM   #4
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X2 1/2" NPT plastic plug. Home Depot stuff

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Old 08-14-2016, 12:40 PM   #5
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I would agree that the easier fix is to install inline valves in the compartment. By doing this you not have to get on the ground to drain the tank and water system.

My next modification is install the valve and t to fill the freshwater tank from the winterization hose.
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Old 08-16-2016, 07:36 AM   #6
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Older RV, correct

I had them on my 1998 FR Wildwood 26ft 5er.
They are a half inch plug, unfortunately the insides are tapered at a 45 degree angle and there is a mating rubber washer located inside the female end on the piping.

I never was able to find any replacements that sealed properly.

I ended up removing the female hose ends and replacing them with 1/2" id plastic pipe to male hose bib ends and then used a female hose bib cover.

You could also go the route of a 1/2' id plastic pipe to 1/2" male pipe fittings and 1/2" female pipe caps.

Got a tractor supply company near you? It's a great place to get nylon plumbing fittings in almost any size. Farmers use them for fertilizer spraying systems

Hope this helps. and good luck finding those male pipe plugs.
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Old 08-16-2016, 08:23 AM   #7
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I bought one to have as an extra,,, got it @ our local RV dealer !!!
Our Sunseeker 2500TS only has one,,, it is on the hot water low drain !!!
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Old 08-16-2016, 09:38 AM   #8
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On my previous trailer I had problems removing the caps. I replaced with brass valves from HD. Took the handles off so no one opened them on me when I didn't want them to be open. I stored the handles win my water connection bin.
For the PEX tubing I bought a crimper and clamps since normal hose clamps don't work on those. Another tool & clamps I keep in my onboard tool box. Came in handy when I had a leak under the bathroom sink while traveling.
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Old 08-18-2016, 12:41 PM   #9
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Thanks for the responses, everyone. Home Depot didn't have PVC plug so we used a brass plug instead. Seems to be holding up fine. Used teflon tape on the threads when I installed them.

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