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Old 05-27-2020, 11:34 AM   #1
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Low point drain?

I have a blue pex line coming from FW tank. We de-winterized this weekend while at our first trip and I sanitized FW tank but found a leak while filling.

Could be the previous owner didnít put the plug back in (if thatís the case, thatís an easy fix with a new plug or ball valve). Wanted to verify thatís what this could be and if this is the case I wonít blow up the FW tank filling it? Other reading has me concerned that this may be an overfill pipe, but considering itís near the bottom of the FW tank, it seems unlikely.

If an air bubble gets in there will it ďburpĒ itself when I run water through the pump?

TIA!
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Old 05-27-2020, 03:26 PM   #2
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Quote:
Originally Posted by Grantley View Post
I have a blue pex line coming from FW tank. We de-winterized this weekend while at our first trip and I sanitized FW tank but found a leak while filling.

Could be the previous owner didnít put the plug back in (if thatís the case, thatís an easy fix with a new plug or ball valve). Wanted to verify thatís what this could be and if this is the case I wonít blow up the FW tank filling it? Other reading has me concerned that this may be an overfill pipe, but considering itís near the bottom of the FW tank, it seems unlikely.

If an air bubble gets in there will it ďburpĒ itself when I run water through the pump?

TIA!
It would appear to be the drain for fresh water tank. Low point drains are placed into your water lines and generally hang down from the RV. These are commonly blue (cold) and red (hot) water lines. Some come with valves some with plugs, some with screw on caps.
Depending on the fill area some units have separate connections for filling the fresh water tank. On our RV we switch a valve to "tank" to fill then switch it back to "city" to use campground water.
If you can take a pic of the area were you hook up water. Also add a pic of underneath it may show the low point drains
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Old 05-27-2020, 03:52 PM   #3
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Agree with hamm. That's a tank drain, not the low point drains for winterizing.
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Old 05-27-2020, 03:59 PM   #4
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From picture it looks like it is coming from the botttom of that tank so it would be tank drain and needs a plug in end of line....better yet would be a shutoff valve.
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Old 05-27-2020, 09:33 PM   #5
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Thanks guys. Found a 1/2Ē cap and threaded it on. Felt like it should have been there anyway. Slightly alarmed when it got the pad under it wet when I wasnít expecting it. Will look at a valve on Amazon in near future.
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Old 05-29-2020, 07:13 AM   #6
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Thanks guys. Found a 1/2Ē cap and threaded it on. Felt like it should have been there anyway. Slightly alarmed when it got the pad under it wet when I wasnít expecting it. Will look at a valve on Amazon in near future.

Most hardware/plumbing stores will have a 1/2 plastic ball valve to fit. I did this on my last trailer that had the cap on the line.
https://www.lowes.com/pd/AMERICAN-VA...lve/1000339557
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