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Old 03-30-2021, 07:49 PM   #1
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Low point drain caps dripping

We took out our trailer for the first time this year. Noticed dripping coming from low water drain caps. Hand tightened even more. Leak stopped and then noticed 3rd morning leaking again. After driving it home noticed once again they were wet. I take it these stupid screw on caps are pretty much worthless. Anyone experience this and was your fix installing ball valves/Teflon tape to the cold and hot low point drains?
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Old 03-30-2021, 07:58 PM   #2
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Are you sure there aren't shut off valves already hidden someplace....perhaps behind a panel? I can't believe it came with just caps! You're going to get drenched taking the caps off of pressurized lines.
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Old 03-30-2021, 07:59 PM   #3
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We took out our trailer for the first time this year. Noticed dripping coming from low water drain caps. Hand tightened even more. Leak stopped and then noticed 3rd morning leaking again. After driving it home noticed once again they were wet. I take it these stupid screw on caps are pretty much worthless. Anyone experience this and was your fix installing ball valves/Teflon tape to the cold and hot low point drains?
I've seen dripping from these and found the rubber seal/washer to be missing... as if it fell on the ground the last time the cap was removed.
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Old 03-30-2021, 08:01 PM   #4
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Are you sure there aren't shut off valves already hidden someplace....perhaps behind a panel? I can't believe it came with just caps! You're going to get drenched taking the caps off of pressurized lines.
My Wildcat came with only screw on caps. I have never removed the caps while the lines were pressurized. Why would you?
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Old 03-30-2021, 08:01 PM   #5
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Replaced our caps with threaded ball valves but was disappointed to see a leak on the cold side. Took the valve off and used Teflon tape and so far so good. Plus having the valves makes it easier when it comes time to winterize.
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Old 03-30-2021, 08:04 PM   #6
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Low point drain caps dripping

I lost a washer on mine the first time out, and couldn’t find a replacement for the white, cone shaped one. I brought the cap to Home Depot and found a plain black washer that fit and it works fine.
Yes, a lot of people put valves in these. I haven’t found one easy enough to turn at the awkward angle.
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Old 03-30-2021, 08:09 PM   #7
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Are you sure there aren't shut off valves already hidden someplace....perhaps behind a panel? I can't believe it came with just caps! You're going to get drenched taking the caps off of pressurized lines.


Yeah I am sure. They are caps for the low water drains
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Old 03-30-2021, 08:10 PM   #8
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My Wildcat came with only screw on caps. I have never removed the caps while the lines were pressurized. Why would you?


I removed them when I winterize my trailer. I do it every year.
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Old 03-30-2021, 08:11 PM   #9
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I lost a washer on mine the first time out, and couldn’t find a replacement for the white, cone shaped one. I brought the cap to Home Depot and found a plain black washer that fit and it works fine.
Yes, a lot of people put valves in these. I haven’t found one easy enough to turn at the awkward angle.


I may have inadvertently lost the washers while winterizing last fall. I will have to check tomorrow see if the washers are even in the caps
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Old 03-30-2021, 08:12 PM   #10
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I may have inadvertently lost the washers while winterizing last fall. I will have to check tomorrow see if the washers are even in the caps

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Old 03-30-2021, 08:14 PM   #11
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How tight did ya have to go on these drain caps?
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Old 03-30-2021, 08:38 PM   #12
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I removed them when I winterize my trailer. I do it every year.
But surely you don’t remove them while the lines are still pressurized.
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Old 03-30-2021, 08:42 PM   #13
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But surely you don’t remove them while the lines are still pressurized.


No why would I? I removed them this past November to drain water while winterizing. Took the trailer out for the first time this year and noticed the caps were dripping.
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Old 03-30-2021, 08:46 PM   #14
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No why would I? I removed them this past November to drain water while winterizing. Took the trailer out for the first time this year and noticed the caps were dripping.
You quoted my post where I said “I have never removed the caps while the lines were pressurized”. I guess that confused me.
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Old 03-30-2021, 08:48 PM   #15
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You quoted my post where I said “I have never removed the caps while the lines were pressurized”. I guess that confused me.


That was someone else in the thread that posted that
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Old 03-30-2021, 09:15 PM   #16
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Yes I have had the lines leak, tightened them down no issues rest of the season. When I winterized I replaced with valves, I thought the caps we a PIA and the washers were hard to keep in when taking off. Bought the valves at Home Depot. Threaded on easily.
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Old 03-31-2021, 04:33 AM   #17
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Yes I have had the lines leak, tightened them down no issues rest of the season. When I winterized I replaced with valves, I thought the caps we a PIA and the washers were hard to keep in when taking off. Bought the valves at Home Depot. Threaded on easily.


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Old 03-31-2021, 07:18 AM   #18
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We took out our trailer for the first time this year. Noticed dripping coming from low water drain caps. Hand tightened even more. Leak stopped and then noticed 3rd morning leaking again. After driving it home noticed once again they were wet. I take it these stupid screw on caps are pretty much worthless. Anyone experience this and was your fix installing ball valves/Teflon tape to the cold and hot low point drains?
You probably lost the seal. Or, it's no longer pliable. You can pick up a fistful from your local plumbing shop for the price of a coffee.
https://www.supplyhouse.com/Viega-43721-VIEGA-1-2-PureFlow-Cone-Seal?gclid=EAIaIQobChMIg5nhr8Ha7wIVS_HACh12HwB2EAQ YASABEgK4bfD_BwE
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Old 03-31-2021, 07:21 AM   #19
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You probably lost the seal. Or, it's no longer pliable. You can pick up a fistful from your local plumbing shop for the price of a coffee.
https://www.supplyhouse.com/Viega-43...SABEgK4bfD_BwE
That is most likely the case. Will be heading to where my Trailer is parked after work to take care of this. I think I am just going to install the pvc ball valves on it.
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Old 03-31-2021, 07:39 AM   #20
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i lost one of the cone washers once and the cap leaked. take the caps off and ensure that you have a cone washer on each drain. it is the cone washer that makes the seal. no need to use teflon tape and you really only have to get the cap on hand snug. not need to torque it down.
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