Thoughts on Leaving Propane On for Furnace at Night? - Page 5 - Fiberglass RV


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Old 10-08-2015, 12:40 PM   #57
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I just sent a 2nd request.
They were answering to my first posts within hours. I guess that R&D isn't as quick.
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Old 10-08-2015, 02:25 PM   #58
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I just got a call from Eric Becker at Manchester Tanks in Elkhart, IN.
As it turns out, asking about RV LP tank valves is a complicated question. Here's a summary of what we discussed.


1. Some RV tanks will have a back seating valve, but you have to contact the valve manufacturer to find that out, most don't


2. All valves should be opened all the way or closed all the way, BUT:
Valves should only be opened and closed "Finger Tight".
Valves that leak at any point when partially or fully open should be serviced or replaced. Most RV tanks valves are not intended to use back seating to seal.
Partially open valve (i.e. 1/4 - 1/2 turn) can develop icing in the valve and can shut down.
Over tightening either way can damage the valve mechanism, seats and/or seals.
First responders expect valves to be fully open when responding and will turn them off if possible.


Summary:
Open valves all the way, but do so "Gently"
If there are any stem leaks at any point after opening, the valve should be serviced or replaced.
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Old 10-08-2015, 03:50 PM   #59
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Good to hear that reply from Manchester. Kinda what I suspected, but now I can be confident in knowing.
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Old 10-08-2015, 07:36 PM   #60
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Thanks Bob

Sent from my SM-T230NU using Fiberglass RV mobile app
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Old 10-18-2015, 07:01 PM   #61
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The shut off device that is triggered when the propane is turned on too fast or a large leak occurs is NOT in the regulator
It's in the newer flexible lines what have the Acme thread and large knob

In this link in the 8th or 9th paragraph down it states:
Propane 101-The basics


This is significant because two safety features are built into the Acme nut itself. First, Acme nuts contain a thermal bushing, which will melt in a fire, and prevent the escape of gasses from the tank. When it melts, it allows the new OPD spring activated shut off valve, which will only allow the flow of gas if a fitting is attached, to pop out and completely shut the flow down. They also have an improved excess flow check valve, compared to the valve in the old POL fitting-more on that later. The new Acme nut also adds an O-ring to further help prevent leaks at the connection.


Joe
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