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Old 05-02-2022, 07:54 AM   #1
Join Date: Apr 2018
Posts: 37
Hot water heater plumbing

Hi, we have a 2021 Lockport park model, with a 20gal electric water heater.
The plumbing in it is very confusing, i was wondering if anybody could look at the picture and tell me what the plumbing is for,, some of it I can figure out. Like hot water out. But we also had it set up for an outdoor shower that makes it more confusing.
If anybody could take a look, i will try to attach a picture
Thank you
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Old 05-02-2022, 08:46 AM   #2
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First, I don't have this setup so I can't be 100% sure... but I think I can make some pretty good educated guesses.

Im the picture I've numbered the valves. (ignore the two verticle lines, they were scribble accidents I didn't catch until I posted)

Valve 1: shuts off the cold water supply to it all.

Valve 2: shuts off cold water into the water heater.

Valve 3: Shuts off hot water leaving the water heater.

Valve 4: Water heater bypass valve.

Valve 5: Water heater drain.

Why all the valves...

Winterization of the water heater.

You don't want RV antifreeze in the water tank so.

1) Turn off water heater (will burn out if you miss this)

2) Drain Tank: Close Valve 1, Open Valve 5. May need to open the over pressure relief valve to let air in (reclose it when done)

3) Bypass tank: Close Valves 2, 3, 5, open valves 1 and 4.

4) you can now pump RV antifreeze into all the plumbing, hot and cold, without it getting into the water heater.

1) purge all the RV antifreeze out of the hot and cold plumbing.

2)Fill water heater: Close valve 4, open valves 2 and 3. (make sure the overpressure relief valve is closed too).

3) Open the hot water side of a faucet, let it run until water comes out without any air spurting/surging. Close the faucet.

4) Turn on hot water heater.

I may have Valves 1 and 5 flip flopped. Look under the RV, which ever has a pipe that just dumps onto the ground, that is the drain valve and the other is the supply. However, the one with blue sharpie all over it, valve 1, I suspect is the water supply.Click image for larger version

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Old 05-02-2022, 08:00 PM   #3
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I agree^^^^^^^^^^^^^^^

#1 Valve is marked in Blue and something is written on that line
#1 valve is open so suspect it is SOURCE/SUPPLY to WH Tank and other items (outdoor shower)
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Old 05-03-2022, 12:28 PM   #4
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Thank you for the input..much appreciated
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heat, heater, hot water, plumbing, water, water heater

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