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Old 02-20-2020, 02:10 AM   #1
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Water pressure regulator and tankless water heater.

Iím sure this topic has been covered, but I am having a difficult time finding it. What should the water pressure regulator be set at with a tankless water heater. I have a 2018 Vegas 24.1, and I thought I read somewhere that it should be set at about 60 psi, but I can not find the topic.
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Old 02-20-2020, 02:25 AM   #2
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55psi will not cause a problem.
60psi is better.
They'll work as low as 35psi, but you won't like it at all.
I don't know if they are any better at 65psi.
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Old 02-20-2020, 12:26 PM   #3
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How do you like it does it supply enough hot water for two adults would you buy one if you already had a six gallon
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Old 02-20-2020, 12:54 PM   #4
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I have the tankless hot water system in my 2018 Thor Siesta and love it. It will deliver hot water as long as you have propane. I set my water pressure to 55 and have no issues with it. I set my temp to 106 and run the hot water only in the shower. If it feels too hot I SLOWLY turn on cold to adjust it. If you turn on the cold too fast you will get a cold burst of shower water. Once you understand how the system works you will not want to go back to the old 6 gallon tanked water heater system.
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Old 02-20-2020, 06:38 PM   #5
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I have tried to lower temp, but it won't respond. It goes down to 106, but when water is on, temp keeps going up to 115.
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Old 02-20-2020, 06:43 PM   #6
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I've had that happen a couple of times when the water heater side of the coach was in blasting sunshine. Usually I just use the control to set to 104 for a nice shower temp. DW likes 106!
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Old 02-20-2020, 11:09 PM   #7
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Quote:
Originally Posted by Hugh.vines@att.net View Post
How do you like it does it supply enough hot water for two adults would you buy one if you already had a six gallon
Hugh,

We like our tankless water heater. Once you get used to how it works, no going back to a six gallon WH. Tankless gives you endless hot water. No need to wait for the six gallon water tank to heat up.

DBCassidy
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Old 02-21-2020, 01:10 AM   #8
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love our tankless also!!!
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Old 02-21-2020, 01:41 AM   #9
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I found with ours, using an adjustable pressure regulator set between 50 to 55 psi worked well for us. I set temp to 120, never had a problem mixing cold water in to regulate temp. They are a bit different to use than water from the traditional tank, but once used to it, we had no complaints.
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Old 02-21-2020, 03:35 PM   #10
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Works great water pressure set at 50psi no problems my shower temp 102 wife 111 rest of the time 124 laundry dish washing etc. We don't mix any cold in,we've had campground water pressure as low as 16psi we turned pump on and had no problems.
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Old 02-21-2020, 03:43 PM   #11
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We always run our pump. This causes consistent consistency in water pressure and the operation of our tankless water heater.
We fill the tank, disconnect from shore water, run the pump, Repeat.

We haven't Found a reason to put up with variable pressure or a leak on their faucet we feel bad about, potential hose splits, an added outside obstacle, and we won't waste their water on a long long shower any more than we would waste ours.
40 gallons of water lasts us many days.

We try to make things as easy on ourselves as possible without affecting anyone else's ease.
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Old 02-22-2020, 01:01 AM   #12
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When I had my Outlaw: I used a 50-55 psi regulator, and the tankless system worked great.
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Old 02-22-2020, 01:18 AM   #13
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I'm pretty sure most all of the tank-less water heaters work best between 50 to 55 psi. Once I got rid of the non-adjustable pre-set to 45psi, regulator, and went to the adjustable, virtually all our problems and complaints about the tank-less water heater resolved.
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Old 05-08-2020, 02:34 PM   #14
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Very helpful. We are experiencing problems at 40 psi. We will go with a higher setting to see how that goes. Hoping it is nit the campgrounds issue with low pressure.
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Old 05-08-2020, 03:37 PM   #15
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Get an adjustable water pressure regulator so you can set it to what works the best. I am using one from camco bought it on amazon. I set my water pressure to 55 psi and the system works great.
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Old 05-08-2020, 03:58 PM   #16
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An adjustable pressure regulator is nice... but not necessary.
A 50-55 psi non-adjustable one will work just as well.

My Truma system works perfectly at 40 psi. I keep using the higher pressure regulator because I like the more forceful flow of water better.
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Old 05-08-2020, 04:04 PM   #17
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Bob, don't know about the one you have, but the my experience with the Girard, was that it worked very well, as long as the water pressure was between 50 and 55psi. Never had a problem with it, no issues adjusting temp by regulating hot and cold water flow at the faucet or shower.
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Old 05-08-2020, 04:16 PM   #18
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We used to regulate the temperature in our Girard by adjusting it at it's controll panel. We never toughed the cold water facet once!
(Set it at 108 for showers, and 115 for washing dishes)
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Old 05-08-2020, 04:38 PM   #19
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Just FYI!
Whether you have an adjustable or preset regulator they will not increase pressures. They are designed to reduce high pressure to their set points. If the spigot you're connected to is only 40 psi then you will only have 40 psi regardless of regulator. So if your wh needs more psi use the pump if it's set higher.
If your coaches water pump is set at 50 psi then it will always be 50, if that's good for the water heater then use the pump.
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Old 05-09-2020, 01:25 AM   #20
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We rarely encountered parks that had low water pressure, so getting 50 to 55psi was not a problem. If the parks pressure is low, you can always run the onboard pump to boost it.
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