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Old 04-11-2015, 06:17 AM   #113
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Originally Posted by SteveSueMac View Post

I'm a little stumped. I've turned on the electricity to the water heater to see if once it's heated that changes the pressure but I think that's wishful thinking on my part.

Attachment 235987

Well - that WAS wishful thinking 😒

I'm still getting about 1/3 the volume on the hot side. Would certainly welcome any insights on that.

While the hot flow is slow, it is hot (so the HWH is working) but it's foamy so no question antifreeze made it in to the HWH - I don't know if that's the way it was winterized or the way I summerized. The bigger issue for me is the slower flow for hot than cold.
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Old 04-11-2015, 06:23 AM   #114
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The mixer will only reduce hot flow as I recall my brother in law's issue. Pull it out and clean the screen in the left end. ...again as I recall.
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Old 04-11-2015, 06:31 AM   #115
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Ok I'll give that a try. I'll use as is for the rest of the weekend and after I put it away and everything cools down I'll give that a shot. Thanks, dznf0g.
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Old 04-11-2015, 07:02 AM   #116
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Suggest its a screen issue as noted earlier. I know I'll get kick back on this one; but for over 40 years I've never put RV Anti Freeze in the lines. I blow the entire system out, put a little AF in the pump and in the drains and that is it, oh and by pass the HWH as well. And we get sub zero weather here many times throughout the winter. Then in spring, turn water on and let it run through the system, un bypass the HWH fill the water tank up and go. For probably 35 years I never sanitized, actually never thought about it, neither did my father in his AS which he and my mother did about 275,000 miles in. But I do sanitize now.
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Old 04-11-2015, 07:54 AM   #117
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Paiceman, I used to just blow the lines as well when I got my first hardside SOB. It was fine for several years in Michigan, then one year, just a drop or two remained in the shower faucet assembly and it cracked. Belt and suspenders now.

I realize that may have been a fluke and certainly the faucet was a very cheap RV specific faucet, but....again....belt and suspenders for me.
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Old 04-11-2015, 12:28 PM   #118
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While we typically don't have subzero temps, we have plenty of days sub freezing. I do winterize the toilet and remove the Oxygenics shower head, but other than that I simply gravity drain all the lines. There's enough slope that I haven't had any issues for five years now. A "y" fitting attached to a valve at the cold inlet of the water heater allows easy draining of most of the water out of the tank as well. I use the trailer routinely in the winter, so having the lines set up with enough slope to gravity drain is a huge timesaver.
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Old 04-19-2015, 02:22 PM   #119
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Steve', your hot water line may be air bound. Remove all the strainers on the sinks and clean them out. Even with an inline filter, grit gets through and lodges in the strainers and restricts flow, so if the hot water line is air bound, the resistance from a clogged strainer may make a difference. You should get air, foam and bubbles for a while, then better flow, them more air, etc., until it flows better. If all the sinks and shower flow badly, the problem may be a partially blocked common line before they branch off. You could run air from a compressor through the hot water line—maybe it would be more pressure than city water which can be as low as 20 lbs. You may have to stick an air hose in the water heater drain hole.

If that doesn't work, apply compressed air at a sink line (which means disconnecting it from the faucet) and back flush until it forces out whatever is in there. You can also try to blow it out with your mouth as that may be easier than getting a positive connection with an air compressor hose.

I think ours has lower pressure on the hot side and that may be because the system is unbalanced and there's not much you can do about that. Have a towel ready because it is inevitable that some water will blast you in the face or hit the wall once you free up any obstructions.

In the future, an inline filter in a hose filling either the fresh water tank or in use for city water, will reduce the grit that comes through from where ever you fill it.

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Old 04-19-2015, 02:51 PM   #120
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Thanks Gene. Will check all that out. Fwiw - by the end of the weekend there was better hot water flow. We always use a filter on the city line and I fill the FW tank with the hose from the outdoor shower (removing the shower head and using that hose - which means the water is filtered city water).

There was a TON of gunk on the external filter screen at the city water source by the end of the weekend. We're out again this weekend so we'll see what shape we're in and will consider your note a good check list if we're still having trouble. Thanks so much!!
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Old 04-19-2015, 03:05 PM   #121
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Glad to hear it is resolving itself. Maybe those small air bubbles in the lines are working themselves out. When I summerize, I run much diluted Clorox through the system to sanitize it, them flush three times. Each time I get a lot of air through the lines, then some water, air, etc., until I get a good flow. Patience is a virtue.

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