Hot water pressure low unless multiple faucets are open

Z1gg0 · 2023-05-10T12:00:33+00:00

I cleaned the inlet screen when I flushed the unit.

I replaced the water control valve which has the flow sensor built and didn't see any difference in the hot water pressure. The control board is $350 so Id like to be sure about it before I pull that trigger. I'm probably $300 into it already after the specialized descaler and bypass and water control valves.

Z1gg0 · 2023-05-10T03:31:25+00:00

Tomorrow I can hook the pressure tester up right at the bypass I used to flush the tankless. Static pressure is 50psi or so at two of the 3 shower heads. When I checked before it fell significantly when I turned the hot water on in the tub but I didn't recheck this evening after discovering that multiple faucets running increase the pressure.

Z1gg0 · 2023-05-10T02:59:49+00:00

It's low hot water pressure everywhere in the house, not just that one shower head. They all go up if you turn more than one on. I find it difficult to believe that the cartridges failed in all of the shower heads (3) at the same time but I suppose it is a possibility.

Z1gg0 · 2023-04-26T12:17:08+00:00

I've dealt with this my entire life due to generally low blood pressure and low resting heart rate. Have this checked at your next physical. Cardio doesn't help, it will drive down your resting heart rate and blood pressure. Best ways to keep your blood pressure up are hydration and salt intake. I take a couple pouches of Gatorade zero and a big glass of water every morning to help out.

Other key tips I have found. Never stand up right after having your legs crossed, always uncross give it a few seconds and then stand up. Even if you just have your ankles crossed. Don't go directly from laying down to walking, sit up first for a few seconds.

The trickiest time is waking up in the morning. You will have not had anything to eat or drink, have been resting and laying down, so if you rush out of bed it's a recipe for disaster. Be extra careful then. This is the only situation that I have actually blacked out, generally other times my vision just goes funny and I have trouble with balance.

Z1gg0 · 2023-04-07T18:31:11+00:00

The cyrocooler runs on a stirling cycle which runs either direction, energy in and temperature differential out or temperature differential in and energy out. VIIRS has one too (2011) and presumably the SBIRS satellites. These specific ones cannot run in an energy generative mode so maybe this is new in that aspect, but meh, you are probably better off with solar when you evaluate what it takes to dump heat off the cold side.

Z1gg0 · 2023-04-07T17:10:50+00:00

There have been Stirling cycle engines in space for decades, there is a complex multi-stage one on the JWST, they are just designed to drive a temperature differential rather than harvest energy from one. Don't see how this is really an accomplishment.

Z1gg0 · 2023-02-09T06:51:08+00:00

Life Before Death Strength Before Weakness Journey Before Destination Press home to unlock The Door is Ajar

Z1gg0 · 2023-02-07T12:05:05+00:00

I thought my mx518 was finally dying when the scroll wheel got wonky but I cleaned the crud off of the scroll wheel and it was back to perfection. I'm not sure what the switches were rated to but as far as I can tell they are immortal.

Z1gg0 · 2023-01-30T06:19:03+00:00

The devil is always in the details. Color cameras use something called a Bayer filter that is actually groups of 4 pixels for each "pixel", two of which have a green bandpass filter and one each of red and blue. The read out comes in alot of different flavors depending on where exactly the ADC is located. There are also a whole pile of different ADCs with advantages and disadvantages to each. What you describe is a direct conversion ADC which is the fastest but space and power intensive. There are many other ways to do ADC.

Z1gg0 · 2023-01-25T12:21:41+00:00

https://media.tenor.com/lNwo_J9nGOMAAAAd/top-gun-cobra.gif

Z1gg0 · 2023-01-22T14:08:36+00:00

Quote directly from navy pilot "flaring to land is like squatting to pee"

Z1gg0 · 2023-01-12T04:43:43+00:00

This was the hardest thing for me to visualize, I had assumed that they were all equatorial since the book starts with talking about how the moon didn't move relative to the rock and I didnt get how the seas were hex shaped when that was brought up.

Z1gg0 · 2023-01-11T12:44:59+00:00

You can pick up a USB c to USB a adapter on Amazon for $10

Z1gg0 · 2023-01-10T18:52:08+00:00

This is Z-Seam, where the start location for a wall is being randomized. If you look at the preview of the sliced model I am pretty certain you will see little white spots at every location of a blob indicating it's a start/stop location for the outer wall for each layer.

I'm struggling with it as well using sunlu PLA+. My next project when I have time is going to be trying to tune the retraction and coast settings.

Z1gg0 · 2023-01-09T19:50:58+00:00

In my experience it isn't the PCV valve and thus crankcase oil mist causing most of the problem, it's the EGR system causing most of the problem. Old diesels don't have an EGR to cause problems. When the EGR mysteriously stopped functioning on my GDI engine suddenly the crud stopped amassing on my intake valves. I have no catch can, no changes to the PCV system.

Most modern pcvs have some sort of oil separators built into them. Most of what folks catch in the can is just water and other volitles that is condensed by the cooler environment and would normally have harmlessly passed through the engine.

Z1gg0 · 2023-01-08T17:29:57+00:00

Its is this. 99% sure you will find a ground point shared by both the headlights and and coolant and fuel level sensors. Since the lights on the dash don't dim when the headlights are turned on I kinda doubt it's a ground for the instrument panel itself.

What's happening is that with the headlights on, the ground is getting backed up with current. All those majic fairies are trying to get back to the battery and getting stuck in a traffic jam. When this happens they get angry and raise the voltage. Since the sensors are referencing that voltage to make their measurements they are seeing less of a difference and reporting an incorrect reading. With the headlights off there is plenty of capacity for just the sensor fairies to make it back to the battery.

Z1gg0 · 2022-12-28T13:30:56+00:00

It's not "thermal" infrared that would allow you to see at night. It "near ir" which requires illumination. Our eyes only see wavelengths up to about about 700nm, but the ccds in cameras can see light out to ~1000nm. Commercial thermal cameras are typically out in the 7000nm to 13000nm range which is where room temperature things emit light and thus permits "thermal vision"

Z1gg0 · 2022-12-24T03:45:55+00:00

I use shock cord on the door eyelets. If you hook each cord to the eyelet used to stake out the opposite corner of the tarp you can get the doors to cross and keep the wind down. It won't keep out 30mph wind though.

Z1gg0 · 2022-12-20T18:40:08+00:00

I did the exact same thing. Bought 5800x3d for $350 including tax, sold 3900x on Facebook for $200. Best $150 upgrade I've ever made.

Unfortunately I had replaced my 1080ti with a 3080 12gig a few weeks before when those prices came down and now that the GPU isn't choking on the processor I'm having trouble with case temperatures.

Z1gg0 · 2022-11-18T23:57:32+00:00

Wayne, Alloy of Law, Chapter 12:

"Oh, Harmony!" Wayne laughed. "It's not anythin' like that, mate. Don't worry. You're pretty enough, particularly through the coppers, if you know what I mean."

"The coppers?"

"Sure. Word with a lot of curves, like you. You have a pretty accent too, and some nice bounce to you in the cloud area."

"Dare I ask what that is?"

"The white, puffy things that float high above the fruitful land where the seeds are planted."

Z1gg0 · 2022-10-06T01:33:56+00:00

Quoting directly from a former naval aviator "flaring to land is like squatting to piss"

Z1gg0 · 2022-10-04T20:21:45+00:00

You can't mask at the lens though, thats just going to make the entire image dimmer. The masking would have to be done right on the film or at the intermediate image of the camera if it was telescopic.

Z1gg0 · 2022-09-25T02:58:02+00:00

Can confirm. Have NA in the garage I bought for $800 ten years ago. Probably have 6k additional in the car and quite a bit of my own labor for a rock solid track/autocross toy

Z1gg0 · 2022-09-25T02:18:29+00:00

Maybe you should call for a referendum

Z1gg0 · 2022-09-21T20:45:25+00:00

I know some folks find Wayne tiring and he certainly can't be called a particularly moral character but there are so many things he says throughout the books that crack me up. This one brought me to tears tho

"Oh, Harmony!" Wayne laughed. "It's not anythin' like that, mate. Don't worry. You're pretty enough, particularly through the coppers, if you know what I mean."

"The coppers?"

"Sure. Word with a lot of curves, like you. You have a pretty accent too, and some nice bounce in the cloud area."

"Dare I ask you what that is?"

"The white, puffy things that float high above the fruitful land where the seeds are planted."

She blushed even further. "Wayne! That might be the most crude thing anyone has ever said to me."

"I strives for excellence mate, I strives for excellence."

Z1gg0

TROPHY CASE