Learn how to troubleshoot using schematics like a real tech…

Click here to check out our structured, online appliance repair training courses for rookies and experienced techs.

FAQs | Repair Videos | Academy | Newsletter | Podcast | Contact

Stay connected with us...

Samurai on Facebook - become a fan today! Sign up for our free newsletter and keep up with all things Appliantology. Subscribe to our YouTube channel for lots of appliance repair tips and help! Follow the Samurai on Twitter and get timely morsels of Appliantological Wisdom! Subscribe to our MST Radio podcast to learn secrets of the trade.
  • Announcements

    • Samurai Appliance Repair Man

      Webinar Recordings Index Page   11/07/2017

      On-demand appliance repair training videos for Professional Appliantologist members Over 30 hours (and growing!) of original, high quality appliance training webinars developed and given by yours truly are at your fingertips, on topics you won't find anywhere else. Fill in those knowledge gaps, strengthen those areas of uncertainty, and boost your skills. Watch on mobile or desktop at your convenience whenever, wherever.  Ultra Short Primer on Basic Electricity, Circuits, Ohm's Law, and Schematic Reading (Length: 1:04:48) Basic Refrigerator Troubleshooting (Length: 1:10:45) Schematic Reading Workshop, 10/2015 (Length 1:19:08) Troubleshooting Strategies for Computer-Controlled Appliances (Length: 48:34) Semiconductors and PN Junctions (Length: 1:04:37) Appliance Temperature Sensing Devices & Technology (Length: 1:27:33) Voltage Measurements, Meters, Ghost Voltages, and Triac-controlled Neutrals (Length: 1:29:32) Troubleshooting with Tech Sheets, Part 1, 4/2016 (Length: 1:09:26) Troubleshooting with Tech Sheets, Part 2, 4/2016 (Length: 1:21:11) Tech Sheet Review, 4/9/2016: Bosch Speed Cooker, Amana Refrigerator, GE Glass Cooktop Range (Length: 1:22:58) Pulse Width Modulated (PWM) Switches used in Samsung Switched Mode Power Supplies (SMPS) (Length: 27:07) PWM Computer Cooling Fan in a Whirlpool Refrigerator (Length: 14:53) Understanding AC Split-phase Household Power Supplies (Length: 52:41) Troubleshooting a Samsung Electric Dryer without Disassembly using Live Tests and the Schematic (Length: 22:47) Troubleshooting a Bosch Dishwasher No-Heat Problem using the Schematic and Live Tests (Length: 15:38) Linear Motors and Linear Compressors (Length: 55:54) Bi-directional PSC Drive Motor Systems in Whirlpool VM Washers (Length: 56:52) Appliance Service Call Structure and Troubleshooting Strategies (Length: 1:00:16) The Ten Step Troubleshooting Tango and Workshop Exercises (Length: 1:35:39) Troubleshooting Ten-Step Tango Advanced Workshop (Length: 1:32:06) Ten-Step Tango Troubleshooting Workshop: Refrigerators (Length: 1:35:57) Whirlpool Duet Washer Schematic Analysis & Whirlpool Dryer Moisture Sensor System (Length: 1:03:04) Neutral Vs. Ground, Inverter Microwave, Digital Communications, Loading Down in DC loads, and more! (Length: 1:14:45) Gas Oven Service Call After a Parts Changing Monkey (Length: 36:04) AFCI and GFCI Circuit Protection Technology (Length: 41:26) Troubleshooting Samsung Refrigerators and more (Length: 1:29:58) 3-way Valves and Dual Evaporator Refrigerators (Length: 1:15:45) Split-Phase Compressors and PTC Start Devices (Length: 1:11:57) Gas Dryer Ignition Systems (Length: 53:50) Refrigerator Sealed System Thermodynamics, Part 1 (Length: 43:07) Refrigerator Sealed System Thermodynamics, Part 2 (Length: 1:09:09) Refrigerator Sealed System Thermodynamics, Part 3 (Length: 1:11:56) Refrigerator Sealed System Thermodynamics, Part 4 (Length: 37:45) Refrigerator Sealed System Thermodynamics, Part 5 (Length: 16:35) To access these webinars and all the other info-goodies here at Appliantology, become a Professional Appliantologist today. If you need cost-effective, time-flexible, state-of-the-art appliance technical training, check out the Master Samurai Tech Academy.
    • Son of Samurai

      [Webinar] Appliantology Workshop   11/09/2017

      Information is the name of the game in the appliance repair trade today. Appliantology is a powerful information tool for the professional appliance repair technician. But just like with any of the more capable tools in your tool bag, many of the more powerful features are hidden from you unless you "read the manual." Ugh! Who wants to do that? Well, this is one time when you don't have to! In this webinar, Team Samurai will personally walk you through the site and show you many of the useful and powerful features that even long-time users probably never knew existed.   
demonrow

Water Heater P&T valve leaking - pressure coming in from city

Recommended Posts

demonrow

I found a post in this forum that appears to answer my question, but I wanted to start a new topic to get a better grasp of the big picture.

 

My p&t valve line goes up and out to the patio. There appears to be water there (maybe 8 to 10 oz) every morning (after showers?). Here's the post that leads me to believe its either build up or too much pressure.

 

http://appliantology.org/topic/27317-water-heater/?hl=p

 

So if it is too much pressure, here's my question; how much pressure should be coming in from the street? Its City water. Is this a measurable thing, for a non-plumber like myself? A way to test it?

 

We have a toilet that chronically runs for a second or two occasionally (I've replaced the entire tank kit by now) that also made me think I had too much pressure.

 

I'm familiar with the valve to limit the incoming pressure, but only in passing. I say hello. Its silent...

 

Any advice would be grratly appreciated. Even if its "Dude, call a plumber..." I can post pics and models #'s, but for now its more of a general, philosophical discussion.

 

Thanks,
D

 

 

Share this post


Link to post
Share on other sites

Need appliance parts? Call 877-803-7957 now!

certified tech group 51

Measure the water temperature, is it hot????..............Should not be over 120 degs. F.........Could be a failing  thermostat  letting the water get to hot after long heating cycles.......The P/T valve does not limit incoming pressure...............The P in P/T valve is for  pressure caused by   the  water system  ( city or a well pump ) exceeding the  valves rating about 150 P.S.I.....................The T in P/T is for temperature......... .If the temp exceeds it set  temperature , about 210 degs..................... possibly from a runaway condition of the thermostat(s)...................The big box stores have a pressure gauge that threads onto a standard garden hose bib, measured from out side or attach to the hose bibs at the washing machine................Gas or electric?????.

Share this post


Link to post
Share on other sites
demonrow

Thanks. Its a gas unit. I'll check the temp. The toilet running leads me to think it might be pressure, so I'll look into the gauge. Appreciate your help; I'll report back.

D

Share this post


Link to post
Share on other sites
RegUS_PatOff

click on picture
P2AStudioShot.jpg

my city water pressure is 42 psi

Share this post


Link to post
Share on other sites
demonrow

Cool, thanks!

Share this post


Link to post
Share on other sites
demonrow

Hey,

 

Finally got around to testing this. Got the pressure gauge. Pretty cool. The overflow pipe from my water heater doesn't have the threading. Put the gauge on my outside spicket and got about 68 psi. It spiked to 120 when I first turned it on.

 

Have not measured the water temp coming out of the heater, but I usually shower with no cold whatsoever, can't be too hot. We have (or at least had) small children, so we've always run it set just under "hot". Guess I could use a meat thermometer....

 

I'll report bck.

 

Thanks,

D

Share this post


Link to post
Share on other sites
RegUS_PatOff

... Guess I could use a meat thermometer....

 If you have a Harbor Freight Store near you,

$ 3.99 sometimes on sale for $ 2.99

image_1255.jpg

Share this post


Link to post
Share on other sites
JJ Surfer

Your hot water heater Should have a max pressure rating, I'll bet 120 psi is close to its max. Either an adjust to your pressure regulator or replacement might be needed.

Share this post


Link to post
Share on other sites
olyteddy

Is there a backflow or check valve on your water supply? If so, you may have to add an expansion tank to the supply line of your water heater. 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now