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Water got inside and is npt working now,. - Texas Instruments TI-84 Plus Calculator

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Any amount of water that reaches the interior circuitry will cause an electronic shortage. Disassemble the back of the calculator and place it on a cotton towel with the open side down, then keep the calculator in a heated area for about 2-3 hours to attempt to dry the water out. Replace the battery and attempt to power-up the device. If you get no power, then it would be relatively cheaper to purchase a new calculator rather than take it to an electronic shop for diagnostic purposes.

Posted on Oct 25, 2010

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The plastic nut brok off were the arm throw water out


I had the same thing. I lopped off the other one with a hacksaw, drilled and tapped it 1/4 NPT pipe thread, ran the same tap down the alum arms and reassembled with short close nipples 1/4NPT pipe. Used brass close nipples. Works now.

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1 Answer

Cannot shut off water to my atwood hot water tank in order to winterize


If you have no by-pass, or perhaps a valve in the system is faulty, simply but a 1/2"NPT fitting or nipple with Male threads both ends, or if necessary I use a 1/2"x 1/2" x 90 degree elbow and simply take lines off tank and join them together at the nipple or fitting you choose. That's a by-pass believe it or not. Or a simple piece of clear braided hose, with a barbed fitting clamped on each end with 1/2" NPT Male, then you can bend it around to where you need it rather than your lines.

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1 Answer

I am living in Argentina I buy a Melnor Yardworks model 59-7470-0 in Canadian Tires in Canada Unfortunly the treads conectos are of difernt that we have commoly here for example Gardena and others...


This is not going to be an easy 1:1 conversion
I believe Argentina uses BSP British Standard Pipe
Unknown what thread is used for water hose in Argentina.
US sold products use NPT tapered pipe thread
US has different-but-similar thread for water hose.

So you need at least 2 adapters:
Adapter from 3/4" BSP to 3/4" NPT.
And then adapt 3/4" NPT to 3/4" hose thread.
And then possibly another adapter to hose thread in Argentina.

There is no immediate link announcing which vendor sells BSP to NPT adapter fittings, in Argentina.
However, the following link sells adapters, in Australia:
http://www.irrigationwarehouse.com.au/category2_1.htm

You can google the following search parameter in Argentina:
Adapt NPT pipe thread to BSP pipe thread

Issue is compounded with 2nd adapter problem.
Melnor sells water timers that screw onto a hose bib.
3/4" hose thread is different than 3/4" NPT pipe thread because 3/4" pipe thread is tapered, while hose thread is straight with no taper.
When connecting a water timer to hose bib, the seal is made with rubber washer.

Home centers in US sell 3/4" NPT pipe thread to 3/4" hose thread.
http://quinbyhardware.com/Products/SKU/4294278/3-4MHX3-4MIP-BRASS-CONNECT/LAWN-and-GARDEN/WATERING/GILMOUR-MFG

You can google the following parameter, but sources might not be in Argentina: 3/4" hose thread to 3/4" pipe thread

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3 Answers

My rheem 50 gal water heater model 81mv52d keeps tripping the breaker, what do i need to do to stop this


Check all wiring at water heater and possible upper thermostat is bad, and in need of replacement.

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1 Answer

My Atwood RV Water heater does not allow water to pass through. It goes in the bottom but does not come out of the top. No clogs are apparent and the plumbing all passes water. I removed the bypass valve...


The fitting at the top of tank where line connects is usually a check valve, Good chance the check valve has blown apart inside and plunger is blocking flow through it. Either get yourself another or even use a short 1/2" NPT plastic or galvanized pipe nipple to replace it and you should be good.

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1 Answer

What size npt thread is the adaptor


Common American National Standard Pipe Taper Threads
  • NPT - National Pipe Thread Taper
  • FPT - female (internal) National Pipe Taper threads
  • MPT - male (external) National Pipe Taper threads
  • NPTF - Dryseal American National Standard Taper Pipe Thread (ANSI B1.20.3)
For NPT threads a sealant compound or Teflon tape must be used for a leak-free seal. For NPTF no sealant is needed for a sealing.
Characteristics of NPT (also known as ANSI/ASME B1.20.1 Pipe Threads, General Purpose):
  • tapered thread 1o 47'
  • truncation of roots and crests are flat
  • 60o thread angle
  • pitch is measured in threads per inch
Note! Pipe sizes do not refer to any physical dimensions. The outside diameter of a pipe or fitting must be measured and compared to a table for size identification. A 3/4" NPT pipe thread has an outside diameter - OD - of 1.050 inches.
Each thread size has a defined number of threads per inch - TPI, or pitch. The 3/4" NPT pipe thread has 14 threads per inch. Both the TPI and OD of the thread are required for positive identification of thread size because more than one size have the same TPI.
NPT - American Standard Pipe Thread Taper 1) Pipe Size
(inches) Threads per Inch
TPI - pitch Approximate Length of Thread (inches) Approximate Number of Threads to be Cut Approximate Total thread Makeup, Hand and Wrench (inches) Nominal Outside Pipe Diameter
OD
(inches) Tap Drill
(inches) 1/16" 27 0.313 1/8" 27 3/8 10 1/4 0.405 R 1/4" 18 5/8 11 3/8 0.540 7/16 3/8" 18 5/8 11 3/8 0.675 37/64 1/2" 14 3/4 10 7/16 0.840 23/32 3/4" 14 3/4 10 1/2 1.050 59/64 1" 11-1/2 7/8 10 9/16 1.315 1-5/32 1-1/4" 11-1/2 1 11 9/16 1.660 1-1/2 1-1/2" 11-1/2 1 11 9/16 1.900 1-47/64 2" 11-1/2 1 11 5/8 2.375 2-7/32 2-1/2" 8 1 1/2 12 7/8 2.875 2-5/8 3" 8 1 1/2 12 1 3.500 3-1/4 3-1/2" 8 1 5/8 13 1 1/16 4.000 3-3/4 4" 8 1 5/8 13 1 1/16 4.500 4-1/4 4 1/2" 8 5.000 4-3/4 5" 8 1 3/4 14 1 3/16 5.563 5-9/32 6" 8 1 3/4 14 1 3/16 6.625 6-11/32 8" 8 1 7/8 15 1 5/16 8.625 10" 8 2 16 1 1/2 10.750 12" 8 2 1/8 17 1 5/8 12.750 14" 8 14.000 16" 8 16.000 1) The taper is 1/16 inch in an inch, which is the same as 3/4 inch in a foot (angle 1o 47')
NPT threads are not interchangeable with NPS - National Pipe Straight - threads.
NPT threads may look similar to ISO 7/1 threads. However, ISO and NPT threads should not be mixed. ISO threads have 55o taper angle versus 60o for NPT. The NPT root and crest configurations are also different from ISO. For ISO threads pitch is usually measured in millimeters (may be expressed in Inch). The pitch are different.

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1 Answer

The hose leading out of the water heater on the inside of the trailer has rusted off. My dad has in the past use epoxy putty to repair it but it has come loose again and I would like to know if and how it...


Coming out of the back should be a 1/2" NPT short nipple, or a check valve with 1/2" NPT threads. ( NPT = National pipe thread. Just ask for a 1/2" galvanized pipe nipple the right length.(short, or 2" usually) If it's a check valve, it will usually be brass or plastic/nylon. I prefer galvanized just because the tend to hold up better. Most water lines connect to that, unless yours has a different fitting such as a female flare going to a male flare fitting in tank. Either way, you'll have to get old one out and match it, to allow for water line fitting to re-attach, or change end of water line to proper fitting to attach to nipple. Without seeing exactly what you have, I can't explain exactly what you need to do.

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1 Answer

Not getting enough water


you would need to remove the inlet water valve, the screen is just past your installation point

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Blow Gun Specs


Specifications for air blow guns include pressure capacity and air line connection type. Pressure capacity or maximum rated pressure is rated at the air inlet and measured in pounds per square inch (psi). Many types of air line connectors are available. Quick-release connectors contain fittings that are attached internally. By contrast, push-on connectors include barbed ferrules. Air blow guns use several types of national pipe thread (NPT) connectors, most of which are inch-based and female. Important NPT measurements include threads per inch (TPI) and outside diameter (OD). 1/8” NPT connectors have 27 TPI and an OD of 0.405”. 1/4” NPT connectors have 18 TPI and an OD of 0.540”. 3/8” NPT connectors also have 18 TPI, but an OD of 0.675”. 1/2” connectors have 14 TPI and an OD of 0.840”. #10-32 NPT threads are also available. Air line connections that can swivel or pivot are suitable for applications that require versatile positioning.

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