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Simple, straightforward and low shipping rates for these pressure testing products.


Testing Products Expansion Plugs


No plumber's tool box is complete without a complete selection of testing gauges, test plugs, test caps, and other testing equipment. PlumbingSupply.com® has the products you need at prices you can afford. Click here for many other plumbing-related tools we offer.

Low Pressure Gas Test Kit
Also Known As The "Manometer"
Manometer kit
Low Pressure Test Kit Features:
  • Check for pressure loss due to leaks or line restrictions
  • Gauge displays 3 types of measurements including:
    • 0-20 oz per square inch (in 1 oz per square inch increments)
    • 0-35" of water column (in 1 inch of water column increments)
    • 0-8.6 kilopascals (in 0.1 kilopascal increments)
  • 30" soft hose
  • Barbed (to fit manometer tubing)
  • Includes 1/8" MIPS brass barbed adapter
  • Comes in a durable hard plastic case
  • Usable for natural gas or LPG
  • Great for testing:
    • Leaks in the installation
    • Regulator delivery pressure test
    • Regulator lock-up and leakage

Low Pressure Gas Test Kit = $49.97

Order 2 each for greater savings.
Order 6 or more of the same item for even greater savings!

Volume discounts will appear in your shopping cart.

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"Lazy Hand" Water Test Gauge
Lazy hand test gauge "Lazy Hand" Water Test Gauge Features:
  • 2 Models Available:
    • 0-160 PSI gauge readout
    • 0-300 PSI gauge readout
  • Attaches to 3/4" hose thread
  • High level indicator that remains at the highest pressure level until you reset it
  • Determines if you are getting pressure surges
  • Put it on a hose bibb and leave it on for a long time. When you come back it will indicate the highest pressure that was reached during your absence.
  • Click here to learn how it operates
0-160 PSI "Lazy Hand" Water Test Gauge = $15.29
0-300 PSI "Lazy Hand" Water Test Gauge = $15.58

If you have excessive pressure, you may want to consider a pressure regulator.

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Standard Water Test Gauge Kits
Water Test Gauge
Shown: TWT100
Specifications:
  • Includes 3/4" female hose thread
  • These are not oil filled
  • Ships unassembled
Part # Max PSI Price & Quantity
TWT030 30 PSI $13.86
TWT060 60 PSI $13.90
TWT100 100 PSI $13.94
TWT200 200 PSI $13.96
TWT300 300 PSI $12.23

Only need a pressure gauge, buy them here.

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Test Gauge Kits
Gas Test Gauge
Shown: TGT015
Specifications:
  • 0 - 15 PSI scaled in 1/10# increments
  • Includes 3/4" female pipe thread (FPT)
  • Includes a Schrader-type valve to pressurize the line
  • 2" Gauge face
  • Complies with sec. 319.0 of UPC
  • Ships unassembled
Part # Max PSI Price & Quantity
TGT015* 15 PSI $11.97
TGT030 30 PSI $11.96
TGT060 60 PSI $11.89
TGT100 100 PSI $11.94
TGT200 200 PSI $13.98
* First pound is in 1/5 PSI increments. 1/10 PSI increments after first pound

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click here for other pressure gauges including vacuum gauges



Inflatable Test Balls/Balloons/Plugs
10 PSI Maximum Pressure
Test Balls

Short Style (Less Hose)
Part # Size Price & Quantity
TTB075S 3/4" to 1-1/4" $37.75
TTB150S 1-1/4" to 1-1/2" $25.86
TTB200S 2" $27.82
TTB300S 3" $30.69
TTB400S 4" $34.34
TTB600S 6" $80.96
TTB800S 8" $130.46

Long Style with 2' Extension Hose
(except where noted)
Part # Size Price & Quantity
TTB200L 2" $52.79
TTB300L 3" $60.13
TTB400L 4" $72.82
TTB600L 4" to 6" $157.82

1/4" Extension Hoses
Part # Size Price & Quantity
TEH200 2 Feet $7.61
TEH300 3 Feet $8.24
TEH400 4 Feet $9.27

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Test Plugs
Dollar Plug With Wing Nut
Test Plug
Part # Size Price & Quantity
TDP100 1" $2.99
TDP125 1-1/4" $3.19
TDP150 1-1/2" $3.29
TDP200 2" $3.99
TDP300
Super Wing Nut
3" $5.99
TDP400
Super Wing Nut
4" $6.99
TDP600 6" $12.96

Use with caution if testing with air or other compressed gas

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Mechanical Plugs
Mechanical Plug
Part # Size w/ Wing Nuts
TMP039 .39" $3.36
TMP050 1/2" $3.08
TMP075 3/4" $3.23
TMP100 1" $3.77
TMP125 1-1/4" $4.31
Part # Size w/ Hex Nuts
TMP150 1-1/2" $6.89
TMP200 2" $9.63
TMP250 2-1/2" $13.44
TMP300 3" $15.47
TMP400 4" $24.73
TMP500 5" $32.88

Use with caution if testing with air or other compressed gas

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Winterizing Plugs
Expansion Plugs
Winterizing Plug
Part # Size Price & Quantity
TWP075P 3/4" to 1" Pipe $1.57
TWP100P 1" Pipe $1.61
TWP100F 1" Fitting $3.05
TWP125P 1-1/4" Pipe $2.18
TWP125F 1-1/4" Fitting to 1-1/2" Pipe $2.60
TWP150P 1-1/2" Pipe $2.52
TWP150F 1-1/2" Fitting $2.66
TWP200P 2" Pipe $3.95
TWP200F 2" Fitting $4.08

Use with caution if testing with air or other compressed gas

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Winterizing Plugs
1 1/2" Mips - Threaded Plug with O-ring
Winterizing threaded plug with o-ring
Heavy Duty, white ABS construction. The EPDM o-ring is resistant to chemical corrosion and extreme weather conditions and also provides a no-leaking positive seal. Safely seals any female iron pipe thread (NPT) fitting.

Style Size Price & Quantity
FLUSH 1 1/2" Mip $2.95
RAISED 1 1/2" Mip $2.98

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Cleanout/Test Caps
Also Known As "Jim or Jimmy Caps"
With Stainless Bands
Cleanout Cap
Part # Size Price & Quantity
TCC150 1-1/2" $2.44
TCC200 2" $2.56
TCC300 3" $3.50
TCC400 4" $3.79
TCC500 5" $8.42
TCC600 6" $18.47
TCC800 8" $29.81
TCC110 10" $39.80

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Please note: any brand of air inflated test balloons can be dangerous if not used per manufacturer instructions. Please also make sure when you use a test ball/plug, that you have a way of getting the water out of the pipe safely. So please plan ahead. Sticking your hand up a test tee to let the air out of a inflated test ball can cost you some fingers! Water pressure and air pressure can be dangerous for the unsuspecting. In our opinion inflatable test balls should have a chain tied to the pipe and an extension hose to let the air out slowly from a point where your fingers are safe. A test plug should be supported so that it won't slip out of the pipe under pressure.



Frequently Asked Questions

Q. "How does the Lazy-Hand Water Test Gauge work?"
A. Install the gauge on a hose bibb and leave for as long as you'd like. One needle of the gauge will read the current pressure. The second needle is the "lazy hand" which will need to be adjusted by moving the knob on the front of the unit. Adjust the "lazy hand" to where the pressure currently is showing on the gauge. Over night or over time, the "lazy hand" will be moved by the needle reading the pressure when there is an increase in pressure. If the pressure is decreased, the lazy hand will stay where the peak pressure occurred. The "lazy hand" will stay at that peak reading until you manually reset it.

Q. "I have heard using mechanical plugs can be dangerous. Is this true?"
A. YES! EXTREME CAUTION must be taken when using mechanical plugs! Plugs used in conditions under back-pressure with a compressible media, such as air, can cause severe bodily injury or death may occur if the plug slips or fails for any reason. PEOPLE MUST STAND CLEAR while in use. Install only in a clean dry pipe. Failure to heed these warnings may result in serious bodily injury or death. Consult a professional engineer to determine how to safely block mechanical plugs when using air as a test media.
mechanical plug safety diagram



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