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Repair Fittings

for Copper, CPVC, PEX and Polybutylene

Need to perform a plastic tubing repair for an mobile home, RV, manufactured home, or residential home? You've come to the right place! Qest fittings are designed to work great with plastic tubing, or any pipe that is Copper Tube Size. These heavy duty compression fittings install easily with just a wrench! We can't imagine an easier solution than these fittings, which allow you to perform quick, easy repairs in those all-too-common, hard-to-reach, tight spaces. Save time and money with Qest fittings from PlumbingSupply.com®.

Shop Repair Fittings by Size

Shop Repair Fittings by Type

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repair couplingFits over copper tube-sized PEX, CPVC, Copper, & Polybutylene pipe

Couplers / Couplings (aka Unions)
Nominal x Nominal

Coupling
Polyb Coupling
Size Price & Quantity
1/4" x 1/4" $5.99
3/8" x 1/4" $6.57
3/8" x 3/8" $5.16
1/2" x 1/4" $8.90
1/2" x 3/8" $8.95
1/2" x 1/2" $5.91
3/4" x 1/2" $8.22
3/4" x 3/4" $8.32
1" x 3/4" $10.47
1" x 1" $10.53
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90° Elbows
Nominal x Nominal

Polyb Elbow
Size Price & Quantity
1/4" x 1/4" $6.56
3/8" x 3/8" $6.77
1/2" x 1/2" $8.12
3/4" x 1/2" $11.04
3/4" x 3/4" $10.96
1" x 1/2" $12.95
1" x 3/4" $13.89
1" x 1" $14.48
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90° Male Elbow Adapters
Nominal x Mips

Male elbow adapter
Size Price & Quantity
SUPER SALE
3/8" x 3/8" $5.35
while supplies last
1/2" x 3/8" $5.90
while supplies last
3/4" x 3/4" $6.42
while supplies last
FOR potable/drinking water
Size Price & Quantity
3/8" x 3/8" $6.69
1/2" x 3/8" $6.84
1/2" x 1/2" $7.15
3/4" x 3/4" $11.42

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90° Female Elbows
Nominal x Fips

Polyb Female Elbow
Size Price & Quantity
3/8" x 1/2 fipt $5.76
1/2" x 1/2" fipt $6.74
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Drop Ear 90° Female Elbows
Nominal x Fips

Polyb Drop Ear Elbow
Size Price & Quantity
1/2" x 1/2 fipt $7.99
1/2" x 3/4" fipt $9.91
3/4" x 3/4" fipt $10.93
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Tees - Nominal x Nominal x Nominal
Complete with cone & grip ring

Tee
Size - (A x B x C) Price & Quantity
1/4" x 1/4" x 1/4" $6.69
3/8" x 1/4" x 1/4" $6.84
3/8" x 3/8" x 1/4" $6.84
3/8" x 3/8" x 3/8" $7.53
3/8" x 3/8" x 1/2" $8.17
1/2" x 3/8" x 3/8" $9.25
1/2" x 3/8" x 1/2" $10.85
1/2" x 1/2" x 1/4" $9.10
1/2" x 1/2" x 3/8" $9.22
1/2" x 1/2" x 1/2" $8.61
Size - (A x B x C) Price & Quantity
3/4" x 1/2" x 1/2" $11.84
3/4" x 1/2" x 3/4" $16.82
3/4" x 3/4" x 1/2" $12.09
3/4" x 3/4" x 3/4" $11.11
1" x 3/4" x 1/2" $15.44
1" x 3/4" x 3/4" $16.31
1" x 3/4" x 1" $16.11
1" x 1" x 3/4" $14.55
1" x 1" x 1" $14.72

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Male Adapters - Nominal x Mips
Complete with cone & grip ring

Male Adapter
Size Price & Quantity
SUPER SALE
1/4" N x 1/2" Mips $7.60
while supplies last
3/8" N x 3/8" Mips $10.71
while supplies last
1/2" N x 3/8" Mips $8.83
while supplies last
FOR potable / drinking water
Size Price & Quantity
1/4" N x 3/8" Mips $9.89
3/8" N x 1/2" Mips $7.43
1/2" N x 1/2" Mips $9.02
1/2" N x 3/4" Mips $8.41
3/4" N x 1/2" Mips $13.23
3/4" N x 3/4" Mips $15.60
3/4" N x 1" Mips $16.22
1" N x 3/4" Mips $28.29
1" N x 1" Mips $26.55

Don't see the size you need for potable water? You can use a female adapter (shown below) and a stainless steel nipple
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Female Adapters - Nominal x Fips
Complete with cone & grip ring

Female Adapter

Size Price & Quantity
1/2" N x 1/2" Fips $6.11
1/2" N x 3/4" Fips $7.96
3/4" N x 3/4" Fips $7.88
3/4" N x 1" Fips $9.64
1" N x 3/4" Fips $10.32
1" N x 1" Fips $10.74
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Female Coupling - Fips x Fips

Size Price & Quantity
1/2" Fips x 1/2" Fips $2.29
3/4" Fips x 3/4" Fips $3.17
1" Fips x 1" Fips $4.47
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Cap - Fips

Size Price & Quantity
1/2" Fips $1.60
3/4" Fips $1.92
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Plugs

Size Price & Quantity
1/2" - octagonal head $1.26
3/4" - square head $1.49
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Angle Stop Valves


Size Price & Quantity
↓ without nut, cone, grip ring ↓
1/2" FPT x 1/2" MPT $6.60
↓ Complete with 1 each: nut, cone & grip ring ↓
1/2" FPT x 3/8" OD (1/4" Nom.) $7.41
1/2" FPT x 1/2" OD (3/8" Nom.) $7.41
↓ Complete with 2 each: nuts, cones & grip rings ↓
1/2" N x 3/8" OD (1/4" Nom.) $8.48
1/2" N x 1/2" OD (3/8" Nom) $8.56
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Straight Stop Valves


Size Price & Quantity
↓ without nut, cone, grip ring ↓
1/2" FPT x 1/2" MPT $7.68
1/2" MPT x 1/2" MPT $7.44
3/4" MPT x 1/2" MPT $7.48
↓ Complete with 1 each: nut, cone & grip ring ↓
1/2" FPT x 3/8" OD (1/4" N) $9.46
1/2" FPT x 1/2" OD (3/8" N) $9.28
↓ Complete with 2 each: nuts, cones & grip rings ↓
3/8" N x 3/8" OD (1/4" N) $10.40
3/8" N x 1/2" OD (3/8" N) $10.46
1/2" N x 3/8" OD (1/4" N) $10.60
1/2" N x 1/2" OD (3/8" N) $10.66
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In-Line Globe Shut-off Valves - Nominal


Size Price & Quantity
↓ Complete with 2 each: nuts, cones & grip rings ↓
1/4" N x 1/4" N $15.50
3/8" N x 3/8" N $15.98
1/2" N x 1/2" N $16.08
3/4" N x 3/4" N $20.42
↓ Valves ONLY ↓
1/2" MPT x 1/2" MPT $12.39
3/4" MPT x 3/4" MPT $12.52
1" MPT x 1" MPT $13.79
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Individual Nuts - For Nominal Pipe Size

Nut
Size Price & Quantity
1/4" $1.08
3/8" $1.13
1/2" $1.28
3/4" $2.43
1" $2.81
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Individual Grip Rings - For Nominal Pipe Size

Grip Ring
Size Price & Quantity
1/4" $0.92
3/8" $0.95
1/2" $0.96
3/4" $0.99
1" $1.02
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Cones - For Nominal Pipe Size

Cone
Size Price & Quantity
1/4" $0.46
3/8" $0.48
1/2" $0.60
3/4" $0.62
1" $0.68
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Copper Crimp Rings
For Nominal Pipe Size

Copper Crimp Ring
Size (Nominal) Price & Quantity
3/8" $0.44
1/2" $0.63
3/4" $0.83
1" $1.09
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Crimp Style Fittings
For Nominal Pipe Size

Copper Crimp CouplingShown: 1/2" Coupling
Size (Nominal) Price & Quantity
1/2" Elbow $3.83
3/4" Elbow $4.63
1/2" Tee $5.81
3/4" Tee $8.02
1/2" Coupling $2.69
3/4" Coupling $3.16
1/2" x 1/2" MIPS Crimp Male Adapter
Not for potable/drinking water
$4.99
Limited to Stock
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Shop Repair Fittings by Size

1/4" Repair Fittings

Description Price & Quantity
1/4" x 1/4" Coupling $5.99
1/4" x 1/4" 90° Elbow $6.56
1/4" x 1/4" x 1/4" Tee $6.69
1/4" x 1/2" Mips Male Adapter
NOT FOR potable / drinking water
$7.60
while supplies last
1/4" x 3/8" Mips Male Adapter $9.89
Description Price & Quantity
1/4" x 1/4" In-Line Globe Shut-off Valve $15.50
1/4" Nut $1.08
1/4" Grip Ring $0.92
1/4" Cone $0.46

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3/8" Repair Fittings

Description Price & Quantity
3/8" x 1/4" Coupling $6.57
3/8" x 3/8" Coupling $5.16
3/8" x 3/8" 90° Elbow $6.77
3/8" x 3/8" Mips 90° Male Elbow
NOT FOR potable / drinking water
$5.35
while supplies last
3/8" x 3/8" Mips 90° Male Elbow $6.69
3/8" x 1/2 Fips 90° Female Elbow $5.76
3/8" x 1/4" x 1/4" Tee $6.84
3/8" x 3/8" x 1/4" Tee $6.84
3/8" x 3/8" x 3/8" Tee $7.53
3/8" x 3/8" x 1/2" Tee $8.17
Description Price & Quantity
3/8" x 3/8" Mips Male Adapter
NOT FOR potable / drinking water
$10.71
while supplies last
3/8" x 1/2" Mips Male Adapter $7.43
3/8" x 3/8" OD (1/4" N) Straight Stop Valve
includes 2 each: nut, cone, & grip ring
$10.40
3/8" x 1/2" OD (3/8" N) Straight Stop Valve
includes 2 each: nut, cone, & grip ring
$10.46
3/8" x 3/8" In-Line Globe Shut-off Valve
includes 2 each: nut, cone, & grip ring
$15.98
3/8" Nut $1.13
3/8" Grip Ring $0.95
3/8" Cone $0.48
3/8" Copper Crimp Ring $0.44

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1/2" Repair Fittings

Description Price & Quantity
1/2" x 1/4" Coupling $8.90
1/2" x 3/8" Coupling $8.95
1/2" x 1/2" Coupling $5.91
1/2" x 1/2" 90° Elbow $8.12
1/2" x 3/8" Mips 90° Male Elbow
NOT FOR potable / drinking water
$5.90
while supplies last
1/2" x 3/8" Mips 90° Male Elbow $6.84
1/2" x 1/2" Mips 90° Male Elbow $7.15
1/2" x 1/2" Fips 90° Female Elbow $6.74
1/2" x 1/2 Fips Drop Ear 90° Female Elbow $7.99
1/2" x 3/4" Fips Drop Ear 90° Female Elbow $9.91
1/2" x 3/8" x 3/8" Tee $9.25
1/2" x 3/8" x 1/2" Tee $10.85
1/2" x 1/2" x 1/4" Tee $9.10
1/2" x 1/2" x 3/8" Tee $9.22
1/2" x 1/2" x 1/2" Tee $8.61
1/2" N x 3/8" Mips Male Adapter
NOT FOR potable / drinking water
$8.83
while supplies last
1/2" N x 1/2" Mips Male Adapter $9.02
1/2" N x 3/4" Mips Male Adapter $8.41
1/2" N x 1/2" Fips Female Adapter $6.11
1/2" N x 3/4" Fips Female Adapter $7.96
1/2" Fips x 1/2" Fips Female Coupling $2.29
1/2" FPT x 1/2" MPT Angle Stop Valve
stop valve only
$6.60
1/2" FPT x 3/8" OD (1/4" Nom.)
Angle Stop Valve

includes 1 each: nut, cone, & grip ring
$7.41
1/2" FPT x 1/2" OD (3/8" Nom.)
Angle Stop Valve

includes 1 each: nut, cone, & grip ring
$7.41
Description Price & Quantity
1/2" N x 3/8" OD (1/4" Nom.)
Angle Stop Valve

includes 2 each: nut, cone, & grip ring
$8.48
1/2" N x 1/2" OD (3/8" Nom)
Angle Stop Valve

includes 2 each: nut, cone, & grip ring
$8.56
1/2" FPT x 1/2" MPT Straight Stop Valve
stop valve only
$7.68
1/2" MPT x 1/2" MPT Straight Stop Valve
stop valve only
$7.44
1/2" FPT x 3/8" OD (1/4" N)
Straight Stop Valve

includes 1 each: nut, cone, & grip ring
$9.46
1/2" FPT x 1/2" OD (3/8" N)
Straight Stop Valve

includes 1 each: nut, cone, & grip ring
$9.28
1/2" N x 3/8" OD (1/4" N)
Straight Stop Valve

includes 2 each: nut, cone, & grip ring
$10.60
1/2" N x 1/2" OD (3/8" N)
Straight Stop Valve

includes 2 each: nut, cone, & grip ring
$10.66
1/2" N x 1/2" N
In-Line Globe Shut-off Valve

includes 2 each: nut, cone, & grip ring
$16.08
1/2" MPT x 1/2" MPT
In-Line Globe Shut-off Valve

stop valve only
$12.39
1/2" Cap $1.60
1/2" Nut $1.28
1/2" Grip Ring $0.96
1/2" Cone $0.60
1/2" Copper Crimp Ring $0.63
1/2" Crimp Style Elbow $3.83
1/2" Crimp Style Tee $5.81
1/2" Crimp Style Coupling $2.69
1/2" x 1/2" MIPS Crimp Male Adapter
NOT FOR potable / drinking water
$4.99
while supplies last

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3/4" Repair Fittings

Description Price & Quantity
3/4" x 1/2" Coupling $8.22
3/4" x 3/4" Coupling $8.32
3/4" x 1/2" 90° Elbow $11.04
3/4" x 3/4" 90° Elbow $10.96
3/4" x 3/4" 90° Male Elbow
NOT FOR potable / drinking water
$6.42
while supplies last
3/4" x 3/4" 90° Male Elbow $11.42
3/4" x 3/4" Fips Drop Ear 90° Female Elbow $10.93
3/4" x 1/2" x 1/2" Tee $11.84
3/4" x 1/2" x 3/4" Tee $16.82
3/4" x 3/4" x 1/2" Tee $12.09
3/4" x 3/4" x 3/4" Tee $11.11
3/4" N x 1/2" Mips Male Adapter $13.23
3/4" N x 3/4" Mips Male Adapter $15.60
3/4" N x 1" Mips Male Adapter $16.22
3/4" N x 3/4" Fips Female Adapter $7.88
Description Price & Quantity
3/4" N x 1" Fips Female Adapter $9.64
3/4" Fips x 3/4" Fips Female Coupling $3.17
3/4" MPT x 1/2" MPT Straight Stop Valve
stop valve only
$7.48
3/4" N x 3/4" N
In-Line Globe Shut-off Valve

includes 2 each: nut, cone, & grip ring
$20.42
3/4" MPT x 3/4" MPT
In-Line Globe Shut-off Valve

stop valve only
$12.52
3/4" Cap $1.92
3/4" Nut $2.43
3/4" Grip Ring $0.99
3/4" Cone $0.62
3/4" Copper Crimp Ring $0.83
3/4" Crimp Style Elbow $4.63
3/4" Crimp Style Tee $8.02
3/4" Crimp Style Coupling $3.16

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1" Repair Fittings

Description Price & Quantity
1" x 3/4" Coupling $10.47
1" x 1" Coupling $10.53
1" x 1/2" 90° Elbow $12.95
1" x 3/4" 90° Elbow $13.89
1" x 1" 90° Elbow $14.48
1" x 3/4" x 1/2" Tee $15.44
1" x 3/4" x 3/4" Tee $16.31
1" x 3/4" x 1" Tee $16.11
1" x 1" x 3/4" Tee $14.55
1" x 1" x 1" Tee $14.72
Description Price & Quantity
1" N x 1" Mips Male Adapter $26.55
1" N x 3/4" Fips Female Adapter $10.32
1" N x 1" Fips Female Adapter $10.74
1" Fips x 1" Fips Female Coupling $4.47
1" MPT x 1" MPT
In-Line Globe Shut-off Valve

stop valve only
$13.79
1" Nut $2.81
1" Grip Ring $1.02
1" Cone $0.68
1" Copper Crimp Ring $1.09

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Related Items & Accessories:


Frequently Asked Questions

Q. "I purchased some 1/2" and 3/4" pipe, but I'm not sure how loose or tight they should be. How should I tighten the nuts on the couplings?"
A. Tighten until they squeak, and turn a 1/4 turn more. Don't over tighten, and you'll have a connection that will last trouble free for many years and can easily be taken apart and reused.

Q. "Can I use the above fittings to mix copper, PEX and Polybutylene pipe?"
A. The above Qest acetal fittings fit over copper, cpvc, PEX (crosslinked polyethylene) and Polybutylene pipe. They have a stainless crimp fitting and an acetal compression sleeve that fit over any of those pipes. You can have copper on one side and cpvc on the other side of the fitting, etc. They are very easy to use. They are more bulky than the old insert fittings and for tight places they might not fit or work.

Q. "I get confused about CPVC sizes. What type of CPVC pipe do these fittings fit?"
A. There are two "standard" sizes in CPVC, and this can be confusing. There is the size that matches the outside diameter of copper, which is called "CTS-sized". This is the type of CPVC that we offer, and that's the size that these QEST fittings will fit. With these fittings, you simply add 1/8" to the fitting size to determine the outside diameter of the pipe that will fit. (For instance, a 1/2" QEST fitting will fit CPVC pipe that has a 5/8" outside diameter.) PLEASE NOTE: The other type of CPVC pipe is the same size as steel pipe, which is known as "IPS-sized"; these QEST fittings will NOT compress onto IPS-sized pipe.

Q. "What does Nominal mean?"
A. "Nominal" refers to the inside diameter of the pipe, which varies by thickness of the pipe. The outside is a constant size and is always 1/8" larger than the nominal size. Example: 1/2" nominal is always 5/8" O.D. (Outside Diameter)

Nominal Size To OD Size Conversion Table
O.D. Of Pipe 1/4" 3/8" 1/2" 5/8" 7/8" 1-1/8" 1-3/8" 1-5/8" 2-1/8"
Nominal Pipe Size 1/8" 1/4" 3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2" 2"

Q. "How do crimp fittings work?"
A. Crimp fittings consist of two pieces: a male piece that fits inside the tubing and a crimp ring that fits over the tubing. A tool is used to crimp the ring onto the male fitting inside the tubing. This creates a permanent water/air tight seal with the tubing being captured between the two pieces.

Q. "Will your PEX crimp fittings work with my Polybutylene pipe?"
A. The crimp fittings we sell are made for use with plastic pipe that is Copper Tube Size (CTS), such as PEX. Since polybutylene has been discontinued since 1995, we cannot guarantee that these fittings will work on polybutylene pipe. If your pipe is CTS, these fittings may work, but we can only say for sure that these fittings will work on PEX and other CTS plastic pipe.

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