John Guest Fittings and Accessories

We carry a large inventory of 1/4" & 3/8" fittings, valves & tubing. Recently John Guest expanded their line of White Polypropylene Fittings. These fittings and their o-rings are more resistant to chemical degradation than the Gray Acetal Fittings.

We offer a large selection of both the Polypropylene & Acetal Fittings. Either will work in most applications.

John Guest T-fittings are available in 3 sizes. Most refrigerator and icemaker water lines are 1/4".

View all the John Guest Products we offer.

John Guest Valves
John Guest Valves John Guest Fittings
John Guest Fittings John Guest CTS Fittings
John Guest CTS Fittings John Guest Tubing
John Guest
Tubing Organic Fittings
Organic Fittings Installation Accessories
Installation Accessories
Nipples
Mounting Brackets
Pressure Reducing Valves Connection Kits
Connection Kits

Union Elbows - Equal Elbow Connectors

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Union Elbows - Equal Elbow Connectors
John Guest 1/4" Union Elbow (White Polypropylene)
PP0308W
John Guest 1/4" Union Elbow (White Polypropylene)
Qty:
John Guest 3/8" Union Elbow (White Polypropylene)
PP0312W
John Guest 3/8" Union Elbow (White Polypropylene)
Qty:
John Guest 1/4" Union Elbow (Acetal)
PI0308S
John Guest 1/4" Union Elbow (Acetal)
Qty:
John Guest 3/8" Union Elbow (Acetal)
PI0312S
John Guest 3/8" Union Elbow (Acetal)
Qty:
John Guest 1/2" Union Elbow (Acetal)
PI0316S
John Guest 1/2" Union Elbow (Acetal)
Qty:

Union Connectors - Equal Straight Connectors

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Union Connectors - Equal Straight Connectors
John Guest 1/4" (OD) Straight Union Connector (White Polypropylene)
PP0408W
John Guest 1/4" (OD) Straight Union Connector (White Polypropylene)
Qty:
John Guest 3/8" (OD) Straight Union Connector (White Polypropylene)
PP0412W
John Guest 3/8" (OD) Straight Union Connector (White Polypropylene)
Qty:
John Guest 1/4" (OD) Straight Union Connector (Acetal)
PI0408S
John Guest 1/4" (OD) Straight Union Connector (Acetal)
Qty:
John Guest 3/8" (OD) Straight Union Connector (Acetal)
PI0412S
John Guest 3/8" (OD) Straight Union Connector (Acetal)
Qty:
John Guest 1/2" (OD) Straight Union Connector (Acetal)
PI0416S
John Guest 1/2" (OD) Straight Union Connector (Acetal)
Qty:

Reducing Unions - Reducing Straight Connectors

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Reducing Unions - Reducing Straight Connectors
John Guest 3/8" x 1/4" Reducing Union (Polypropylene)
PP201208W
John Guest 3/8" x 1/4" Reducing Union (Polypropylene)
Qty:
John Guest 3/8" x 1/4" Reducing Union (Acetal)
PI201208S
John Guest 3/8" x 1/4" Reducing Union (Acetal)
Qty:
John Guest 3/8" x 5/16" Reducing Union (Acetal)
PI201210S
John Guest 3/8" x 5/16" Reducing Union (Acetal)
Qty:
John Guest 1/2" x 3/8" Reducing Union (Acetal)
PI201612S
John Guest 1/2" x 3/8" Reducing Union (Acetal)
Qty:

Union Tees - Equal Tees

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Union Tees - Equal Tees
John Guest 1/4" Union Tee (White Polypropylene)
PP0208W
John Guest 1/4" Union Tee (White Polypropylene)
Qty:
John Guest 3/8" Union Tee (White Polypropylene)
PP0212W
John Guest 3/8" Union Tee (White Polypropylene)
Qty:
John Guest 1/2" Union Tee (White Polypropylene)
PP0216W
John Guest 1/2" Union Tee (White Polypropylene)
Qty:
John Guest 1/4" Union Tee (Acetal)
PI0208S
John Guest 1/4" Union Tee (Acetal)
Qty:
John Guest 3/8" Union Tee (Acetal)
PI0212S
John Guest 3/8" Union Tee (Acetal)
Qty:
John Guest 1/2" Union Tee (Acetal)
PI0216S
John Guest 1/2" Union Tee (Acetal)
Qty:

Equal Cross Connectors

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Equal Cross Connectors
John Guest 3/8" (OD) Equal Cross Connector
PI4712S
John Guest 3/8" (OD) Equal Cross Connector
Qty:

Reducing Branch Tees - Reducing Tees

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Reducing Branch Tees - Reducing Tees
John Guest 3/8" x 3/8" x 1/4" Reducing Branch Tee (Acetal)
PI301208S
John Guest 3/8" x 3/8" x 1/4" Reducing Branch Tee (Acetal)
Qty:
John Guest 1/2" x 1/2" x 3/8" Reducing Branch Tee (Acetal)
PI301612S
John Guest 1/2" x 1/2" x 3/8" Reducing Branch Tee (Acetal)
Qty:

Reducing Elbows

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Reducing Elbows
John Guest 3/8" x 1/4" Reducing Elbow (Acetal)
PI211208S
John Guest 3/8" x 1/4" Reducing Elbow (Acetal)
Qty:

Male Connectors - Straight Adaptors

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Male Connectors - Straight Adaptors
John Guest 1/4" x 1/8" NPTF Male Connector (White Polypropylene)
PP010821W
John Guest 1/4" x 1/8" NPTF Male Connector (White Polypropylene)
Qty:
John Guest 1/4" x 1/4" NPTF Male Connector (White Polypropylene)
PP010822W
John Guest 1/4" x 1/4" NPTF Male Connector (White Polypropylene)
Qty:
John Guest 1/4" x 3/8" NPTF Male Connector (White Polypropylene)
PP010823W
John Guest 1/4" x 3/8" NPTF Male Connector (White Polypropylene)
Qty:
John Guest 3/8" x 1/4" NPTF Male Connector (White Polypropylene)
PP011222W
John Guest 3/8" x 1/4" NPTF Male Connector (White Polypropylene)
Qty:
John Guest 3/8" x 3/8" NPTF Male Connector (White Polypropylene)
PP011223W
John Guest 3/8" x 3/8" NPTF Male Connector (White Polypropylene)
Qty:
John Guest 1/2" x 3/8" NPTF Male Connector (White Polypropylene)
PP011623W
John Guest 1/2" x 3/8" NPTF Male Connector (White Polypropylene)
Qty:
John Guest 1/4" x 1/4" NPTF Male Connector (Acetal)
PI010822S
John Guest 1/4" x 1/4" NPTF Male Connector (Acetal)
Qty:
John Guest 1/4" x 3/8" NPTF Male Connector (Acetal)
PI010823S
John Guest 1/4" x 3/8" NPTF Male Connector (Acetal)
Qty:
John Guest 3/8" x 1/4" NPTF Male Connector (Acetal)
PI011222S
John Guest 3/8" x 1/4" NPTF Male Connector (Acetal)
Qty:
John Guest 3/8" x 3/8" NPTF Male Connector (Acetal)
PI011223S
John Guest 3/8" x 3/8" NPTF Male Connector (Acetal)
Qty:
John Guest 3/8" x 1/2" NPTF Male Connector (Acetal)
PI011224S
John Guest 3/8" x 1/2" NPTF Male Connector (Acetal)
Qty:
John Guest 1/2" x 1/2" NPTF Male Connector (Acetal)
PI011624S
John Guest 1/2" x 1/2" NPTF Male Connector (Acetal)
Qty:

Fixed Elbows - Rigid Elbow Adaptors

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Fixed Elbows - Rigid Elbow Adaptors
John Guest 1/4" OD x 1/8" NPTF Fixed Elbow (White Polypropylene)
PP480821W
John Guest 1/4" OD x 1/8" NPTF Fixed Elbow (White Polypropylene)
Qty:
John Guest 1/4" OD x 1/4" NPTF Fixed Elbow (White Polypropylene)
PP480822W
John Guest 1/4" OD x 1/4" NPTF Fixed Elbow (White Polypropylene)
Qty:
John Guest 1/4" OD x 3/8" NPTF Fixed Elbow (White Polypropylene)
PP480823W
John Guest 1/4" OD x 3/8" NPTF Fixed Elbow (White Polypropylene)
Qty:
John Guest 3/8" OD x 1/4" NPTF Fixed Elbow (White Polypropylene)
PP481222W
John Guest 3/8" OD x 1/4" NPTF Fixed Elbow (White Polypropylene)
Qty:
John Guest 3/8" OD x 3/8" NPTF Fixed Elbow (White Polypropylene)
PP481223W
John Guest 3/8" OD x 3/8" NPTF Fixed Elbow (White Polypropylene)
Qty:
John Guest 1/4" OD x 1/8" NPTF Fixed Elbow (Acetal)
PI480821S
John Guest 1/4" OD x 1/8" NPTF Fixed Elbow (Acetal)
Qty:
John Guest 1/4" OD x 1/4" NPTF Fixed Elbow (Acetal)
PI480822S
John Guest 1/4" OD x 1/4" NPTF Fixed Elbow (Acetal)
Qty:
John Guest 1/4" OD x 3/8" NPTF Fixed Elbow (Acetal)
PI480823S
John Guest 1/4" OD x 3/8" NPTF Fixed Elbow (Acetal)
Qty:
John Guest 3/8" OD x 1/4" NPTF Fixed Elbow (Acetal)
PI481222S
John Guest 3/8" OD x 1/4" NPTF Fixed Elbow (Acetal)
Qty:
John Guest 3/8" OD x 3/8" NPTF Fixed Elbow (Acetal)
PI481223S
John Guest 3/8" OD x 3/8" NPTF Fixed Elbow (Acetal)
Qty:

Flow Restrictors

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Flow Restrictors
John Guest 1/4" JG x 3/8" NPTF Male Connector w/ 0.5 GPM Flow Restrictor
FRC-.5GPM-PI010823S
John Guest 1/4" JG x 3/8" NPTF Male Connector w/ 0.5 GPM Flow Restrictor
Qty:
John Guest 1/4" JG × 3/8" NPTF Male Connector with 1 GPM Flow Restrictor
FRC-1GPM-PI010823S
John Guest 1/4" JG × 3/8" NPTF Male Connector with 1 GPM Flow Restrictor
Qty:

Tube to Hose Stem

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Tube to Hose Stem
John Guest 1/4" Tube to 1/4" Hose Stem (Acetal)
PI250808S
John Guest 1/4" Tube to 1/4" Hose Stem (Acetal)
Qty:

Plug-In Elbows - Stem Elbows

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Plug-In Elbows - Stem Elbows
John Guest 1/4" x 1/4" Plug-In Elbow (White Polypropylene)
PP220808W
John Guest 1/4" x 1/4" Plug-In Elbow (White Polypropylene)
Qty:
John Guest 3/8" x 1/4" Plug-In Elbow (White Polypropylene)
PP221208W
John Guest 3/8" x 1/4" Plug-In Elbow (White Polypropylene)
Qty:
John Guest 3/8" x 3/8" Plug-In Elbow (White Polypropylene)
PP221212W
John Guest 3/8" x 3/8" Plug-In Elbow (White Polypropylene)
Qty:
John Guest 1/4" x 1/4" Plug-In Elbow (Acetal)
PI220808S
John Guest 1/4" x 1/4" Plug-In Elbow (Acetal)
Qty:

Plugs

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Plugs
John Guest 1/4" Plug
PI0808S
John Guest 1/4" Plug
Qty:
John Guest 3/8" Plug
PI0812S
John Guest 3/8" Plug
Qty:
John Guest 1/2" Plug
PI0816S
John Guest 1/2" Plug
Qty:

Reducers

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Reducers
John Guest 3/8" Stem OD x 1/4" Tube OD JG Reducer
PP061208W
John Guest 3/8" Stem OD x 1/4" Tube OD JG Reducer
Qty:

Faucet Connectors

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Faucet Connectors
John Guest 1/4" JG x 7/16" Faucet Connector
CI3208U7S
John Guest 1/4" JG x 7/16" Faucet Connector
Qty:
John Guest 3/8" JG x 7/16" Faucet Connector
CI3212U7S
John Guest 3/8" JG x 7/16" Faucet Connector
Qty:

Female Adaptors

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Female Adaptors
John Guest 1/4
PP450822W
John Guest 1/4" FNPT x 1/4" OD Female Adaptor
Qty:

Stem Adaptors

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Stem Adaptors
John Guest 1/4" Tube x 1/4" NPTF Stem Adaptor
PP050822W
John Guest 1/4" Tube x 1/4" NPTF Stem Adaptor
Qty:
John Guest 3/8" Tube x 1/4" NPTF Stem Adaptor
PP051222W
John Guest 3/8" Tube x 1/4" NPTF Stem Adaptor
Qty:
John Guest 3/8" Tube x 3/8" NPTF Stem Adaptor
PP051223W
John Guest 3/8" Tube x 3/8" NPTF Stem Adaptor
Qty:
John Guest 3/8" Tube x 1/4" NPTF Stem Adaptor (Acetal)
PI051222S
John Guest 3/8" Tube x 1/4" NPTF Stem Adaptor (Acetal)
Qty:
John Guest 1/4" Tube x 1/4" NPTF Stem Adaptor (Acetal)
PI050822S
John Guest 1/4" Tube x 1/4" NPTF Stem Adaptor (Acetal)
Qty:

End Stops

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. End Stops
John Guest 1/4" End Stop
PI4608S
John Guest 1/4" End Stop
Qty:
John Guest 3/8" End Stop
PI4612S
John Guest 3/8" End Stop
Qty:

Bulkhead Unions - Bulkhead Connectors

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Bulkhead Unions - Bulkhead Connectors
John Guest 1/4" x 1/4" Bulkhead Union (Polypropylene)
PP1208W
John Guest 1/4" x 1/4" Bulkhead Union (Polypropylene)
  •   Out of stock
John Guest 3/8" × 3/8" Bulkhead Union (Polypropylene)
PP1212W
John Guest 3/8" × 3/8" Bulkhead Union (Polypropylene)
Qty:
John Guest 1/4" x 1/4" Bulkhead Union (Acetal)
PI1208S
John Guest 1/4" x 1/4" Bulkhead Union (Acetal)
Qty:
John Guest 3/8" × 3/8" Bulkhead Union (Acetal)
PI1212S
John Guest 3/8" × 3/8" Bulkhead Union (Acetal)
Qty:

Locking Clips

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Fittings
  5. Locking Clips
John Guest 1/4" Locking Clip
PIC1808R
John Guest 1/4" Locking Clip
Qty:
John Guest 3/8" Locking Clip
PIC1812R
John Guest 3/8" Locking Clip
Qty:
John Guest 1/2" Locking Clip
PIC1816R
John Guest 1/2" Locking Clip
Qty:

John Guest CTS Connectors

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest CTS Fittings
  5. John Guest CTS Connectors
John Guest 1" CTS (OD) Straight Union Connector (Black Polypropylene)
PEI0436E
John Guest 1" CTS (OD) Straight Union Connector (Black Polypropylene)
Qty:
  • Price:$9.60
John Guest 3/4" CTS x 3/4" NPT Female Connector
PSEI452826
John Guest 3/4" CTS x 3/4" NPT Female Connector
Qty:
  • Price:$6.00
John Guest 1" CTS x 1" NPT Male Connector (Black Polypropylene)
PSEI013628E
John Guest 1" CTS x 1" NPT Male Connector (Black Polypropylene)
Qty:
  • Price:$7.75

John Guest CTS Valves

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest CTS Fittings
  5. John Guest CTS Valves
John Guest 3/4" x 3/4" CTS Straight Ball Shut-off Valve
PSEISV28P
John Guest 3/4" x 3/4" CTS Straight Ball Shut-off Valve
Qty:
  • Price:$10.00

John Guest CTS Elbows

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest CTS Fittings
  5. John Guest CTS Elbows
John Guest 3/4" CTS × 3/4" Plug-In Elbow (White Polypropylene)
PEI222828
John Guest 3/4" CTS × 3/4" Plug-In Elbow (White Polypropylene)
Qty:
  • Price:$2.50

John Guest CTS Tees

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest CTS Fittings
  5. John Guest CTS Tees
John Guest 1" x 1" x 3/4" CTS Branch Reducing Branch Tee (White Polypropylene)
PEI3036A
John Guest 1" x 1" x 3/4" CTS Branch Reducing Branch Tee (White Polypropylene)
Qty:
  • Price:$5.00
John Guest 3/4" x 3/4" x 3/4" CTS Union Tee (Black Polypropylene)
PEI0228E
John Guest 3/4" x 3/4" x 3/4" CTS Union Tee (Black Polypropylene)
Qty:
  • Price:$5.00
John Guest 1" x 1" x 1" CTS Union Tee (White Polypropylene)
PEI0236
John Guest 1" x 1" x 1" CTS Union Tee (White Polypropylene)
Qty:
  • Price:$8.00

John Guest CTS Reducers

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest CTS Fittings
  5. John Guest CTS Reducers
John Guest 3/4" x 1/2" CTS Reducer (White Polypropylene)
PEI062820
John Guest 3/4" x 1/2" CTS Reducer (White Polypropylene)
Qty:
  • Price:$3.00
John Guest 1" x 3/4" CTS Reducer (White Polypropylene)
PEI063628
John Guest 1" x 3/4" CTS Reducer (White Polypropylene)
Qty:
  • Price:$5.60

John Guest Accessories

john-guest Logo
  1. Fittings, Kits & Tubing
  2. Fittings, Valves & Tubing
  3. John Guest Fittings and Accessories
  4. John Guest Accessories
John Guest Collet Release Tool - Not Required to Release Connection
TSPITOOL
John Guest Collet Release Tool - Not Required to Release Connection
Qty:
  • Price:$1.25
John Guest Tube Cutter
TSNIP
John Guest Tube Cutter
Qty:
  • Price:$8.00
John Guest Tube Cutter Replacement Blades
BLADES
John Guest Tube Cutter Replacement Blades
Qty:
  • Price:$2.50