John Guest Products
swtwater.com PI Inch Acetal Fittings
John Guest PI Range of Inch-Size Acetal Fittings
 
NSF International Standard 51 and 61.
 
 
All PI Inch Fittings are produced in Food and Drug Administration (FDA) approved materials and are therefore recommended for food quality applications.
  
   
PI Inch Fittings are manufactured in gray acetal copolymer with food grade nitrile O-rings, making them especially suitable for applications involving foodstuffs or potable liquids. They are also suitable for air and inert gases and can therefore be used on CO2 lines, pneumatic applications, and vacuum.

All PI Inch Fittings are Lead Free.

Working Pressures and Temperatures
5/32 to 5/16 inch fittings (4mm to 8mm)
Water: Max. 230 psi at 73°F (max. 16 bar at 23°C)
Max. 150 psi at 158°F (max. 10 bar at 70°C)
Min. 33°F (1°C)
Air: Max. 230 psi at –4°F (max. 16 bar at –20°C)
3/8 to 1/2 inch fittings (10mm to 22mm)
Water: Max. 150 psi at 73°F (max. 10 bar at 23°C)
Max. 100 psi at 158°F (max. 7 bar at 70°C)
Min. 33°F (1°C)
Air: Max. 150 psi at –4°F (max. 10 bar at –20°C)
 
Male Connector — NPTF Thread
Male Connector - NPTF Thread
Part
Number		 Tube
OD		 Thread
NPTF
PM010421S 5/32 1/8
PM010422S 5/32 1/4
PI010621S 3/16 1/8
PI010821S 1/4 1/8
PI010822S 1/4 1/4
PI010823S 1/4 3/8
PM010821S 5/16 1/8
PM010822S 5/16 1/4
PM010823S 5/16 3/8
PI011221S 3/8 1/8
PI011222S 3/8 1/4
PI011223S 3/8 3/8
PI011224S 3/8 1/2
PI011623S 1/2 3/8
PI011624S 1/2 1/2
PI012026S 5/8 3/4
 
Male Connector — BSPT Thread
Male Connector - BSPT Thread
Part
Number		 Tube
OD		 Thread
BSPT
PM010401S 5/32 1/8
PM010402S 5/32 1/4
PI010601S 3/16 1/8
PI010602S 3/16 1/4
PI010801S 1/4 1/8
PI010802S 1/4 1/4
PM010801S 5/16 1/8
PM010802S 5/16 1/4
PM010803S 5/16 3/8
PI011202S 3/8 1/4
PI011203S 3/8 3/8
PI011603S 1/2 3/8
PI011604S 1/2 1/2
 
Male Connector — BSPP Thread
Male Connector - BSPP Thread
Part
Number		 Tube
OD		 Thread
BSPP
PI010812S 1/4 1/4
PI011212S 3/8 1/4
PI011213S 3/8 3/8
 
Male Connector — BSPP Thread
Male Connector - BSPP Thread
Part
Number		 Tube
OD		 Thread
BSPP
NCPI011211S 3/8 1/8
NCPI011212S 3/8 1/4

3/8" x 1/4" has special large seal for use with chamfered face ports.
No thread seal on 3/8" x 1/8".
 
Male Flare Connector — MFL Thread
Male Flare Connector - MFL Thread   45° FLARE
Part
Number		 Tube
OD 		Thread
MFL
PI0108F4S 1/4 1/4
PM0108F5S 5/16 5/16
PI0112F4S 3/8 1/4
PI0112F5S 3/8 5/16
PI0112F6S 3/8 3/8
PI0112F8S 3/8 1/2
PI0116F8S 1/2 1/2
PM0108C5S 5/16 1/2-16UN
PI0112C5S 3/8 1/2-16UN

1/4 MFL = 7/16-20 UNF
5/16 MFL = 1/2-20 UNF
3/8 MFL = 5/8-18 UNF
1/2 MFL = 3/4-16 UNF
 
Female Connector — BSP Thread
Female Connector - NPTF Thread
Part
Number		 Tube
OD		 Thread
BSP
CI320816FS 1/4 3/4
CI321216FS 3/8 3/4

Not suitable for air.
 
Female Connector — NPTF Thread
Female Connector - NPTF Thread Female Connector drawing - NPTF Thread
Part
Number		 Tube
OD		 Thread
NPTF
PI450822S 1/4 1/4
PI451222S 3/8 1/4
 
Female Connector — UN Thread
Female Connector - UN Thread Female Connector drawing - UN Thread
Part
Number		 Tube
OD		 Thread
UN
PM4508C5S 5/16 1/2-16
PI4512C5S 3/8 1/2-16
PI4516C5S 1/2 1/2-16

Unified Thread (UN) is generally used in beverage dispense applications, usually associated with Coca Cola.
 
Female Cone End Connector — BSPP Thread
Female Cone End Connector - BSPP Thread Female Cone End Connector drawing - BSPP Thread
Part
Number		 Tube
OD 		Thread
BSPP
PI451014CS 5/16 1/2
PI451015CS 5/16 5/8
PI451214CS 3/8 1/2
PI451215CS 3/8 5/8
PI451614CS 1/2 1/2
PI451616CS 1/2 3/4
 
Female Flat End Connector — BSPP Thread
Female Flat End Connector - BSPP Thread Female Flat End Connector drawing - BSPP Thread
Part
Number		 Tube
OD		 Thread
BSPP
PI451014FS 5/16 1/2
PI451015FS 5/16 5/8
PI451213S 3/8 3/8
PI451214FS 3/8 1/2
PI451215FS 3/8 5/8
PI451613S 1/2 3/8
PI451615FS 1/2 5/8
 
Female Flare Connector — FFL Thread
Female Flare Connector - FFL Thread Female Flare Connector drawing - FFL Thread
   45° FLARE
Part
Number		 Tube
OD		 Thread
FFL
PM4508F4S 5/16 1/4
PI4512F4S 3/8 1/4
PI4512F6S 3/8 3/8

1/4 FFL = 7/16-20 UNF
3/8 FFL = 5/8-18 UNF
 
Faucet Connector — BSPP Thread
Faucet Connector - BSPP Thread Faucet Connector drawing - BSPP Thread
Part
Number		 Tube
OD		 Thread
BSPP
CI320814S 1/4 1/2
CI320816S 1/4 3/4
CI321214S 3/8 1/2
CI321216S 3/8 3/4

Not suitable for air.
 
Faucet Connector — UNS Thread
Faucet Connector - UNS Thread Faucet Connector drawing - UNS Thread
Part
Number		 Tube
OD		 Thread
UNS
CI3208U7S 1/4 7/16-24
CI3210U7S 5/16 7/16-24
CI3212U7S 3/8 7/16-24

Not suitable for air.
7/16-24 UNS = 1/4 Compression Threads
 
Union Connector
Union Connector
Part
Number		 Tube
OD		 Tube
OD
PM0404S 5/32 5/32
PI0406S 3/16 3/16
PI0408S 1/4 1/4
PM0408S 5/16 5/16
PI0412S 3/8 3/8
PI0416S 1/2 1/2
 
Reducing Union Connector
Reducing Union Connector
Part
Number		 Tube
OD		 Tube
OD
PI200806S 1/4 3/16
PM200804S 5/16 5/32
PI201006S 5/16 3/16
PI201008S 5/16 1/4
PI201206S 3/8 3/16
PI201208S 3/8 1/4
PI201210S 3/8 5/16
PI201608S 1/2 1/4
PI201610S 1/2 5/16
PI201612S 1/2 3/8
 
Reducer
Reducer
Part
Number		 Stem
OD		 Tube
OD
PI060605S 3/16 5/32
PI061006S 5/16 3/16
PI061008S 5/16 1/4
PI061206S 3/8 3/16
PI061208S 3/8 1/4
PI061210S 3/8 5/16
PI061610S 1/2 5/16
PI061612S 1/2 3/8
 
Enlarger
Enlarger
Part
Number		 Stem
OD		 Tube
OD
PI131012S 5/16 3/8
PI131216S 3/8 1/2
 
Plug
Plug
Part
Number		 Stem
OD
PM0804S 5/32
PI0806S 3/16
PI0808S 1/4
PM0808S 5/16
PI0812S 3/8
PI0816S 1/2
 
End Stop
End Stop
Part
Number		 Tube
OD
PI4608S 1/4
PI4612S 3/8
 
Stem Adapter — NPTF Thread
Stem Adapter - NPTF Thread
Part
Number		 Stem
OD		 Thread
NPTF
PM050421S 5/32 1/8
PM050422S 5/32 1/4
PI050621S 3/16 1/8
PI050821S 1/4 1/8
PI050822S 1/4 1/4
PI050823S 1/4 3/8
PM050821S 5/16 1/8
PM050822S 5/16 1/4
PM050823S 5/16 3/8
PI051222S 3/8 1/4
PI051223S 3/8 3/8
PI051623S 1/2 3/8
PI051624S 1/2 1/2
 
Stem Adapter — BSPT Thread
Stem Adapter - BSPT Thread
Part
Number		 Stem
OD		 Thread
BSPT
PI050601S 3/16 1/8
PI050801S 1/4 1/8
PI050802S 1/4 1/4
PM050801S 5/16 1/8
PM050802S 5/16 1/4
PM050803S 5/16 3/8
PI051202S 3/8 1/4
PI051203S 3/8 3/8
PI051603S 1/2 3/8
PI051604S 1/2 1/2
 
Stem Adapter — BSPP Thread
Stem Adapter - BSPP Thread
Part
Number		 Stem
OD		 Thread
BSPP
PM050812S 5/16 1/4
PI051212S 3/8 1/4
PI051213S 3/8 3/8
 
Outlet Adapter— BSPP Thread
Male Connector - BSPP Thread
Part
Number		 Tube
OD		 Thread
BSPP
NC128/I12 3/8 1/4
 
Union Tee
Union Tee
Part
Number		 Tube
OD		 Tube
OD
PM0204S 5/32 5/32
PI0206S 3/16 3/16
PI0208S 1/4 1/4
PM0208S 5/16 5/16
PI0212S 3/8 3/8
PI0216S 1/2 1/2
 
Union Elbow
Union Elbow
Part
Number		 Tube
OD		 Tube
OD
PM0304S 5/32 5/32
PI0306S 3/16 3/16
PI0308S 1/4 1/4
PI0308S-B 1/4 1/4
PM0308S 5/16 5/16
PI0312S 3/8 3/8
PI0316S 1/2 1/2

NOTE: PI0308S-B has blue collet.
 
Reducing Elbow
Reducing Elbow
Part
Number		 Tube
OD		 Tube
OD
PM210804S 5/16 5/32
PI211006S 5/16 3/16
PI211008S 5/16 1/4
PI211206S 3/8 3/16
PI211208S 3/8 1/4
PI211210S 3/8 5/16
PI211610S 1/2 5/16
PI211612S 1/2 3/8
 
Fixed Elbow — NPTF Thread
Fixed Elbow - NPTF Thread
Part
Number		 Tube
OD		 Thread
NPTF
PI480821S 1/4 1/8
PI480822S 1/4 1/4
PI480823S 1/4 3/8
PI481022S 5/16 1/4
PI481023S 5/16 3/8
PI481222S 3/8 1/4
PI481223S 3/8 3/8
PI482024S 5/8 1/2
 
Plug In Elbow
Plug In Elbow
Part
Number		 Stem
OD		 Tube
OD
PM220404S 5/32 5/32
PI220606S 3/16 3/16
PI220808S 1/4 1/4
PM220808S 5/16 5/16
PI221206S 3/8 3/16
PI221208S 3/8 1/4
PI221210S 3/8 5/16
PI221212S 3/8 3/8
PI221616S 1/2 1/2
 
Swivel Elbow — NPTF Thread
Swivel Elbow - NPTF Thread
Part
Number		 Tube
OD		 Thread
NPTF
PM090421S 5/32 1/8
PM090422S 5/32 1/4
PI090621S 3/16 1/8
PI090821S 1/4 1/8
PI090822S 1/4 1/4
PM090821S 5/16 1/8
PM090822S 5/16 1/4
PM090823S 5/16 3/8
PI091221S 3/8 1/8
PI091222S 3/8 1/4
PI091223S 3/8 3/8
PI091622S 1/2 1/4
PI091623S 1/2 3/8
PI091624S 1/2 1/2
 
Swivel Elbow — BSPT Thread
Swivel Elbow - BSPT Thread
Part
Number		 Tube
OD		 Thread
BSPT
PI090601S 3/16 1/8
PI090801S 1/4 1/8
PI090802S 1/4 1/4
PM090801S 5/16 1/8
PM090802S 5/16 1/4
PM090803S 5/16 3/8
PI091202S 3/8 1/4
PI091203S 3/8 3/8
PI091603S 1/2 3/8
PI091604S 1/2 1/2
 
Swivel Branch Tee — NPTF Thread Center Leg
Swivel Branch Tee - NPTF Thread
Part
Number		 Tube
OD		 Thread
NPTF
PM100421S 5/32 1/8
PM100422S 5/32 1/4
PI100621S 3/16 1/8
PI100821S 1/4 1/8
PI100822S 1/4 1/4
PM100821S 5/16 1/8
PM100822S 5/16 1/4
PM100823S 5/16 3/8
PI101222S 3/8 1/4
PI101223S 3/8 3/8
PI101623S 1/2 3/8
PI101624S 1/2 1/2
 
Swivel Branch Tee — BSPT Thread Center Leg
Swivel Branch Tee - BSPT Thread
Part
Number		 Tube
OD		 Thread
BSPT
PI100601S 3/16 1/8
PI100801S 1/4 1/8
PI100802S 1/4 1/4
PM100801S 5/16 1/8
PM100802S 5/16 1/4
PM100803S 5/16 3/8
PI101202S 3/8 1/4
PI101203S 3/8 3/8
PI101603S 1/2 3/8
PI101604S 1/2 1/2
 
Swivel Male Run Tee — NPTF Thread
Swivel Male Run Tee - NPTF Thread
Part
Number		 Tube
OD		 Thread
NPTF
PM110421S 5/32 1/8
PM110422S 5/32 1/4
PI110621S 3/16 1/8
PI110821S 1/4 1/8
PI110822S 1/4 1/4
PM110821S 5/16 1/8
PM110822S 5/16 1/4
PM110823S 5/16 3/8
PI111222S 3/8 1/4
PI111223S 3/8 3/8
PI111623S 1/2 3/8
PI111624S 1/2 1/2
 
Swivel Male Run Tee — BSPT Thread
Swivel Male Run Tee - BSPT Thread
Part
Number		 Tube
OD		 Thread
BSPT
PI110601S 3/16 1/8
PI110801S 1/4 1/8
PI110802S 1/4 1/4
PM110801S 5/16 1/8
PM110802S 5/16 1/4
PM110803S 5/16 3/8
PI111202S 3/8 1/4
PI111203S 3/8 3/8
PI111603S 1/2 3/8
PI111604S 1/2 1/2
 
Bulkhead Union
Bulkhead Union
Part
Number		 Tube
OD		 Mounting Hole
Diameter (Inch)
PM1204S 5/32 0.67
PI1206S 3/16 0.67
PI1208S 1/4 0.67
PM1208S 5/16 0.83
PI1212S 3/8 0.83
PI1216S 1/2 1.06
 
Reducing Bulkhead Union
Reducing Bulkhead Union
Part
Number		 Tube
OD		 Tube
OD		 Mounting Hole
Diameter (Inch)
PI121208S 3/8 1/4 0.83
NC392-02 1/2 1/4 0.83
 
Tube to Hose Stem
Tube to Hose Stem
Part
Number		 Stem
OD		 Hose
ID
PI250806S 1/4 3/16
PI250808S 1/4 1/4
PI250810S 1/4 5/16
PI251006S 5/16 3/16
PI251008S 5/16 1/4
PM250808S 5/16 5/16
PI251012S 5/16 3/8
PI251208S 3/8 1/4
PI251210S 3/8 5/16
PI251212S 3/8 3/8
PI251216S 3/8 1/2
PI251612S 1/2 3/8
PI251616S 1/2 1/2
 
Tube to Hose Stem — Long Version
Tube to Hose Stem - Long Version
Part
Number		 Stem
OD		 Hose
ID
PI251012SL 5/16 3/8
PI251212SL 3/8 3/8
 
Tube to Hose Elbow
Tube to Hose Elbow
Part
Number		 Stem
OD		 Hose
ID
PI290808S 1/4 1/4
PI290810S 1/4 5/16
PI291008S 5/16 1/4
PM290808S 5/16 5/16
PI291208S 3/8 1/4
PI291210S 3/8 5/16
 
Dispensing Valve Stem
Dispensing Valve Stem
Part
Number		 Stem
OD
NC730-02 3/8
 
Dispensing Valve Elbow
Dispensing Valve Elbow
Part
Number		 Tube
OD		 Stem
OD
NC356-02 3/8 3/8
 
Offset Connector
Offset Connector
Part
Number		 Tube
OD		 Tube
OD
NC641 1/2 5/16
 
Two-Way Divider
Two-Way Divider
Part
Number		 Tube
OD
PI2308S 1/4
PM2308S 5/16
PI2312S 3/8
PI2316S 1/2
 
Unequal Two-Way Divider
Unequal Two-Way Divider
Part
Number		 Tube OD
Inlet		 Tube OD
Outlet
PI241210S 3/8 5/16
 
Three-Way Divider
Three-Way Divider
Part
Number		 Tube OD
Inlet		 Tube OD
Outlet
PI491212S-R 3/8 3/8
PI491612S 1/2 3/8
PI491616S 1/2 1/2

NOTE: PI491212S-R has red collet.
 
Cross
Cross
Part
Number		 Tube
OD
PI4712S 3/8
 
Reducing Tee
Reducing Tee
Part
Number		 Tube OD
Ends		 Tube OD
Branch
PI301208S 3/8 1/4
PI301612S 1/2 3/8
 
U-bend
U-Bend
Part
Number		 Tube
OD
PIUB12S 3/8
PIUB16S 1/2
U-Bend drawing
Tube to Hose Stem Attachment drawing The U-Bend is offered for 1/2 inch OD tube sizes. Existing 1/2 inch ID lines can be accommodated by using a standard Tube to Hose Stem.
 
 
John Guest Adaptability  
John Guest fittings can be quickly coupled together to form integral new fittings. John Guest Configuration Example
See more John Guest products available from SWT.
 
 
 
Safe Water Technologies, Inc.
996 Bluff City Boulevard
Elgin, IL 60120 USA
  
 
Telephone: +1.847.888.6900
Facsimile: +1.847.888.6924
E-mail: info@swtwater.com
https://www.swtwater.com

Last Updated: April 1, 2024