John Guest Products
swtwater.com ProLock Fittings
John Guest ProLock Twist-to-Lock Fittings
 
NSF Standard 61 Certified.
 
  For use with copper, PEX,
and CPVC pipes conforming to ASTM standards.
 
   
ProLock Fittings are offered in 3/8 to 1 inch CTS sizes. They have been specifically designed for the professional plumber. The fittings are manufactured from high quality engineered plastic with EPDM o-rings. ProLock Twist-to-Lock fittings are suitable for hot and cold water plumbing applications.

ProLock fittings have a collet with stainless steel teeth that grip the pipe when fully inserted, and an o-ring to provide a permanent, leak-proof seal. When twisted into place, the indicator marks will align, and the locking cap will fasten the pipe in place with an audible click, ensuring maximum security. No tools, soldering, clamps, or glue are ever required.

Working Pressures and Temperatures
Water: Max. 160 psi at 73°F (max. 11 bar at 23°C)
Max. 100 psi at 180°F (max. 7 bar at 82°C)
Max. 80 psi at 200°F (max. 5.5 bar at 93°C)
 
Tee
ProLock Tee
Part
Number
Size CTS
End
(Inch)
Size CTS
End
(Inch)
Size CTS
Branch
(Inch)
PSEI0216E 3/8 3/8 3/8
PSEI0220E 1/2 1/2 1/2
PSEI0228E 3/4 3/4 3/4
PSEI0236E 1 1 1
 
Elbow
ProLock Elbow
Part
Number
Size
CTS
(Inch)
Size
CTS
(Inch)
PSEI0316E 3/8 3/8
PSEI0320E 1/2 1/2
PSEI0328E 3/4 3/4
PSEI0336E 1 1
 
Coupler
ProLock  Coupler
Part
Number
Size
CTS
(Inch)
Size
CTS
(Inch)
PSEI0416E 3/8 3/8
PSEI0420E 1/2 1/2
PSEI0428E 3/4 3/4
PSEI0436E 1 1
 
Reducing Coupler
ProLock Reducing Coupler
Part
Number
Size
CTS
(Inch)
Size
CTS
(Inch)
PSEI202016E 1/2 3/8
PSEI202820E 3/4 1/2
PSEI203628E 1 3/4
 
Reducing Elbow
ProLock Reducing Elbow
Part
Number
Size
CTS
(Inch)
Size
CTS
(Inch)
PSEI212016E 1/2 3/8
PSEI212820E 3/4 1/2
PSEI213628E 1 3/4
 
Reducing Tee
ProLock Reducing Tee
Part
Number
Size CTS
End
(Inch)
Size CTS
End
(Inch)
Size CTS
Branch
(Inch)
PSEI3016AE 1/2 1/2 3/8
PSEI3028AE 3/4 3/4 1/2
PSEI3028BE 3/4 1/2 1/2
PSEI3028CE 1/2 1/2 3/4
PSEI3028DE 3/4 1/2 3/4
PSEI3036AE 1 1 3/4
 
Plug-in Elbow
ProLock Plug-in Elbow
Part
Number
Size
Stem
(Inch)
Size
CTS
(Inch)
PSEI222020E 1/2 1/2
PSEI222828E 3/4 3/4
PSEI223636E 1 1
 
Reducer
ProLock Reducer
Part
Number
Size
Stem
(Inch)
Size
CTS
(Inch)
PSEI062016E 1/2 3/8
PSEI062820E 3/4 1/2
PSEI063628E 1 3/4
 
Male Connector — NPT Thread
ProLock Male Connector - NPT Thread
Part
Number
Size
CTS
(Inch)
Size
NPT
(Inch)
PSEI011624E 3/8 1/2
PSEI012024E 1/2 1/2
PSEI012024EPX2 1/2 1/2
PSEI012026E 1/2 3/4
PSEI012824E 3/4 1/2
PSEI012826E 3/4 3/4
PSEI012826EPX2 3/4 3/4
PSEI012828E 3/4 1
PSEI013626E 1 3/4
PSEI013628E 1 1
 
Male Stem Adapter — NPT Thread
ProLock Male Stem Adapter - NPT Thread
Part
Number
Size
Stem
(Inch)
Size
NPT
(Inch)
PSEI052826E 3/4 3/4
PSEI053628E 1 1
 
Male Fixed Elbow — NPT Thread
ProLock Male Fixed Elbow - NPT Thread
Part
Number
Size
CTS
(Inch)
Size
NPT
(Inch)
PSEI482024E 1/2 1/2
 
Female Connector — NPS Thread
ProLock Female Connector - NPS Thread
Part
Number
Size
CTS
(Inch)
Size
NPS
(Inch)
PSEI622036E-L 1/2 3/4
PSEI622836E-L 3/4 3/4
PSEI622838E-L 3/4 1
PSEI623638E-L 1 1
PSEI62363AE-L 1 1-1/4
 
Female Elbow Connector — NPS Thread
ProLock Female Elbow Connector - NPS Thread
Part
Number
Size
CTS
(Inch)
Size
NPS
(Inch)
PSEI632836E-L 3/4 3/4
PSEI632838E-L 3/4 1
PSEI63283AE-L 3/4 1-1/4
PSEI63363AE-L 1 1-1/4
 
Female Stem Adapter — NPS Thread
ProLock Female Stem Adapter - NPS Thread
Part
Number
Size
CTS
(Inch)
Size
NPS
(Inch)
PSEI502034E 1/2 1/2
 
End Cap
ProLock End Cap
Part
Number
Size
CTS
(Inch)
PSEI4616E 3/8
PSEI4620E 1/2
PSEI4628E 3/4
PSEI4636E 1
 
Slip Connector
ProLock Slip Connector
Part
Number
Size
CTS
(Inch)
Size
CTS
(Inch)
1/2SCEP 1/2 1/2
3/4SCEP 3/4 3/4
 
Stackable Tee
ProLock Stackable Tee
Part
Number
Size Stem
End
(Inch)
Size CTS
End
(Inch)
Size CTS
Branch
(Inch)
PSEI532020E 1/2 1/2 1/2
PSEI532820E 3/4 3/4 1/2
PSEI532828E 3/4 3/4 3/4
PSEI533628E 1 1 3/4
 
Shutoff Valve
ProLock Shutoff Valve
Part
Number
Size
CTS
(Inch)
Size
CTS
(Inch)
PSEISV20EP 1/2 1/2
PSEISV28EP 3/4 3/4
 
Female Garden Hose Elbow
Female Garden Hose Elbow
Part
Number
Size
OD
(Inch)
Size
NH
(Inch)
NC2723 3/8 3/4"-11.5
 
Brass Male Connector — NPT Thread
ProLock Brass Male Connector - NPT Thread
Part
Number
Size
CTS
(Inch)
Size
NPT
(Inch)
MWI011624LF-E 3/8 1/2
MWI012024LF-E 1/2 1/2
MWI012026LF-E 1/2 3/4
MWI012824LF-E 3/4 1/2
MWI012826LF-E 3/4 3/4
MWI012828LF-E 3/4 1
MWI013626LF-E 1 3/4
MWI013628F-E 1 1
 
Brass Male Stem Adapter — NPT Thread
Brass Male Stem Adapter - NPT Thread
Part
Number
Size
Stem
(Inch)
Size
NPT
(Inch)
MWI052024LF 1/2 1/2
MWI052826LF 3/4 3/4
 
Brass Female Connector — NPS Thread
ProLock Brass Female Connector - NPS Thread
Part
Number
Size
CTS
(Inch)
Size
NPS
(Inch)
PSEI601634E 3/8 1/2
PSEI602034E 1/2 1/2
PSEI602036E 1/2 3/4
PSEI602834E 3/4 1/2
PSEI602836E 3/4 3/4
PSEI603638E 1 1
 
Brass Female Elbow Connector — NPS Thread
ProLock Brass Female Elbow Connector - NPS Thread
Part
Number
Size
CTS
(Inch)
Size
NPS
(Inch)
PSEI612034E 1/2 1/2
PSEI612836E 3/4 3/4
 
Brass Female Drop Ear Elbow — NPT Thread
ProLock Brass Female Drop Ear Elbow - NPT Thread
Part
Number
Size
CTS
(Inch)
Size
NPT
(Inch)
WBI2024E 1/2 1/2
 
Flexi Hose — 18 inch Length
ProLock Flexi Hose - 18 inch Length
Part
Number
Size
CTS
(Inch)
Size
NPS
(Inch)
PSFC20N3618E 1/2 3/4
PSFC28N3618E 3/4 3/4
 
Part
Number
Size
CTS
(Inch)
Size
CTS
(Inch)
PSFC28C2818E 3/4 3/4
 
 
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