Pressure Vessel Fittings
swtwater.com Flex Connectors
Flex Connectors are recommended to accommodate the vertical expansion between the side, top, and bottom opening of fiberglass/ composite pressure vessels in commercial and industrial applications. Made in USA.
 
SWT Flex Connectors
LEFT: NI-5285 Flex Connector
RIGHT: TS-5285 Flex Connector
CONNECTIONS & DIMENSIONS
NI-5282   1" MNPT x 1" MNPT x 14" OAL
NI-5285   2" MNPT x 2" MNPT x 14" OAL
NI-5286   3" MNPT x 3" MNPT x 14" OAL
TS-5285   2" MNPT x 2" MNPT x 12.25" OAL
TS-5286   3" MNPT x 3" MNPT x 13.125" OAL
MATERIALS OF CONSTRUCTION
NI-5282, NI-5285, NI-5286
Glass-filled polypropylene threaded end fittings, EPDM water suction hose, stainless steel banding, covered with blue heat shrink
TS-5285, TS-5286
Polypropylene threaded end fittings, white FDA neoprene rubber, polyester tire cord with a wire helix, covered with a smooth weather and abrasion resistant synthetic rubber
TECHNICAL SPECIFICATIONS
Max. Operating Temperature: 180°F (82°C)
Max. Operating Pressure: 150 psi
 
 
Metal Flex Connectors for Copper Pipe
PART
NUMBER 		CONNECTION
SIZE 		OAL
INCH 		MAX
PRESSURE
@ 70°F
EM1-005 1/2 inch Sweat 10" 450 PSI
EM1-007 3/4 inch Sweat 10" 340 PSI
EM1-010 1 inch Sweat 10" 302 PSI
EM1-012 1-1/4 inch Sweat 10" 280 PSI
EM1-015 1-1/2 inch Sweat 12" 245 PSI
EM1-020 2 inch Sweat 14" 190 PSI
EM1-025 2-1/2 inch Sweat 16" 150 PSI
EM1-030 3 inch Sweat 16" 150 PSI
Metal Flex Connector Cutaway Drawing
MATERIALS OF CONSTRUCTION
The braid is a tubular sheath of metal wires woven in a basket weave fashion. It is made to snugly fit over the corrugated hose, and is fastened to the ends of the hose. It is designed to be strong enough to withstand elongation for the full pressure rating of the hose. The ends are copper for sweat welding to copper pipe.
EM1-005, 007, 010, 012, 015, 020
Copper: Female tube end and braid collar
Bronze: Hose and braid
EM1-025, 030
Copper: Female tube end and braid collar
Stainless Steel: Hose and braid
Metal Flex Connector for Copper Pipe
Made in USA
LEAD FREE
The wetted surface of this product contacted by consumable water contains less than one quarter of one percent (0.25%) of lead by weight. Material complies with state codes and standards, where applicable, requiring reduced lead content.
 
 
PVC Sch80 Elastomer Flex Connector
PVC & CPVC Sch80 Elastomer Flex Connectors
• Convenient, double union end connections with strong, buttress thread union nuts
• Internal nylon cord reinforced elastomer bellows tube
• Chemically resistant neoprene elastomer or EPDM tube available
• Double spherical arch bellows provides improved movement capability
• Pressure rated to 150 psi @ 73°F (23°C)
• Available with socket or Special Reinforced (SR) female plastic thread with stainless steel collar end connectors
   
PVC ELASTOMER FLEX CONNECTORS
PART
NUMBER 		CONNECTION
SIZE 		BELLOWS
MATERIAL
EJ02-007 3/4 inch Socket Neoprene
EJ02-010 1 inch Socket Neoprene
EJ02-012 1-1/4 inch Socket Neoprene
EJ02-015 1-1/2 inch Socket Neoprene
EJ02-020 2 inch Socket Neoprene
EJ02-025 2-1/2 inch Socket Neoprene
EJ02-030 3 inch Socket Neoprene
PART
NUMBER 		CONNECTION
SIZE 		BELLOWS
MATERIAL
EJ01-007SR 3/4 inch FNPT Neoprene
EJ01-010SR 1 inch FNPT Neoprene
EJ01-012SR 1-1/4 inch FNPT Neoprene
EJ01-015SR 1-1/2 inch FNPT Neoprene
EJ01-020SR 2 inch FNPT Neoprene
EJ01-025SR 2-1/2 inch FNPT Neoprene
EJ01-030SR 3 inch FNPT Neoprene
PART
NUMBER 		CONNECTION
SIZE 		BELLOWS
MATERIAL
EJ22-007 3/4 inch Socket EPDM
EJ22-010 1 inch Socket EPDM
EJ22-012 1-1/4 inch Socket EPDM
EJ22-015 1-1/2 inch Socket EPDM
EJ22-020 2 inch Socket EPDM
EJ22-025 2-1/2 inch Socket EPDM
EJ22-030 3 inch Socket EPDM
PART
NUMBER 		CONNECTION
SIZE 		BELLOWS
MATERIAL
EJ21-007SR 3/4 inch FNPT EPDM
EJ21-010SR 1 inch FNPT EPDM
EJ21-012SR 1-1/4 inch FNPT EPDM
EJ21-015SR 1-1/2 inch FNPT EPDM
EJ21-020SR 2 inch FNPT EPDM
EJ21-025SR 2-1/2 inch FNPT EPDM
EJ21-030SR 3 inch FNPT EPDM
 
CPVC ELASTOMER FLEX CONNECTORS
PART
NUMBER 		CONNECTION
SIZE 		BELLOWS
MATERIAL
EJ22-007C 3/4 inch Socket EPDM
EJ22-010C 1 inch Socket EPDM
EJ22-012C 1-1/4 inch Socket EPDM
EJ22-015C 1-1/2 inch Socket EPDM
EJ22-020C 2 inch Socket EPDM
EJ22-025C 2-1/2 inch Socket EPDM
EJ22-030C 3 inch Socket EPDM
PART
NUMBER 		CONNECTION
SIZE 		BELLOWS
MATERIAL
EJ21-007CSR 3/4 inch FNPT EPDM
EJ21-010CSR 1 inch FNPT EPDM
EJ21-012CSR 1-1/4 inch FNPT EPDM
EJ21-015CSR 1-1/2 inch FNPT EPDM
EJ21-020CSR 2 inch FNPT EPDM
EJ21-025CSR 2-1/2 inch FNPT EPDM
EJ21-030CSR 3 inch FNPT EPDM
 
 
VACUUM PROTECTION & FLEX CONNECTORS
Fiberglass/composite pressure vessels are rated for an internal negative pressure of 5-inches Hg (17 Pa) vacuum below atmospheric. If negative pressure could ever exceed 5-inches Hg (17 Pa), an adequate vacuum breaker must be installed between the pressure vessel inlet and any valves (see illustration right). For enclosed tank applications, the vacuum breaker should be installed at the highest location in the system plumbing.

System connections to the pressure vessel must accomodate vertical expansion between side, top, and bottom openings. Either flexibility in piping or flex connectors, as shown here, are recommended.
SWT Vacuum Breaker and Flex Connector installation diagram
 
 
 
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