Need help? Please call: (800) 575-9618

Account Log In

Home
Repair Parts
Complete Assemblies
Specialty Tools
Accessories
Testing Equipment
Enclosures & Cages
Shutoff Valves
ACV
Fire Protection

0

Total: $0.00 Go to Cart Empty Cart

Login

Repair Parts

Ames
Apollo / Conbraco
A.R.I
Beeco

Cla-Val
Deringer
Febco
Flomatic

Hersey
Rain Bird
Watts
Wilkins

Need Help? 1 (800) 575-9618 Contact Us

Talk to our technical team for help finding your part

Complete Assemblies

Ames
Apollo / Conbraco
A.R.I
Beeco

Deringer
Febco
Watts
Wilkins

Need Help? 1 (800) 575-9618 Contact Us

Talk to our technical team for help finding your part

Specialty Tools

Ames
Apollo / Conbraco
Febco
Flomatic

Watts
Wilkins
Universal
Backflow Repair Manual

Need Help? 1 (800) 575-9618 Contact Us

Talk to our technical team for help finding your part

Accessories

Theft Prevention
Soft Seated Check Valves
Wye Strainers
Flange Accessories
Lube

Water Meters
Water Hammer Arrestors
Thermal Expansion Tanks
Freeze Protection Valves

Backflow Tags
Test Fittings & Adapters
Backflow Repair Manual

Need Help? 1 (800) 575-9618 Contact Us

Talk to our technical team for help finding your part

Testing Equipment

Duke Barton
Mid-West
Watts
Arbiter

Test Fittings
Testing Tools
Schedule A Calibration

Need Help? 1 (800) 575-9618 Contact Us

Talk to our technical team for help finding your part

Enclosures & Cages

HotBox
SafeTCover
Small Enclosures
Large Enclosures

Rock Enclosures
Cages
Insulated Bags

Need Help? 1 (800) 575-9618 Contact Us

Talk to our technical team for help finding your part

Shutoff Valves

Outside Stem & Yoke (OS&Y)
Non-Rising Stem (NRS)
Butterfly Gate Valves (BGV)
General Use Ball Valves

Gear Operated Ball Valves
Bolt & Gasket Kits
Test Cocks

Need Help? 1 (800) 575-9618 Contact Us

Talk to our technical team for help finding your part

ACV

Ames
Apollo / Conbraco
Bermad
Cla-Val

Flomatic
OCV
Singer
Watts

Zurn/Wilkins

Need Help? 1 (800) 575-9618 Contact Us

Talk to our technical team for help finding your part

Fire Protection

Fire Pump Repack Kits
Fire Pump Accessories
Casing Relief Valves
Fire Pump Relief Valves

UL Listed Pressure Reducing Valves
Testing Equipment
Hose Valves & Test Headers
Riser & Standpipe Equipment

Altitude Control Valves
Control Valves
Gauges
Accessories
Supervisory and Flow Switches

Need Help? 1 (800) 575-9618 Contact Us

Talk to our technical team for help finding your part

Repair Parts

Ames
Apollo / Conbraco
A.R.I
Beeco

Cla-Val
Deringer
Febco
Flomatic

Hersey
Rain Bird
Watts
Wilkins

Complete Assemblies

Ames
Apollo / Conbraco
A.R.I
Beeco

Deringer
Febco
Watts
Wilkins

Specialty Tools

Ames
Apollo / Conbraco
Febco
Flomatic

Watts
Wilkins
Universal
Backflow Repair Manual

Accessories

Theft Prevention
Soft Seated Check Valves
Wye Strainers
Flange Accessories
Lube

Water Meters
Water Hammer Arrestors
Thermal Expansion Tanks
Freeze Protection Valves

Backflow Tags
Test Fittings & Adapters
Backflow Repair Manual

Testing Equipment

Duke Barton
Mid-West
Watts
Arbiter

Test Fittings
Testing Tools
Schedule A Calibration

Enclosures & Cages

HotBox
SafeTCover
Small Enclosures
Large Enclosures

Rock Enclosures
Cages
Insulated Bags

Shutoff Valves

Outside Stem & Yoke (OS&Y)
Non-Rising Stem (NRS)
Butterfly Gate Valves (BGV)
General Use Ball Valves

Gear Operated Ball Valves
Bolt & Gasket Kits
Test Cocks

ACV

Ames
Apollo / Conbraco
Bermad
Cla-Val

Flomatic
OCV
Singer
Watts

Zurn/Wilkins

Fire Protection

Fire Pump Repack Kits
Fire Pump Accessories
Casing Relief Valves
Fire Pump Relief Valves

UL Listed Pressure Reducing Valves
Testing Equipment
Hose Valves & Test Headers
Riser & Standpipe Equipment

Altitude Control Valves
Control Valves
Gauges
Accessories
Supervisory and Flow Switches

American Backflow / Products / Complete Assemblies / 4″ 450ST w/ OS&Y

Product

4″ 450ST w/ OS&Y

Login to see pricing

Part # 450STY-4

Need Help? Please Call Us At: (800) 575-9618

Customer Service
Meet Our Team
Contact Us
Calibrate Your Test Kit
Satisfaction Survey

Repair Info
Repair Videos
Step By Step Repair Procedures
Backflow Test Procedures
Assembly Lay Length Chart
Repair Guys Articles
Spec Sheets
Educational Videos

Links
Training Schools
Professional Associations
ABPA Chapters
USC Backflow Approvals
ASSE Backflow Approvals
IAPMO
Backflow News

Forms
Credit Application
Custom Order Form
Return Form
Manufacturer Price Lists (MSRP)

© 2024 American Backflow Products Company. All Rights Reserved. WordPress Hosting, Maintenance & Support by Sunny HQ

Search Part Number

Products

Search Results View all results

Sign up

First Name *

Last Name *

Company Name *

Phone Number (+ Extension if Applicable) *

Email address *

Your personal data will be used to support your experience throughout this website, to manage access to your account, and for other purposes described in our privacy policy.

Login/Register

Thank you for shopping with American Backflow Products Company.

Continue Shop Products

Already have an account? Login here:

Login

Username or email address *

Password *

Remember Me

Lost your password?

Need an account? Choose account type below:

Professional Register

Retail Shop Now

Cleantalk Pixel