AlphaBackflows.com — commercial backflow inspection, repair, and installation

Assemblies & parts

Commercial backflow assemblies, supplied and installed.

We stock and install the assemblies commercial properties actually need — sized to your meter and hazard level, installed by certified testers, and filed with your county.

Assemblies we supply

Pricing depends on size, brand, hazard classification, and the install conditions on site, so every assembly is quoted per property — no generic list price that changes once we see the job.

Call for a quote
RPZ

Reduced Pressure Zone Assembly

Irrigation with fertigation, cooling towers, boiler make-up, process water, medical and lab feeds.

Sizes
3/4" – 10"
Hazard
High hazard
Price
Call for quote
  • Two independent check valves plus a differential relief valve
  • Working pressure to 175 psi, 33–140 °F
  • Bronze body to 2", epoxy-coated ductile iron 2 1/2" and up
  • ASSE 1013 / AWWA C511, USC approved, lead-free options

Models: Watts 909 / 957 · Zurn Wilkins 975XL2 · Febco 860 · Ames Colt 200

DCDA

Double Check Detector Assembly

Fire sprinkler and standpipe services where the utility requires leak detection.

Sizes
2 1/2" – 10"
Hazard
Low hazard, fire service
Price
Call for quote
  • Two spring-loaded checks with a metered bypass assembly
  • Working pressure to 175 psi, UL/FM approved bodies
  • Grooved or flanged end connections
  • Bypass meter reads unauthorized use and small leaks

Models: Watts 709DCDA · Zurn Wilkins 350DA · Ames 3000SS DCDA

DC

Double Check Valve Assembly

Closed heating and chilled-water loops, non-toxic process lines, condo domestic risers.

Sizes
3/4" – 10"
Hazard
Low hazard
Price
Call for quote
  • Two independent spring-loaded check valves in series
  • Working pressure to 175 psi, 33–140 °F
  • Resilient seated shutoffs and four test cocks
  • ASSE 1015 / AWWA C510 compliant

Models: Watts 007 / 709 · Zurn Wilkins 350 · Febco 850

PVB

Pressure Vacuum Breaker

Landscape irrigation zones on retail, office, and multifamily properties.

Sizes
1/2" – 2"
Hazard
Low hazard, back-siphonage only
Price
Call for quote
  • Single check with a spring-loaded air inlet
  • Must be installed 12" above the highest downstream outlet
  • Not rated for back-pressure conditions
  • ASSE 1020, freeze-drain models available

Models: Febco 765 · Watts 800M4 · Zurn Wilkins 720A

SVB

Spill-Resistant Vacuum Breaker

Indoor equipment feeds where a PVB discharge would spill onto finished space.

Sizes
1/2" – 2"
Hazard
Low hazard, indoor
Price
Call for quote
  • Diaphragm-actuated air inlet prevents spillage on start-up
  • Bronze body, 175 psi maximum working pressure
  • Test cock and single shutoff configuration
  • ASSE 1056 compliant

Models: Watts 008 · Febco 765SR · Zurn Wilkins 720ASR

Repair parts & accessories

We carry the components that keep an existing assembly in service, so most failed tests are fixed on the same visit rather than scheduled twice.

Complete rubber repair kits

OEM kits for Watts, Febco, Zurn Wilkins, Apollo, and Ames — checks, seats, and diaphragms.

Call for quote

Relief valve assemblies

Full relief valve modules and diaphragm sets for RPZ assemblies 3/4" through 10".

Call for quote

Check springs and poppets

First and second check components, including stainless springs for aggressive water.

Call for quote

Test cocks and shutoffs

Replacement test cocks, ball valves, and resilient wedge gate valves.

Call for quote

Enclosures and freeze protection

Aluminum and fiberglass hot boxes, insulated covers, and cages with locking hasps.

Call for quote

Bollards, pads, and piping

Concrete pads, bollards, brass and ductile iron risers for above-grade installs.

Call for quote

Ask about an assembly or part

Tell us the device size, brand, and property type and we'll come back with a firm price and lead time.

Book an inspection (954) 685-1888