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Bronze backflow preventer with threaded connections and compact valve body

Apollo

Apollo 4ALF203A2F Reduced Pressure Zone Backflow Preventer 1/2 in Lead Free Bronze

SKU CH-5Z8E-AJ43N

Reduced pressure zone backflow preventer with 1/2 in FNPT connection, lead-free bronze body, 175 psi rating, and 33 to 180 °F temperature range

  • Reduced-pressure zone design stops contaminated water reversing
  • Lead-free bronze body meets low-lead plumbing standards
  • Operates reliably from 33 to 180 degrees F
  • Withstands up to 175 psi supply pressure
  • Certified to ASSE 1013 and CSA B64.4 standards

Apollo 4ALF-200 Series Backflow Preventer

The Apollo 4ALF-200 Series is a reduced pressure zone backflow preventer built for potable water systems requiring lead free components. Its bronze body meets low lead regulations for safe drinking water installations. The unit protects supply lines from both back siphonage and back pressure contamination risks.

Lead Free Bronze Body with FNPT Connections

The body uses lead free bronze rated for a maximum pressure of 175 psi and temperatures from 33 to 180 degrees F. Female NPT threads allow direct connection to standard piping without extra adapters. The assembly measures 10 7/8 in length, 2 7/8 in width and 7 1/8 in height for tight mechanical rooms.

Certified to ASSE 1013 and CSA B64.4 Standards

This preventer carries ARRA, ASSE 1013, CSA B64.4 and USC FCCCHR approvals for cross connection control programs. The reduced pressure zone principle requires periodic testing and maintenance access to verify relief valve operation. Installers must allow clearance for test cocks and potential discharge during relief events.

How it compares

Measured against everything we stock in Faucet Valves & Replacement Parts, at today’s prices. Recalculated every night.

Price $374.99
Pricier than about 90% of the 1,132 comparable items (median $54.99).

Specifications

Product
Brand nameAPOLLO
Product typeOther

Questions about this item

What does the ASSE 1013 standard cover for this backflow preventer?

ASSE 1013 certifies the device as a reduced pressure zone assembly for backflow protection. It verifies performance under continuous pressure up to 175 psi and water temperatures up to 180 °F.

What pipe thread and clearance does the 1/2 in FNPT connection need?

The unit uses 1/2 inch female NPT threads. It measures 10 7/8 in long, 2 7/8 in wide and 7 1/8 in high, so allow that envelope plus wrench swing space.

How is the Apollo 4ALF203A2F installed and what step is often missed?

Install horizontally on a cold or hot line between 33 °F and 180 °F. Flush the line first; debris is the most common cause of check valve fouling.

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