We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Brass double check valve assembly with FNPT connections, 12-3/4 inches long, lead-free bronze body

Apollo

Apollo 4ALF104A2F Double Check Valve Assembly 3/4 In

SKU CH-5X5A-R7WDN

Double check valve assembly for backflow prevention with lead-free bronze body, 175 psi max pressure and 180°F max temperature

  • Lead-free bronze body for safer potable water
  • Double check design prevents backflow contamination
  • Operates from 33 to 180 degrees Fahrenheit
  • Withstands up to 175 psi working pressure
  • Meets USC, IAPMO and CSA standards

Double Check Valve Assembly

The Apollo 4ALF104A2F is a double check valve assembly sized for 3/4 inch FNPT connections. It is built for potable water systems that require backflow prevention to meet plumbing codes. The body uses lead-free bronze rated for temperatures from 33 to 180 degrees Fahrenheit and a maximum pressure of 175 psi.

Installation and Common Issues

The valve installs inline with standard FNPT threads and measures 12-3/4 inches in length, 3 inches wide and 3-1/2 inches high. Ensure the piping is flushed before fitting to avoid debris fouling the checks. The most common issue is installing the unit backwards; flow direction arrows on the body must match the system flow.

Suitability and Alternatives

This assembly suits residential or light commercial supply lines that need code-compliant double-check protection at 3/4 inch size. It is not for high-hazard cross-connections that require a reduced-pressure principle assembly. Buyers needing a different pipe size or a testable RPZ device should look at other configurations.

How it compares

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

Price $178.99
Pricier than about 77% of the 1,132 comparable items (median $54.99).

Specifications

Product
Brand nameAPOLLO
Product typeOther

Questions about this item

How do I confirm the Apollo 4ALF-100 is working correctly after installation?

Verify water flows through the 3/4 In. FNPT connections without leaks and that system pressure stays at or below 175 psi while operating between 33 and 180 degrees F.

What comes in the box with the Apollo 4ALF-104A2F and what must be purchased separately?

The assembly includes the lead free bronze double check valve body with FNPT ends; pipe thread sealant, adapters and any required test cocks are not included and must be sourced separately.

Which version of the Apollo 4ALF series should I choose for a 3/4 In. line?

Select the 4ALF-100 series in the 3/4 In. size with FNPT connection; it meets USC, IAPMO and CSA standards and is rated for 175 psi maximum pressure.

More in Faucet Valves & Replacement Parts

Similar items