Skip Content

Please Upgrade Your Browser Grainger will no longer support Internet Explorer 8 as of 07/2018. Please upgrade your browser or contact your System Administrator for support.


3/4" Dual Check Valve, Lead Free Bronze, FNPT Connection Type

  • Item # 52DD47
  • My Part #
  • Mfr. Model # 4ALF3A44A
  • Catalog Page # 2907
  • UNSPSC # 40141622
3/4" Dual Check Valve, Lead Free Bronze, FNPT Connection Type close

Using 360° Viewing:

  1. Rotate: Use top-to-bottom, side-to-side by use of mouse arrow.
  2. Zoom In: Double click on image.
  3. Zoom Out/Reset: Put photo at full zoom & then double click.

CAD Downloads

Web Price $44.70 / each
Activate Now

to save with

Select AdvantageSM

Please sign in or register to access lists

Please sign in or register to access Quote

Want to Get Free Shipping?

  • Shipping Weight 1.45 lbs.
Country of Origin China Country of Origin is subject to change.
Note: Product availability is real-time updated and adjusted continuously. The product will be reserved for you when you complete your order. More

Product Details

This corrosion-resistant APOLLO dual check valve helps prevent backflow by either backpressure or back-siphonage from a cross connection between potable water lines and substances that are objectionable, but not health hazards.

• Independently-acting captured spring
• Low head loss

View More

Technical Specs

  • Item Dual Check Valve
  • Material of Construction Lead Free Bronze
  • Size 3/4"
  • Connection Type FNPT
  • Length 4-1/2"
  • Width 4-1/2"
  • Overall Height 2-1/4"
  • Cap to Inlet Center 2"
  • Max. Steam Pressure 125 psi SWP
  • Max. Water Pressure 175 psi
  • Cracking Pressure 2 psi
  • Max. Temp. 180 Degrees F
  • Mounting Position Horizontal
  • Seat Material Buna N
  • Spring Material Stainless Steel
  • Seal Material PTFE
  • Flow 3 gpm
  • Hex Size 2-3/8"
  • Standards ASSE 1024
  • Compliance ASSE 1024 CSA B64.6
How can we improve our Technical Specifications?

Compliance and Restrictions

  • This product has been manufactured to be compliant with the “Safe Drinking Water Act” requirements for low lead in potable (human consumption - drinking and cooking) and non-potable water applications (non-human consumption).

  • This item has been restricted from sale in the following countries: Central African Republic, Cuba, Eritrea, Iraq, Iran, North Korea, Lebanon, Liberia, and Syria.

  • This item is restricted for international sale.This item is restricted for conveying or dispensing water for potable use (human consumption) in states that require 3rd party certification of compliance with the “Safe Water Drinking Act” (CA, LA, MD, VT).

Alternate Products

Alternate Products may not be identical in style or function to original selection. Please compare below for more information.

Alternate Search Terms

Customer Reviews

Product Reviews Disclaimer:
Grainger is neither responsible for, nor does it endorse, the content of any product review or statement posted. Any statements posted constitute the statements of the poster and are not the statements of Grainger. The statements posted by Grainger employees with the Grainger employee badge represent the views of such employees and are not the statements of Grainger. Grainger makes no representations as to the appropriateness, accuracy, completeness, correctness, currentness, suitability, or validity of any product review or statements posted, including those posted by employees with the Grainger employee badge, and is not liable for any losses, injuries or damages which may result from any such product review or statements. Use of any linked web site provided in a product review or post is at the user's own risk.