DrainGapMulti-Port Drain Adapter

Applications Requiring Air Gaps

For connections that require drain air gaps, a patented DrainGap™ Multi-Port Drain Adapter with a first-of-its-kind, two-stage integrated drain air gap ensures code compliance and minimizes splashing for up to four drain connections—saving space, cost and time.

Connections & Materials

  • 100% lead-free
  • 1/2" female NPT threaded inputs
  • Durable, non-corrosive Schedule 40 PVC
  • Installs vertically almost anywhere needed
  • Different models accept 1-1/2” pipe, or use 2”, 3” or 4” couplings (not included)
  • Resists Chlorine and Chloramine corrosion
  • Resists hardness and scale buildup

Industries & Typical Applications

  • Residential, commercial & light industrial
  • Food service & appliance drain lines
  • Water treatment, softeners & general filters
  • Reverse osmosis & deionization systems
  • Dialysis systems
DrainGap Multi-Port Drain Adapter with Air Gap - DH154-AG DrainGap Multi-Port Drain Adapter with Air Gap - DH154-AG Case DrainGap Multi-Port Drain Adapter with Air Gap - DH304-AG DrainGap Multi-Port Drain Adapter with Air Gap - DH304-AG Case DrainGap Multi-Port Drain Adapter with Air Gap - DH404-AG DrainGap Multi-Port Drain Adapter with Air Gap - DH404-AG Case

DrainGap
Multi-Port Drain Adapter with Air Gap

Applications Requiring Air Gaps

$ 39.99 $ 49.99 $ 49.99 $ 335.92 $ 419.92 $ 419.92
DH154-AG Standard Flow- Accepts 1.5" Pipe or 2" Coupling
- Flow rate up to 3 GPM
DH304-AG Higher Flow
- Requires 3" Coupling (Not Included)
- Flow rate up to 7 GPM
DH404-AG Max Flow
- Requires 4" Coupling (Not Included)
- Flow rate up to 11 GPM
Output Size
Packaging

Orders $98+ ship free to contiguous USA!

Looking for compatible fittings?

DrainGap's ports are compatible with any 1/2" NPT threaded fitting. For your convenience, we offer a small selection of fittings for our most popular applications.

View Fittings

Standards Certification & Compliance

QAI Certification

QAI Listed

View PDF
  • ASME A112.1.3

    This Standard establishes physical requirements and methods of testing for air gap fittings for protecting against back siphonage and back pressure backflow.

    Learn more
  • ASTM D2665

    This specification refers to the requirements and test methods associated with the virgin polyvinyl chloride (PVC) construction of plastic drain, waste, and vent pipe and fittings. Covered fittings are subjected to hydrostatic burst pressure and impact-resistance testing.

    Learn more
  • ASTM F1498

    This specification establishes requirements for dimensions and gaging of taper pipe threads used on threaded plastic pipe and fittings.

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  • IAPMO PS 65

    This Standard covers air gap units intended for water conditioning equipment installation and specifies requirements for materials, physical characteristics, markings, and performance testing methods for protecting against backsiphonage and backpressure backflow.

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  • NSF 61

    NSF/ANSI 61 addresses the human health effects of drinking water system components. This performance-based standard evaluates the amount of contaminants that leach from the products into potable drinking water. The origin for this standard was lead reduction/ removal. Any lead that elutes into the water at over 0.25% fails this standard.

    Learn more
  • NSF 372

    NSF/ANSI 372 establishes a standardized methodology for the determination and verification of product compliance to minimize lead contaminants. This standard is consistent with the United States Safe Drinking Water Act (SDWA) and its lead-free plumbing requirements, as well as the requirements of individual U.S. states such as California.

    Learn more

Specifications

Material White PVC
Inputs 1/2" Female NPT (Qty 4)
Output 1.5" Pipe or 2" Coupling
Diameter 4.5"
11.43 cm
Height 7"
17.78 cm
Weight 12.9 oz
365.7 g
Max Operating Temperature 140º F
60º C
Max Flow Rate - Backsiphonage 4 gpm
15.14 Lpm
Max Flow Rate - Backpressure 11 gpm
41.64 Lpm
Max Operating Pressure N/A
Typical Medium Water
Vertical Orientation Yes
Continuous or Intermittent PSI Yes
Material White PVC
Inputs 1/2" Female NPT (Qty 4)
Output Requires 3" Coupling
Diameter 4.5"
11.43 cm
Height 8.75"
22.23 cm
Weight 15.1 oz
428.1 g
Max Operating Temperature 140º F
60º C
Max Flow Rate - Backsiphonage 7 gpm
26.50 Lpm
Max Flow Rate - Backpressure 11 gpm
41.64 Lpm
Max Operating Pressure N/A
Typical Medium Water
Vertical Orientation Yes
Continuous or Intermittent PSI Yes
Material White PVC
Inputs 1/2" Female NPT (Qty 4)
Output Requires 4" Coupling
Diameter 4.5"
11.43 cm
Height 8.375"
21.27 cm
Weight 15.1 oz
428.1 g
Max Operating Temperature 140º F
60º C
Max Flow Rate - Backsiphonage 11 gpm
41.64 Lpm
Max Flow Rate - Backpressure 11 gpm
41.64 Lpm
Max Operating Pressure N/A
Typical Medium Water
Vertical Orientation Yes
Continuous or Intermittent PSI Yes

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