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The Best Water Softener Air Gap of 2023 – Reviewed and Top Rated
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- BACKFLOW PROTECTION: Provides full backflow and anti-siphon protection to prevent wastewater from getting into water supply
- EASY TO INSTALL: Fits 1-1/2-in. and 2-in. diameter metal or plastic standpipes, can be mounted at 3 different levels
- STANDARD DESIGN: Allows soft rubber washer hose or aluminum washer drain hook up to share standpipe with other air gap units, recommended usage 1 to 7 gallons/minute (3. 7 to 26. 5 liters/minute)
- VARIOUS APPLICATIONS: For use with washing machine discharge, dehumidifiers, water filtration devices, and water softeners
- COMPLIANCE: UPC listed and tested for compliance to IPC and NSF standards, provides more than twice the code-required minimum air gap opening
- ♥ EASY TO CONNECT: Gap-Cap air gap (AG130-001) has 1/2-inch OD inlet port for 1/2-inch PVC pipe connection. The 1/2-inch inlet accommodates any 1/2-inch slip joint adapters including a threaded end, barb connection, and a quick connect for PEX tubing. The same inlet accommodates 5/8-inch OD tubing that can be directly inserted into the inlet. A 3/8-inch inlet port is provided for RO systems. This port can accommodate both 3/8-inch poly-tubing and 1/4-inch poly-tubing with included adapter.
- ♥ STANDPIPE CONNECTION: Gap-Cap air gap (AG130-001) inserts directly into the 1-1/2-inch and 2-inch standpipes. The body of the air gap provides stops to ensure secure placement. This air gap can be used with plastic or metal standpipes. If needed, it can be glued in place with plastic standpipes using regular PVC adhesive. The air gap outlet is designed to pass up to 7 gallons per minute. The optimum recommended flow rate is 4-5 gallons per minute.
- ♥ SPLASH PROTECTION: The AG130-001 air gap uses splash guards to assure a completely dry operation. Splash guards are an integral part of the design and can be seen through the side air gap window. During water softener operation, an initial discharge surge can create splashing. Splash shield eliminates the possibility of water splashing outside of the air gap. When designing drainage for an air gap, makes sure that P-trap is located minimum 20-inches from the top of the standpipe.
- ♥ QUIET OPERATION: When water exits the air gap, depending on the design, it may flow directly into a P-trap. This can create splashing noise that may be objectionable. To avoid excessive noise, it is recommended to use 22 degrees elbow inline with standpipe to avoid direct drainage to P-trap. The pipe elbow should be located at least 12 inches from the air gap to eliminate splashback.
- ♥ CERTIFICATION: The AG130-001 is legal to install in any state. It is UPC (Uniform Plumbing Code) Listed, IPC (International Plumbing Code) and NSF (National Sanitation Foundation) tested. These certifications assure that every product is safe to use. Also, all of the products are tested for strength and to make sure that every glue joint will withstand at least 40lb of force and not break. The testing is conducted for every manufactured lot to ensure consistent performance.
- ❤ SIMPLE INSTALLATION: The ET117-008 is designed for connecting discharge water tubing from a water softener to a drain line. Its 1/2-inch barb inlet accommodates a 1/2-inch ID poly tube, while its 1-1/2-inch OD outlet connects to a 1-1/2-inch standpipe drain. Included PVC adapters provide for a secure connection to the standpipe. A black vinyl end cap (P/N ET170-018) is offered as an optional accessory for the ET117-008. The ET117-008 can be pressure fit or glued to a plastic standpipe.
- ❤ STANDPIPE CONNECTION: The ET117-008 has a 1-1/2-inch OD outlet that connects to a 1-1/2-inch standpipe. The air gap can adapt to different pipe materials and sizes with the use of additional adapters or couplers. The air gap’s flow capacity is 15 gallons/minute.
- ❤ DRY OPERATION: The ET117-008 is designed with a splash guard to assure a completely dry operation.
- ❤ CERTIFICATION: The ET117-008 is legal to install in any state. It is UPC (Uniform Plumbing Code) and IPC (International Plumbing Code) listed. These certifications assure that every product is safe to use. The testing is conducted for every manufactured lot to ensure consistent performance.
- ❤ FLOW RATE: The ET115-002’s minimum flow rate is 0.5 gallons per minute (GPM) and the maximum flow rate is 9 gallons per minute (GPM). The minimum and maximum flow rates through an air gap are the lowest and highest flow rates at which water does not splash outside of an air gap. At minimum or maximum flow rate, the air gap is dry on the outside.
- ❤ SIMPLE INSTALLATION: The ET115-002 is designed for connecting discharge water tubing from a water softener system to a drain line. Its 3/4-inch MIPT threaded inlet accepts a 3/4-inch threaded PVC pipe or the 3/4-inch threaded ET170-XXX series air gap adapters (models -009 to -014). The ET115-002 installs to a 1-1/2 inches OD standpipe or 2 inches OD standpipe with 2-inch couplers. The ET115-002 can be pressure fit or glued to a plastic standpipe.
- ❤ STANDPIPE CONNECTION: The ET115-002 connects to a 1-1/2 inches OD standpipe or 2 inches OD standpipe with couplers. The air gap’s flow capacity is 15 gallons/minute.
- ❤ DRY OPERATION: The ET115-002 is designed with a splash guard to assure a dry operation. It is also recommended to install the ET115-002 at least 18 inches above the P-Trap to avoid water splashing back from the air gap.
- ❤ CERTIFICATION: ET115-002 is UPC (Uniform Plumbing Code) IPC (International Plumbing Code) Listed. The testing is conducted for every manufactured lot to ensure consistent performance.
- EASY DEVICE INSTALL: Four screws are included to mount air gap device securely to the top surface of a vented floor drain receptor cover
- EASY HEIGHT ADJUSTMENT: The height is adjustable up to 4 inches and screws are included to secure the device at the desired height to hold the critical line on the device above the Flood Level Rim
- EASY HOSE INSTALL: 3/8", 1/2" and 5/8" hose barbs molded directly into the assembly plus a port for a press-on fitting (sold separately) to receive a reverse osmosis discharge line
- FLOW RATE: The DC-225-400 is recommended for combined flow rates up to 8 gallons per minute (GPM)
- COLORS: Available in black or white
Last update on 2025-07-15 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API
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FAQ:
Q: What is a floor drain air gap?
A: An air gap is the most simple and effective means of preventing contamination of a potable water supply. Once potable water leaves the outlet of a fixture, it’s either used or sent down the drain.
Q: What is the air gap in a washing machine?
A: The purpose of an air gap is to prevent contaminated water from being pulled back into the water supply system. This would be nearly impossible with a clothes washer due to it’s design. The air gap is the point in between where the water enters the fixture and where the water exits the fixture.
Q: What is an air gap in a kitchen sink?
A: An air gap is the unobstructed space between a wall outlet and an open vessel or flood level of a fixture. An example of an air gap is the space between a faucet and the sink rim. This gap prevents the reverse flow of contaminated water from the sink back into the faucet without some modification of the system.
Q: What is an air gap valve?
A: The simplest, most reliable way to provide backflow prevention is to provide an air gap. An air gap is simply an open vertical space between any device that connects to a plumbing system (like a valve or faucet) and any place where contaminated water can collect or pool. A simple air gap has no moving parts, other than flowing water.