103724 DefendAir HEPA 500 DOP stage-two prefilter, 4-pack

Dri-Eaz 103724/F415 is the four-pack of DOP stage-two prefilters for the discontinued DefendAir HEPA 500 114178/F284 air scrubber. The manufacturer describes it as a laboratory-grade stage in the HEPA 500 three-stage filtration configuration. Install it between the standard F270 or F271 prefilter and the primary HEPA filter. The complete three-stage configuration may pass laboratory DOP testing; confirm the complete filter stack, testing procedure, contamination conditions, and current manufacturer instructions before use.

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FitsDefendAir HEPA 500 air scrubber (114178 / F284)

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The HEPA 500 equipment is discontinued, but Legend Brands continues to publish 103724/F415 as its four-pack DOP stage-two prefilter.
Install the DOP stage-two filter between the F270 or F271 standard prefilter and the primary HEPA filter.
A filter alone does not establish DOP-test compliance. Confirm the complete three-stage configuration, equipment condition, test procedure, contamination conditions, and current manufacturer instructions.
Wear appropriate protective equipment when handling contaminated filters and dispose of them according to applicable local requirements.

Part numbers

2 numbers

Current MPN103724

Other numbers103724F415

Prior numbersNone listed

Equipment fit

1 model

Fits this model

Dri-Eaz DefendAir HEPA 500 air scrubber (114178 / F284)

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The HEPA 500 equipment is discontinued, but Legend Brands continues to publish 103724/F415 as its four-pack DOP stage-two prefilter.
Install the DOP stage-two filter between the F270 or F271 standard prefilter and the primary HEPA filter.
A filter alone does not establish DOP-test compliance. Confirm the complete three-stage configuration, equipment condition, test procedure, contamination conditions, and current manufacturer instructions.
Wear appropriate protective equipment when handling contaminated filters and dispose of them according to applicable local requirements.

Specifications

6 details

Component: DOP stage-two prefilter
Package quantity: 4
Manufacturer product code: F415
Installed position: Between the F270 or F271 standard prefilter and the primary HEPA filter
Published use: Three-stage HEPA 500 filtration configuration for possible laboratory DOP testing
Reuse: Do not clean or reuse; replace after use to prevent cross-contamination

Documentation

2 references

Reference

Manufacturer documentation

Used to confirm the published part details.

Aug 17, 2026

Reference

Manufacturer documentation

Used to confirm the published part details.

Aug 17, 2026

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